US20120139789A1 - Transmitter independent techniques to extend the performance of passive coherent location - Google Patents
Transmitter independent techniques to extend the performance of passive coherent location Download PDFInfo
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- US20120139789A1 US20120139789A1 US11/688,348 US68834807A US2012139789A1 US 20120139789 A1 US20120139789 A1 US 20120139789A1 US 68834807 A US68834807 A US 68834807A US 2012139789 A1 US2012139789 A1 US 2012139789A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/003—Bistatic radar systems; Multistatic radar systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/66—Radar-tracking systems; Analogous systems
- G01S13/72—Radar-tracking systems; Analogous systems for two-dimensional tracking, e.g. combination of angle and range tracking, track-while-scan radar
- G01S13/723—Radar-tracking systems; Analogous systems for two-dimensional tracking, e.g. combination of angle and range tracking, track-while-scan radar by using numerical data
- G01S13/726—Multiple target tracking
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/86—Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar
- G01S13/878—Combination of several spaced transmitters or receivers of known location for determining the position of a transponder or a reflector
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/06—Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements
Definitions
- No. 11/145,170 is a Continuation-In-Part of U.S. patent application Ser. No. 10/743,042 filed Dec. 23, 2003 and incorporated herein by reference; application Ser. No. 10/743,042 is a Continuation-In-Part of U.S. patent application Ser. No. 10/638,524 filed Aug. 12, 2003 and incorporated herein by reference; application Ser. No. 10/638,524 is a Continuation of U.S. patent application Ser. No. 09/516,215 filed Feb. 29, 2000 and incorporated herein by reference; application Ser. No. 09/516,215 claims is a Non Prov. of Provisional U.S. Patent Application Ser. No. 60/123,170 filed Mar.
- application Ser. No. 10/743,042 is a Continuation-In-Part of U.S. patent application Ser. No. 10/319,725 filed Dec. 16, 2002 and incorporated herein by reference.
- Application Ser. No. 10/743,042 is a Non Prov. of Provisional U.S. Patent Application Ser. No. 60/440,618 filed Jan. 17, 2003 and incorporated herein by reference;
- the present application is also a Continuation-In-Part of U.S. patent application Ser. No. 11/649,350, filed Jan. 3, 2007, and incorporated herein by reference.
- the present invention relates to aircraft tracking.
- the present invention is directed toward transmitter independent techniques to extend the performance of passive coherent location.
- a pulsed signal is transmitted and the time taken for the pulse to travel to the object and back allows the range of the object to be determined.
- the receiver uses third-party transmitters and measures the time difference of arrival (TDOA) between the signal arriving directly from the transmitter and the signal arriving via reflection from the object, allowing the bi-static range of the object to be determined.
- TDOA time difference of arrival
- passive radar can also measure the bi-static Doppler shift of the echo and also its direction of arrival allowing the location, heading and speed of the object to be calculated.
- multiple transmitters and receivers are used to make several independent measurements of bi-static range, Doppler and bearing and hence significantly improve the final track accuracy.
- the Passive Coherent Location (PCL) system is bi-static radar, which measures the elliptical distance and the Doppler frequency shift. It works with continuous wave (CW) transmitters of opportunity, meaning that it uses electromagnetic radiation, primarily assigned for another purpose, for example, radio or television terrestrial broadcasts. It is necessary to detect at least two (in an ideal case three or more) direct signals from transmitters for a proper determination of a target position.
- CW continuous wave
- CW continuous wave
- analog signals include conventional FM radio or television
- digitally encoded signals include new television formats for audio, video, and telecommunications (e.g., DAB, DVB, and GSM).
- That technique claims a method of determining the position of a target using components in a wireless communication system in which pre-stored codes are included in transmissions of communications signals as part of a communication protocol, comprising the steps of: a) providing a transmitter which transmits a communications signal; b) providing a plurality of receivers, in communication with each other, which receive communications signals reflected from the target, the receivers being disposed at locations which are separate from the transmitter and separate from each other, and being time or phase synchronized; c) determining a time of arrival information of the received communications signal at each receiver by continuously correlating the code in the received communications signal with the pre-stored codes in the receiver; and d) using information pertaining to the location of each receiver, together with the information obtained from step c), to determine the target position.
- Atkinson et al uses a priori information relating to digital encoded signals where the receiver essentially identifies embedded data formats such as headers, lead-ins, or other recognizable formats.
- the technique appears to have been developed with digital communications in mind, and is not described for older analog transmission such as conventional television, FM radio, or other analog signals.
- Atkinson's patent relies on unique or known characteristics contained within the raw digital data encoding of the transmitted signal for time or phase referencing.
- the present invention is directed toward methods to improve the performance of passive coherent location by non-reliance on a direct view of the signal source.
- Passive Coherent Location or PCL
- PCL Passive Coherent Location
- FIG. 1 is a block diagram of a first embodiment of the present invention, illustrating establishing References from a Source Signal's Characteristics.
- FIG. 2 is a block diagram of a second embodiment of the present invention, illustrating the relative Comparison of Reflected Signals.
- FIG. 3 is a block diagram of a third embodiment of the present invention, illustrating the use of Mobile Transmission Sources.
- FIG. 4 is a diagram illustrating CAF for Direct and Scattered FM Signals (time delay ⁇ transformed to range in km).
- FIG. 5 is a diagram illustrating an Eight-Point FFT-Radix2 and Elementary Butterfly Operation.
- FIG. 1 is a block diagram of a first embodiment of the present invention, illustrating establishing References from a Source Signal's Characteristics.
- this embodiment shows several FM transmitters 10 , 20 , 30 where the signals are reflected from an aircraft 100 and are received at multiple PCL receiver locations 110 , 150 .
- time references for each of the signals are established through analysis of the reflected signals, such as analog television information patterns, FM modulation characteristics, or through signal characterization and processing, including spectral analysis, of the signals in real time, or near real time with quantifiable known delays such as those associated with gate array technology.
- the time-stamped signals are then forwarded 200 to a central server 250 for PCL processing including detection, correlation, feature extraction, and line tracking, and then sent for display 300 or forwarding for integration with other surveillance systems.
- This embodiment is essentially a distributed timing system, where timing references are established at the receivers 150 .
- FIG. 2 is a block diagram of a second embodiment of the present invention, illustrating the relative Comparison of Reflected Signals.
- this embodiment shows several FM transmitters 10 , 20 , 30 where the signals are reflected from an aircraft 100 and are received at multiple PCL receiver locations 110 , 150 .
- signals are down-converted, as in conventional multilateration, into video equivalent signals, which are passed along media 200 sufficient to provide the necessary bandwidth.
- media 200 includes fiber or radio link.
- This embodiment shows a high-level two-step process at the central server. Firstly the incoming signals are matched to determine which reflected signals apply to each target, taking into account Doppler effects, and secondly for timing, detection, correlation, feature extraction, and line tracking, and then sent for display 400 or forwarding for integration with other surveillance systems.
- This embodiment is essentially a centralized timing system where the timing is established through relative signal comparison at the central server 300 .
- FIG. 3 is a block diagram of a third embodiment of the present invention, illustrating the use of Mobile Transmission Sources.
- this embodiment shows several aircraft-based transmitters 10 , 20 , 30 where the signals are reflected from an aircraft 100 and are received at multiple PCL receiver locations 110 , 150 . In this case there is line of sight to some or all of the aircraft based transmitters and the reference channel 50 , 550 , 600 to the transmitters 10 , 20 , 30 .
- Typical aircraft transmitters 10 , 20 , 30 may include CW or pulse systems, such as collision avoidance system, Mode S, or ADS-B transponders, which constantly transmit in typical airspace.
- the PCL can operate in a conventional fashion with line of sight to the transmitters or decoding can be accomplished as in embodiments 1 and 2 above.
- FM radio characteristics of interest over the typical FM frequency range of 88 MHz to 108 MHz include modulation depth, modulation frequency deviation, and other characteristics such as peak and semi-peak values.
- Two separate methods are 1) use of unique signal characteristics to use as a time or phase reference or 2) comparison of reflected versions of the same source.
- CAF cross ambiguity function
- FIG. 4 illustrates—CAF for Direct and Scattered FM Signals (time delay ⁇ transformed to range in km)
- Pl ⁇ hacek over (s) ⁇ ek et al define the Cross Ambiguity Function (CAF) mathematically as:
- CAF ⁇ ( ⁇ , f ) ⁇ 0 T ⁇ s 1 ⁇ ( t ) ⁇ s 2 * ⁇ ( t + ⁇ ) ⁇ ⁇ - j ⁇ ⁇ 2 ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ft ⁇ ⁇ t ( 1 )
- T is the integration period (or interval) in seconds
- ⁇ is the time delay in seconds
- f is the Doppler frequency offset in Hertz.
- T s is the sample period
- s 1 and s 2 are the discrete-time (sampled) signals in the analytic signal complex format
- N is the total number of samples in s 1 and s 2
- ⁇ is the time delay in samples
- CAF( ⁇ ,k) is the frequency difference in digital frequency, or a fraction of the sampling frequency.
- , will peak when ⁇ and
- CAF( ⁇ ,k) is also capable of a signal detection due to the fact that the presence of peaks in the CAF( ⁇ ,k) may be used as a robust signal detector, even for signals with extremely low SNR.
- Equation (2) can uncover TDOAs in the range:
- the optimal algorithm for effective CAF computation is a direct application of the Fast Fourier Transform (FFT) into the signal product of the signals s 1 and s 2 ,
- CAF( ⁇ , k ) FFT( s 1 ( n ) s 2 *( n + ⁇ )) (3)
- One method for a fast and robust CAF calculation is a hardware implementation of the direct FFT method. Another way to perform these tasks is to deploy a cluster of computers with high-speed network interconnections and an appropriate number of computing nodes.
- FIG. 5 shows the basic computational Eight Point FFT-radix-2 structure in terms of elementary “butterfly” operations.
- FIG. 7 illustrates an example of a “butterfly” reduction, which is not necessary for FFT calculation for limited frequency ranges. It is possible to obtain a modified FFT-radix2 algorithm with about 62% reduction of the required “butterfly” operations.
Abstract
Description
- This application is a Continuation-In-Part of U.S. patent application Ser. No. 11/492,711, filed Jul. 25, 2006, and incorporated herein by reference; This application is a Continuation-In-Part of U.S. patent application Ser. No. 11/429,926, filed on May 8, 2006, and incorporated herein by reference; This application is a Continuation-In-Part of U.S. patent application Ser. No. 11/343,079, filed on Jan. 30, 2006, and incorporated herein by reference; This application is also a Continuation-In-Part of U.S. patent application Ser. No. 11/342,289 filed Jan. 28, 2006 and incorporated herein by reference; This application is a Continuation-In-Part of U.S. patent application Ser. No. 11/209,030, filed on Aug. 22, 2005, and incorporated herein by reference; This application is a Continuation-In-Part of U.S. patent application Ser. No. 11/257,416, filed on Oct. 24, 2005, and incorporated herein by reference; This application is a Continuation-In-Part of U.S. patent application Ser. No. 11/203,823 filed Aug. 15, 2005 and incorporated herein by reference; This application is a Continuation-In-Part of U.S. patent application Ser. No. 11/145,170 filed on Jun. 6, 2005 and incorporated herein by reference; application Ser. No. 11/145,170 is a Continuation-In-Part of U.S. patent application Ser. No. 10/743,042 filed Dec. 23, 2003 and incorporated herein by reference; application Ser. No. 10/743,042 is a Continuation-In-Part of U.S. patent application Ser. No. 10/638,524 filed Aug. 12, 2003 and incorporated herein by reference; application Ser. No. 10/638,524 is a Continuation of U.S. patent application Ser. No. 09/516,215 filed Feb. 29, 2000 and incorporated herein by reference; application Ser. No. 09/516,215 claims is a Non Prov. of Provisional U.S. Patent Application Ser. No. 60/123,170 filed Mar. 5, 1999 and incorporated herein by reference; application Ser. No. 10/743,042 is a Continuation-In-Part of U.S. patent application Ser. No. 10/319,725 filed Dec. 16, 2002 and incorporated herein by reference. Application Ser. No. 10/743,042 is a Non Prov. of Provisional U.S. Patent Application Ser. No. 60/440,618 filed Jan. 17, 2003 and incorporated herein by reference; The present application is also a Continuation-In-Part of U.S. patent application Ser. No. 11/649,350, filed Jan. 3, 2007, and incorporated herein by reference.
- The present invention relates to aircraft tracking. In particular, the present invention is directed toward transmitter independent techniques to extend the performance of passive coherent location.
- With a conventional radar system, a pulsed signal is transmitted and the time taken for the pulse to travel to the object and back allows the range of the object to be determined. In a passive radar system, there is no dedicated transmitter. Instead, the receiver uses third-party transmitters and measures the time difference of arrival (TDOA) between the signal arriving directly from the transmitter and the signal arriving via reflection from the object, allowing the bi-static range of the object to be determined. In addition to bi-static range, passive radar can also measure the bi-static Doppler shift of the echo and also its direction of arrival allowing the location, heading and speed of the object to be calculated. In some cases, multiple transmitters and receivers are used to make several independent measurements of bi-static range, Doppler and bearing and hence significantly improve the final track accuracy.
- The Passive Coherent Location (PCL) system is bi-static radar, which measures the elliptical distance and the Doppler frequency shift. It works with continuous wave (CW) transmitters of opportunity, meaning that it uses electromagnetic radiation, primarily assigned for another purpose, for example, radio or television terrestrial broadcasts. It is necessary to detect at least two (in an ideal case three or more) direct signals from transmitters for a proper determination of a target position.
- As of December 2006, there are several PCL systems in various stages of development or deployment, including:
-
- Silent Sentry is a Lockheed Martin (USA) PCL system that uses FM radio transmissions. Two different antenna variants are believed to be available providing an antenna that provides 360° azimuth coverage from 4 different beams (an Adcock array), and a variant that provides 100° azimuth coverage from six different beams (linear array). It has a range of up to around 100 nautical miles depending on the variant employed and a number of receive nodes at different locations can be combined to provide increased coverage. See, http://www.dtic.mil/ndia/jaws/sentry.pdf, incorporated herein by reference.
- Celldar is a British system developed jointly by Roke Manor and BAE Systems. The system is a PCL sensor that can exploit GSM signals, currently in the 900 MHz band, but may also be able to use the 900 MHz and 1800 MHz bands simultaneously in the future. It is believed that Celldar is a low level/surface surveillance system designed to achieve good coverage below 10,000 ft and can track targets in 2D over a 100° sector at ranges of up to around 60 km. See, http://www.roke.co.uk/skills/radar/, incorporated herein by reference.
- CORA is a German PCL sensor, developed by FGAN (Die Forschungsgesellschaft für Angewandte Naturwissenschaften e.V.), that exploits Digital Video Broadcast—Terrestrial (DVB-T) and Digital Audio Broadcast (DAB) transmissions.
- Cristal is a PCL sensor developed by Thales that exploits FM radio transmissions to track targets. In addition to Cristal, it is believed that Thales has a prototype PCL system that uses analog TV or DAB transmissions.
- One of the PCL systems developed by ERA, formerly Rannoch Corporation, (www.rannoch.com) uses FM radio transmissions.
- Each of these systems rely on continuous wave (CW) communications whether or not the CW signal is modulated to provide analog or digital information, as the techniques basically rely on the comparison of delayed versions of the source (i.e., the reflections) with the original CW signal. For example, analog signals include conventional FM radio or television, while digitally encoded signals include new television formats for audio, video, and telecommunications (e.g., DAB, DVB, and GSM).
- U.S. Pat. No. 7,155,240, entitled “Method of Determining the Position of a Target Using Transmitters of Opportunity,” (Atkinson et al.), and incorporated herein by reference, describes a technique for non-reliance on line of sight with a digital source signal such as GSM. That technique claims a method of determining the position of a target using components in a wireless communication system in which pre-stored codes are included in transmissions of communications signals as part of a communication protocol, comprising the steps of: a) providing a transmitter which transmits a communications signal; b) providing a plurality of receivers, in communication with each other, which receive communications signals reflected from the target, the receivers being disposed at locations which are separate from the transmitter and separate from each other, and being time or phase synchronized; c) determining a time of arrival information of the received communications signal at each receiver by continuously correlating the code in the received communications signal with the pre-stored codes in the receiver; and d) using information pertaining to the location of each receiver, together with the information obtained from step c), to determine the target position.
- In essence, the technique described by Atkinson et al uses a priori information relating to digital encoded signals where the receiver essentially identifies embedded data formats such as headers, lead-ins, or other recognizable formats. The technique appears to have been developed with digital communications in mind, and is not described for older analog transmission such as conventional television, FM radio, or other analog signals. Essentially, Atkinson's patent relies on unique or known characteristics contained within the raw digital data encoding of the transmitted signal for time or phase referencing.
- The present invention is directed toward methods to improve the performance of passive coherent location by non-reliance on a direct view of the signal source. Passive Coherent Location, or PCL, has become a promising technology as more computer processing power has become generally available. Basically, most PCL techniques rely on comparing signal sources with their reflections from an object in order to determine the location of the object. However, this requires line of sight access from the receiver system to the signal source which may not always be practical and may limit the performance of the system overall. The techniques described herein do not require line of sight to the transmitter sources.
-
FIG. 1 is a block diagram of a first embodiment of the present invention, illustrating establishing References from a Source Signal's Characteristics. -
FIG. 2 is a block diagram of a second embodiment of the present invention, illustrating the relative Comparison of Reflected Signals. -
FIG. 3 is a block diagram of a third embodiment of the present invention, illustrating the use of Mobile Transmission Sources. -
FIG. 4 is a diagram illustrating CAF for Direct and Scattered FM Signals (time delay π transformed to range in km). -
FIG. 5 is a diagram illustrating an Eight-Point FFT-Radix2 and Elementary Butterfly Operation. -
FIG. 6 illustrates an FFT-radix2 Error for N=217 Samples for Different Arithmetic Representations. -
FIG. 7 is a diagram illustrating an FFT-radix2 Butterfly Reduction for N=25 Samples using 4 Spectral Coefficients. -
FIG. 1 is a block diagram of a first embodiment of the present invention, illustrating establishing References from a Source Signal's Characteristics. Referring toFIG. 1 , this embodiment showsseveral FM transmitters aircraft 100 and are received at multiplePCL receiver locations - Unlike conventional PCL, there is no direct line of sight from a
reference channel transmitters receiver locations 150, time references for each of the signals are established through analysis of the reflected signals, such as analog television information patterns, FM modulation characteristics, or through signal characterization and processing, including spectral analysis, of the signals in real time, or near real time with quantifiable known delays such as those associated with gate array technology. - The time-stamped signals are then forwarded 200 to a central server 250 for PCL processing including detection, correlation, feature extraction, and line tracking, and then sent for
display 300 or forwarding for integration with other surveillance systems. - This embodiment is essentially a distributed timing system, where timing references are established at the
receivers 150. -
FIG. 2 is a block diagram of a second embodiment of the present invention, illustrating the relative Comparison of Reflected Signals. Referring toFIG. 2 , this embodiment showsseveral FM transmitters aircraft 100 and are received at multiplePCL receiver locations - Again, unlike conventional PCL, there is no direct line of sight from a
reference channel transmitters - Instead at
receiver locations 150, signals are down-converted, as in conventional multilateration, into video equivalent signals, which are passed alongmedia 200 sufficient to provide the necessary bandwidth. For example, appropriate media includes fiber or radio link. - This embodiment shows a high-level two-step process at the central server. Firstly the incoming signals are matched to determine which reflected signals apply to each target, taking into account Doppler effects, and secondly for timing, detection, correlation, feature extraction, and line tracking, and then sent for
display 400 or forwarding for integration with other surveillance systems. - This embodiment is essentially a centralized timing system where the timing is established through relative signal comparison at the
central server 300. -
FIG. 3 is a block diagram of a third embodiment of the present invention, illustrating the use of Mobile Transmission Sources. Referring toFIG. 3 , this embodiment shows several aircraft-basedtransmitters aircraft 100 and are received at multiplePCL receiver locations reference channel transmitters -
Typical aircraft transmitters embodiments - Thus, it is possible to use unique or identifiable reference information from any type of signal, whether digital or analog, which may be identifiable from the raw signal or from data reduction and analysis of the signal.
- One of the issues with continuous wave tracking techniques is the sheer volume of data and processing power required to characterize and analyze signals. Therefore, it is necessary to consider various methods to reduce the data into salient characteristics for the purpose of comparison and characterization. For example, FM radio characteristics of interest over the typical FM frequency range of 88 MHz to 108 MHz include modulation depth, modulation frequency deviation, and other characteristics such as peak and semi-peak values.
- In addition to using reference characteristics of waveforms for time referencing it is also possible to compare only signal reflections from a common source, even with the coherent source to perform positioning using time difference of arrival techniques.
- Two separate methods are 1) use of unique signal characteristics to use as a time or phase reference or 2) comparison of reflected versions of the same source.
- Therefore, in either of the two cases, it is possible to use the original CW information, or to use a characterization of the signal, such as a Fast Fourier Transform (FFT) or other characterization of the signal as described in the following publications which are incorporated herein by reference: Slezák, L., Kvasni{hacek over (c)}a, M., Pelant, M., Vávra, J., Pl{hacek over (s)}ek, R.: Simulation and Evaluation of the Passive Coherent Location system. In Proc. International Radar Symposium 2005,
Berlin 200; and Kvasni{hacek over (c)}ka, M., He{hacek over (r)}mánek, A., Pelant, M., Pl{hacek over (s)}ek, R.: Passive Coherent Location FPGA implementation of the Cross Ambiguity Function. In Proc. Signal Processing Symposium 2005, Wilga 2005. - A significant part of PCL processing is cross ambiguity function (CAF) computation and its decomposition into clutter and target components. The target CAF component is analyzed via a sequential target elimination process. As a result, the parameters defined for each detected target are: instantaneous bi-static RCS, ground clutter estimation, elliptical range and velocity, elliptical acceleration and RCS change during the integration period.
- A sufficiently fast and reliable computation of the cross ambiguity function (CAF) is one of the most important tasks and also a computationally time consuming part of PCL processing.
FIG. 4 illustrates—CAF for Direct and Scattered FM Signals (time delay τ transformed to range in km) Pl{hacek over (s)}ek et al define the Cross Ambiguity Function (CAF) mathematically as: -
- where s1 and s2 are continuous-time signals in the analytic signal complex format, T is the integration period (or interval) in seconds, τ is the time delay in seconds, and f is the Doppler frequency offset in Hertz.
- In order to shift equation (1) into the discrete or sampled time domain, let t=nTs and
-
- where Ts is the sample period,
-
- is the sampling frequency, n represents individual sample numbers, and N is the total number of samples. Inserting these values into eq. (1) and simplifying yields the discrete form of the CAF:
-
- where s1 and s2 are the discrete-time (sampled) signals in the analytic signal complex format, N is the total number of samples in s1 and s2, τ is the time delay in samples, and
-
- is the frequency difference in digital frequency, or a fraction of the sampling frequency. The magnitude of the CAF(τ,k), or |CAF(τ,k)|, will peak when τ and
-
- are equal to the embedded TDOA (Time Difference of Arrival) and FDOA (Frequency Difference of Arrival), respectively, between the signals s1 and s2. Note that CAF(τ,k) is also capable of a signal detection due to the fact that the presence of peaks in the CAF(τ,k) may be used as a robust signal detector, even for signals with extremely low SNR.
- Computational efficiency becomes a large factor because of the potentially wide range of TDOAs and FDOAs that must be searched. Equation (2) can uncover TDOAs in the range:
-
- −N≦τ≦N and FDOAs for k in the range
-
- To search the entire range of possible TDOAs and FDOAs would require 2N2 calculations of the CAF, which is an ominous task for large N or equivalently for long integration interval T.
- The optimal algorithm for effective CAF computation is a direct application of the Fast Fourier Transform (FFT) into the signal product of the signals s1 and s2,
-
CAF(τ,k)=FFT(s 1(n)s 2*(n+τ)) (3) - Using eq. (3) to calculate CAF for all values of τ and k, an individual FFT computation is required for each value of τ.
- One method for a fast and robust CAF calculation is a hardware implementation of the direct FFT method. Another way to perform these tasks is to deploy a cluster of computers with high-speed network interconnections and an appropriate number of computing nodes.
- The basic requirements for CAF calculation in PCL signal processing are as follows:
-
- Sampling frequency: 100-200 kHz
- Effective bit resolution (dynamic range) for input signals: 18-24 bits (˜100 dB)
- Total number of samples or integration interval: 217=131 072 samples or about 1 sec
- Frequency resolution: <1 Hz
- Accuracy of CAF calculation: absolute error about 10−9÷10−12 with comparison to IEEE 64-bit floating-point arithmetic
- Maximum number of time delays: <1024
- Maximum frequency range: −300,+300Hz (about 600 spectral coefficients)
- Total time of computation: <1 sec (final requirements is about 10 ms for real time PCL system)
This computational task is extremely challenging due to the sheer volume of input data and the need for high accuracy of the CAF computation.
- The basic part of the CAF computation algorithm is a radix-2 implementation of the general FFT algorithm. The theoretical computational complexity of this algorithm is O(N log2 N) operations (compare with O(N2) for a standard DFT).
FIG. 5 shows the basic computational Eight Point FFT-radix-2 structure in terms of elementary “butterfly” operations. - More effective implementations of the FFT exist, such as radix-4 and split-radix but they are significantly more complicated to implement, and this example is restricted to radix-2 for the purposes of discussion and presentation.
- A practical approach to FFT/CAF implementation is significantly influenced by the arithmetic representation (fixed or floating-point) and numerical accuracy. As an optimal arithmetic representation, a fixed-point numerical representation with 42-46 bit accuracy may be employed as illustrated in
FIG. 6 .FIG. 6 illustrates an FFT-radix2 Error for N=217 Samples for Different Arithmetic Representations. - For limited frequency ranges, e.g., −300,+300 Hz, which represents only about a 1% fraction of the frequency range up to the Nyquist frequency, the number of operations may be reduced significantly.
FIG. 7 illustrates an example of a “butterfly” reduction, which is not necessary for FFT calculation for limited frequency ranges. It is possible to obtain a modified FFT-radix2 algorithm with about 62% reduction of the required “butterfly” operations. - While the preferred embodiment and various alternative embodiments of the invention have been disclosed and described in detail herein, it may be apparent to those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope thereof.
Claims (12)
Priority Applications (3)
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US10/319,725 US6812890B2 (en) | 2000-02-29 | 2002-12-16 | Voice recognition landing fee billing system |
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US10/638,524 US6806829B2 (en) | 1999-03-05 | 2003-08-12 | Method and apparatus for improving the utility of a automatic dependent surveillance |
US10/743,042 US7132982B2 (en) | 1999-03-05 | 2003-12-23 | Method and apparatus for accurate aircraft and vehicle tracking |
US11/145,170 US7437250B2 (en) | 1999-03-05 | 2005-06-06 | Airport pavement management system |
US11/203,823 US7739167B2 (en) | 1999-03-05 | 2005-08-15 | Automated management of airport revenues |
US11/209,030 US7248219B2 (en) | 2000-02-29 | 2005-08-22 | Correlation of flight track data with other data sources |
US11/257,416 US7495612B2 (en) | 1999-03-05 | 2005-10-24 | Method and apparatus to improve ADS-B security |
US11/342,289 US7576695B2 (en) | 1999-03-05 | 2006-01-28 | Multilateration enhancements for noise and operations management |
US11/343,079 US7375683B2 (en) | 1999-03-05 | 2006-01-30 | Use of geo-stationary satellites to augment wide— area multilateration synchronization |
US11/429,926 US7477193B2 (en) | 1999-03-05 | 2006-05-08 | Method and system for elliptical-based surveillance |
US11/492,711 US7429950B2 (en) | 1999-03-05 | 2006-07-25 | Method and apparatus to extend ADS performance metrics |
US11/649,350 US8446321B2 (en) | 1999-03-05 | 2007-01-03 | Deployable intelligence and tracking system for homeland security and search and rescue |
US11/688,348 US8203486B1 (en) | 1999-03-05 | 2007-03-20 | Transmitter independent techniques to extend the performance of passive coherent location |
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US11/257,416 Continuation-In-Part US7495612B2 (en) | 1999-03-05 | 2005-10-24 | Method and apparatus to improve ADS-B security |
US11/342,289 Continuation-In-Part US7576695B2 (en) | 1999-03-05 | 2006-01-28 | Multilateration enhancements for noise and operations management |
US11/343,079 Continuation-In-Part US7375683B2 (en) | 1999-03-05 | 2006-01-30 | Use of geo-stationary satellites to augment wide— area multilateration synchronization |
US11/492,711 Continuation-In-Part US7429950B2 (en) | 1999-03-05 | 2006-07-25 | Method and apparatus to extend ADS performance metrics |
US11/649,350 Continuation-In-Part US8446321B2 (en) | 1999-03-05 | 2007-01-03 | Deployable intelligence and tracking system for homeland security and search and rescue |
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US11/749,045 Continuation-In-Part US7782256B2 (en) | 1999-03-05 | 2007-05-15 | Enhanced passive coherent location techniques to track and identify UAVs, UCAVs, MAVs, and other objects |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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US10281569B2 (en) * | 2013-05-24 | 2019-05-07 | Thales | Method for locating a target and multistatic radar system for implementing such a method |
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US11448744B2 (en) * | 2019-12-31 | 2022-09-20 | Woven Planet North America, Inc. | Sequential doppler focusing |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7782256B2 (en) | 1999-03-05 | 2010-08-24 | Era Systems Corporation | Enhanced passive coherent location techniques to track and identify UAVs, UCAVs, MAVs, and other objects |
US7777675B2 (en) | 1999-03-05 | 2010-08-17 | Era Systems Corporation | Deployable passive broadband aircraft tracking |
US8203486B1 (en) | 1999-03-05 | 2012-06-19 | Omnipol A.S. | Transmitter independent techniques to extend the performance of passive coherent location |
US7739167B2 (en) | 1999-03-05 | 2010-06-15 | Era Systems Corporation | Automated management of airport revenues |
US7889133B2 (en) | 1999-03-05 | 2011-02-15 | Itt Manufacturing Enterprises, Inc. | Multilateration enhancements for noise and operations management |
US7570214B2 (en) | 1999-03-05 | 2009-08-04 | Era Systems, Inc. | Method and apparatus for ADS-B validation, active and passive multilateration, and elliptical surviellance |
US7908077B2 (en) | 2003-06-10 | 2011-03-15 | Itt Manufacturing Enterprises, Inc. | Land use compatibility planning software |
US7667647B2 (en) | 1999-03-05 | 2010-02-23 | Era Systems Corporation | Extension of aircraft tracking and positive identification from movement areas into non-movement areas |
US8446321B2 (en) | 1999-03-05 | 2013-05-21 | Omnipol A.S. | Deployable intelligence and tracking system for homeland security and search and rescue |
US7952511B1 (en) | 1999-04-07 | 2011-05-31 | Geer James L | Method and apparatus for the detection of objects using electromagnetic wave attenuation patterns |
US7965227B2 (en) | 2006-05-08 | 2011-06-21 | Era Systems, Inc. | Aircraft tracking using low cost tagging as a discriminator |
DE102009032773B3 (en) * | 2009-07-10 | 2010-12-02 | Fcs Flight Calibration Services Gmbh | Secondary radar signal receiver and method for determining defined reception times of secondary radar signals in a multilateration system |
CN102096067A (en) * | 2010-11-30 | 2011-06-15 | 哈尔滨工程大学 | Passive radar direct wave interference suppression method based on compass as external radiation source |
DE102012013804A1 (en) * | 2012-07-12 | 2014-01-16 | Eads Deutschland Gmbh | Air surveillance procedure for an aircraft |
EP2762915B1 (en) * | 2013-01-31 | 2018-01-03 | HENSOLDT Sensors GmbH | Method for operating a passive radar |
US9188979B2 (en) | 2013-08-06 | 2015-11-17 | Lockheed Martin Corporation | Method and system for remotely controlling a vehicle |
GB201319151D0 (en) * | 2013-10-30 | 2013-12-25 | Ucl Business Plc | Apparatus and method for performing passive sesing |
CN106610484B (en) * | 2015-10-21 | 2019-05-03 | 云辰电子开发股份有限公司 | A kind of device and method for detecting heat source orientation |
IT201600102764A1 (en) * | 2016-10-13 | 2018-04-13 | Univ Degli Studi Di Firenze | BISTATIC INTERFEROMETRIC TERRESTRIAL RADAR WITH TRANSPONDER |
CN111398894A (en) * | 2020-04-03 | 2020-07-10 | 中国电子科技集团公司第二十八研究所 | Low-slow small target detection tracking system and method based on mobile communication network |
Family Cites Families (621)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1738571A (en) | 1927-08-19 | 1929-12-10 | Gare Thomas | Wearing surface of pavements, roads, treads, and the like |
US3668403A (en) | 1969-05-05 | 1972-06-06 | Goodyear Aerospace Corp | Method and apparatus for vehicle traffic control |
US3705404A (en) | 1969-11-17 | 1972-12-05 | John P Chisholm | Aircraft clock monitoring and time propagating |
US3757035A (en) | 1970-04-21 | 1973-09-04 | Skiatron Elect & Tele | Interrogated transponder system |
US4315609A (en) | 1971-06-16 | 1982-02-16 | The United States Of America As Represented By The Secretary Of The Navy | Target locating and missile guidance system |
US3792472A (en) | 1972-08-14 | 1974-02-12 | Bendix Corp | Warning indicator to alert aircraft pilot to presence and bearing of other aircraft |
US4196474A (en) | 1974-02-11 | 1980-04-01 | The Johns Hopkins University | Information display method and apparatus for air traffic control |
US4122522A (en) | 1974-05-20 | 1978-10-24 | Smith Gerald R | Aircraft ground monitoring system |
US4115771A (en) | 1976-05-11 | 1978-09-19 | Litchstreet Co. | Passive ATCRBS using signals of remote SSR |
JPS5353899A (en) | 1976-10-22 | 1978-05-16 | Toyo Communication Equip | Aircraft collision prevent system |
US4224669A (en) | 1977-12-22 | 1980-09-23 | The Boeing Company | Minimum safe altitude monitoring, indication and warning system |
US4229737A (en) | 1978-02-06 | 1980-10-21 | Cubic Western Data | Ranging system and method for determining the range of a vehicle from a plurality of reference points |
US4454510A (en) | 1978-12-18 | 1984-06-12 | Crow Robert P | Discrete address beacon, navigation and landing system (DABNLS) |
US4327437A (en) | 1980-07-30 | 1982-04-27 | Nasa | Reconfiguring redundancy management |
US4359733A (en) | 1980-09-23 | 1982-11-16 | Neill Gerard K O | Satellite-based vehicle position determining system |
SE441315B (en) | 1980-11-12 | 1985-09-23 | Ingf N D C Netzler & Dahlgren | DEVICE FOR INDICATING SOME DISTANCE BETWEEN REAL VEHICLES |
US5191342A (en) | 1981-08-06 | 1993-03-02 | The United States Of America As Represented By The Secretary Of The Navy | Fix-tracking system |
US4688046A (en) | 1982-09-13 | 1987-08-18 | Isc Cardion Electronics, Inc. | ADF bearing and location for use with ASR and ASDE displays |
US4646244A (en) | 1984-02-02 | 1987-02-24 | Sundstrand Data Control, Inc. | Terrain advisory system |
JPS61105700A (en) | 1984-10-29 | 1986-05-23 | 東洋通信機株式会社 | Opponent aircraft tracking display system for aircraft collision preventor |
CA1243117A (en) | 1985-02-22 | 1988-10-11 | Michael M. Grove | Altitude loss after take-off warning system utilizing time and altitude |
US4782450A (en) | 1985-08-27 | 1988-11-01 | Bennett Flax | Method and apparatus for passive airborne collision avoidance and navigation |
US5113193A (en) | 1985-11-12 | 1992-05-12 | The United States Of America As Represented By The Secretary Of The Air Force | Autonomous synchronization of a bistatic synthetic aperture radar (SAR) system |
US4811308A (en) | 1986-10-29 | 1989-03-07 | Michel Howard E | Seismo-acoustic detection, identification, and tracking of stealth aircraft |
DE3637129A1 (en) | 1986-10-31 | 1988-05-11 | Deutsche Forsch Luft Raumfahrt | METHOD FOR DETERMINING THE POSITION OF AN AIRPLANE IN A THREE-WAY DME SYSTEM |
IT1205769B (en) | 1987-03-26 | 1989-03-31 | Selenia Spazio Spa | RADAR SYSTEM CONSTITUTED BY A SERIES OF INTERCONNECTED ELEMENTARY SATELLITES |
JPS63253278A (en) | 1987-04-10 | 1988-10-20 | Sony Corp | Position measuring method using satellite |
US4910526A (en) | 1987-05-18 | 1990-03-20 | Avion Systems, Inc. | Airborne surveillance method and system |
US5075694A (en) | 1987-05-18 | 1991-12-24 | Avion Systems, Inc. | Airborne surveillance method and system |
US5027114A (en) | 1987-06-09 | 1991-06-25 | Kiroshi Kawashima | Ground guidance system for airplanes |
US5045861A (en) | 1987-08-10 | 1991-09-03 | The Lynxvale - Cril Partnership | Navigation and tracking system |
KR920010026B1 (en) | 1987-10-23 | 1992-11-13 | 휴우즈 에어크라프트 캄파니 | Vehicle location system accuracy enhancement for airborne vehicles |
US4914733A (en) | 1987-10-30 | 1990-04-03 | Allied-Signal, Inc. | Traffic advisory-instantaneous vertical speed display |
US4899296A (en) | 1987-11-13 | 1990-02-06 | Khattak Anwar S | Pavement distress survey system |
US4958306A (en) | 1988-01-06 | 1990-09-18 | Pacific Northwest Research & Development, Inc. | Pavement inspection apparatus |
FR2626677B1 (en) | 1988-02-01 | 1990-06-22 | Thomson Csf | RADIONAVIGATION SYSTEM |
EP0355336B1 (en) | 1988-08-04 | 1995-08-16 | Siemens-Albis Aktiengesellschaft | Radar system for position determination of two or more objects |
FR2881841A1 (en) | 1989-02-02 | 2006-08-11 | Thales Sa | Integrated optoelectronic and radar system for combat aircraft, has sensor with radar subassembly and optronic transceiver integrated to subassembly, where transceiver and subassembly are fixed to end of horizontal spars at opening plane |
US5144315A (en) | 1989-02-10 | 1992-09-01 | Cardion, Inc. | System for accurately monitoring aircraft position during training exercises |
CA2009344C (en) | 1989-02-10 | 1994-12-06 | Carl E. Schwab | System for accurately monitoring aircraft position during training exercises |
US5001650A (en) | 1989-04-10 | 1991-03-19 | Hughes Aircraft Company | Method and apparatus for search and tracking |
EP0412441B1 (en) | 1989-08-08 | 1995-01-11 | Siemens Aktiengesellschaft | Multifunctional radar |
US5081457A (en) | 1989-11-30 | 1992-01-14 | Honeywell Inc. | Apparatus for reducing synchronous fruit in tcas surveillance systems |
US5025382A (en) | 1989-12-12 | 1991-06-18 | The Mitre Corporation | Datalink controller interface |
US5260702A (en) | 1989-12-27 | 1993-11-09 | Thompson Keith P | Aircraft information system |
US5017930A (en) | 1990-01-25 | 1991-05-21 | John R. Stoltz | Precision landing system |
US5089822A (en) | 1990-02-13 | 1992-02-18 | Avion Systems, Inc. | Interrogation signal processor for air traffic control communications |
GB2241623A (en) | 1990-02-28 | 1991-09-04 | Philips Electronic Associated | Vehicle location system |
NL9001599A (en) | 1990-07-13 | 1992-02-03 | Frans Herman De Haan | DEVICE FOR LOCATING AND IDENTIFYING ANSWERS. |
US5265023A (en) | 1990-07-27 | 1993-11-23 | Mitre Corporation | Method for issuing adaptive ground delays to air traffic |
US5506590A (en) | 1990-08-13 | 1996-04-09 | Minter; Jerry B. | Pilot warning system |
US5153836A (en) | 1990-08-22 | 1992-10-06 | Edward J. Fraughton | Universal dynamic navigation, surveillance, emergency location, and collision avoidance system and method |
US5075680A (en) | 1990-09-14 | 1991-12-24 | Dabbs John W T | Method and apparatus for monitoring vehicular traffic |
WO1992005456A1 (en) | 1990-09-26 | 1992-04-02 | Rowe, Deines Instruments Incorporated | Acoustic doppler current profiler |
US5867804A (en) | 1993-09-07 | 1999-02-02 | Harold R. Pilley | Method and system for the control and management of a three dimensional space envelope |
US6195609B1 (en) | 1993-09-07 | 2001-02-27 | Harold Robert Pilley | Method and system for the control and management of an airport |
US5200902A (en) | 1990-10-09 | 1993-04-06 | Pilley Harold R | Airport control/management system |
DE59108501D1 (en) | 1990-11-28 | 1997-03-06 | Siemens Ag | Pulse Doppler radar |
DE4109981A1 (en) | 1991-03-27 | 1992-10-01 | Standard Elektrik Lorenz Ag | SECONDARY RADAR SYSTEM |
US5225842A (en) | 1991-05-09 | 1993-07-06 | Navsys Corporation | Vehicle tracking system employing global positioning system (gps) satellites |
DE4116667A1 (en) | 1991-05-22 | 1992-11-26 | Telefunken Systemtechnik | METHOD FOR DETECTING THE TRAFFIC SITUATION AND ARRANGEMENT FOR IMPLEMENTING THE METHOD |
US5365516A (en) | 1991-08-16 | 1994-11-15 | Pinpoint Communications, Inc. | Communication system and method for determining the location of a transponder unit |
US5614912A (en) | 1991-09-09 | 1997-03-25 | The Mitre Corporation | Radar processing method and apparatus |
US5138321A (en) | 1991-10-15 | 1992-08-11 | International Business Machines Corporation | Method for distributed data association and multi-target tracking |
US5379224A (en) | 1991-11-29 | 1995-01-03 | Navsys Corporation | GPS tracking system |
DE4143215A1 (en) | 1991-12-30 | 1993-07-01 | Deutsche Forsch Luft Raumfahrt | SYSTEM FOR LOCATING OBJECTS AND OBSTACLES, AND FOR DETECTING AND DETERMINING THE ROLLING STATE OF MOVING OBJECTS, SUCH AS AIRPLANES, GROUND VEHICLES AND THE LIKE. |
DE4204164C2 (en) | 1992-02-13 | 1994-09-08 | Deutsche Aerospace | Position and mission data device for flight navigation and flight data processing with GPS supported display |
JP3281015B2 (en) | 1992-02-18 | 2002-05-13 | 株式会社東芝 | Aircraft position monitoring system |
FR2688596B1 (en) | 1992-03-10 | 1994-04-29 | Thomson Csf | METHOD AND DEVICE FOR DETECTING PULSE MIXTURES RECEIVED BY A SECONDARY RADAR BY PHASE ANALYSIS. |
FR2689250B1 (en) | 1992-03-31 | 1994-05-13 | Thomson Csf | METHOD AND DEVICE FOR DETECTING MIXTURES OF PULSES RECEIVED BY A SECONDARY RADAR. |
US5402116A (en) | 1992-04-28 | 1995-03-28 | Hazeltine Corp. | Atmospheric pressure calibration systems and methods |
JPH0616888U (en) | 1992-06-12 | 1994-03-04 | 東京コスモス電機株式会社 | Fixed station for differential GPS, GPS positioning device for mobiles, navigation device, and radio receiver for GPS positioning device |
US5262784A (en) | 1992-06-15 | 1993-11-16 | Cardion, Inc. | System for monitoring aircraft position |
FR2692995B1 (en) | 1992-06-30 | 1994-08-26 | Thomson Csf | Pulse recognition method and device and use for filtering Mode S responses from a secondary radar. |
FR2692998B1 (en) | 1992-06-30 | 1994-08-26 | Thomson Csf | Method and device for improving the probability of validity of the secondary radar response codes. |
FR2693329B1 (en) | 1992-07-06 | 1994-09-09 | Sfp | Method and system for pointing two antennas towards each other. |
US5268698A (en) | 1992-07-31 | 1993-12-07 | Smith Sr Louis P | Target acquisition, locating and tracking system |
US5311194A (en) | 1992-09-15 | 1994-05-10 | Navsys Corporation | GPS precision approach and landing system for aircraft |
FR2697949B1 (en) | 1992-11-06 | 1995-01-06 | Thomson Csf | Antenna for radar, in particular for designation and trajectography. |
US5471657A (en) | 1992-12-04 | 1995-11-28 | Hughes Aircraft Company | Frequency tuning for satellite ground stations |
US5317316A (en) | 1992-12-22 | 1994-05-31 | Honeywell Inc. | Method of altitude track initialization in an aircraft tracking system |
IL104542A (en) | 1993-01-28 | 1996-05-14 | Israel State | Airborne obstacle collision avoidance apparatus |
CA2114610A1 (en) | 1993-02-26 | 1994-08-27 | Peter L. Hoover | Airport incursion avoidance system |
CA2114755A1 (en) | 1993-02-26 | 1994-08-27 | Peter L. Hoover | Airport surveillance system |
NL9300383A (en) | 1993-03-03 | 1994-10-03 | Hollandse Signaalapparaten Bv | Radar device. |
DE4306660C2 (en) | 1993-03-03 | 2000-09-21 | Daimler Chrysler Ag | System for locating and identifying vehicles on an airfield |
US6240345B1 (en) | 1993-04-15 | 2001-05-29 | Alliedsignal Inc. | Integrity monitor for TCAS mutual suppression |
AU6820694A (en) | 1993-05-07 | 1994-12-12 | Associated Rt, Inc. | System for locating a source of bursty transmissions |
US6314366B1 (en) | 1993-05-14 | 2001-11-06 | Tom S. Farmakis | Satellite based collision avoidance system |
US5714948A (en) | 1993-05-14 | 1998-02-03 | Worldwide Notifications Systems, Inc. | Satellite based aircraft traffic control system |
US5334982A (en) | 1993-05-27 | 1994-08-02 | Norden Systems, Inc. | Airport surface vehicle identification |
ZA944283B (en) | 1993-06-21 | 1995-02-10 | Armament Dev Authority | Gps-aided dead reckoning navigation |
FR2707400B1 (en) | 1993-07-09 | 1995-08-18 | Thomson Csf | Method for placing transactions over time, in particular between a secondary mode radar and airplanes. |
WO1995003598A1 (en) | 1993-07-20 | 1995-02-02 | Philip Bernard Wesby | Locating/map dissemination system |
FR2708349B1 (en) | 1993-07-26 | 1995-09-15 | Sextant Avionique | Method for locating an aircraft in flight using a satellite positioning system. |
US5374932A (en) | 1993-08-02 | 1994-12-20 | Massachusetts Institute Of Technology | Airport surface surveillance system |
US5339281A (en) | 1993-08-05 | 1994-08-16 | Alliant Techsystems Inc. | Compact deployable acoustic sensor |
US5438337A (en) | 1993-09-24 | 1995-08-01 | Northrop Grumman Corporation | Navigation system using re-transmitted GPS |
US5493309A (en) | 1993-09-24 | 1996-02-20 | Motorola, Inc. | Collison avoidance communication system and method |
US5570099A (en) | 1993-10-15 | 1996-10-29 | Loral Federal Systems Company | TDOA/FDOA technique for locating a transmitter |
US5424746A (en) | 1993-11-16 | 1995-06-13 | Cardion, Inc. | Method and system for monitoring vehicles |
US5959574A (en) | 1993-12-21 | 1999-09-28 | Colorado State University Research Foundation | Method and system for tracking multiple regional objects by multi-dimensional relaxation |
US5450329A (en) | 1993-12-22 | 1995-09-12 | Tanner; Jesse H. | Vehicle location method and system |
DE4403190C1 (en) | 1994-02-02 | 1995-07-27 | Deutsche Forsch Luft Raumfahrt | Determining position of aircraft |
US5459469A (en) | 1994-02-04 | 1995-10-17 | Stanford Telecommunications, Inc. | Air traffic surveillance and communication system |
CA2136570A1 (en) | 1994-02-04 | 1995-08-05 | Gary L. Viviani | Hybrid synthetic aircraft landing system |
ATE225519T1 (en) | 1994-03-11 | 2002-10-15 | Toshiba Kk | MONITORING SYSTEM FOR CONTROLLABLE TARGETS |
EP0681229B1 (en) | 1994-03-24 | 2000-05-24 | Hewlett-Packard Company | System for monitoring a procedure |
FR2717935B1 (en) | 1994-03-24 | 1996-05-31 | Sextant Avionique | Method and device for preventing collisions of aerodynes with obstacles in relief. |
US5570095A (en) | 1994-04-01 | 1996-10-29 | Massachusetts Institute Of Technology | Automatic dependent surveillance air navigation system |
WO1995028650A1 (en) | 1994-04-19 | 1995-10-26 | Northrop Grumman Corporation | Aircraft location and identification system |
EP0679906B1 (en) | 1994-04-22 | 1999-08-25 | Mitsubishi Precision Co., Ltd. | Apparatus for measuring physical quantities related to relative movement between two objects |
JP3442138B2 (en) | 1994-04-28 | 2003-09-02 | パイオニア株式会社 | Navigation device and method |
IT1269748B (en) | 1994-05-11 | 1997-04-15 | Alcatel Air Navigation Systems | PRECISION APPROACHING SYSTEM BETWEEN MOBILE VEHICLES AND EQUIPPED POINTS |
US5454720A (en) | 1994-05-31 | 1995-10-03 | Motorola, Inc. | Method for elimination of ambiguous solutions in a hyperbolic positioning system |
US5948040A (en) | 1994-06-24 | 1999-09-07 | Delorme Publishing Co. | Travel reservation information and planning system |
US5752216A (en) | 1994-07-06 | 1998-05-12 | Dimensions International, Inc. | Non-intrusive data interface system for air traffic control |
AU3359195A (en) | 1994-07-15 | 1996-02-16 | Worldwide Notification Systems, Inc. | Satellite based aircraft traffic control system |
US5680140A (en) | 1994-07-19 | 1997-10-21 | Trimble Navigation Limited | Post-processing of inverse differential corrections for SATPS mobile stations |
SE503679C2 (en) | 1994-11-18 | 1996-07-29 | Lasse Karlsen | Acoustic wind meter |
JPH08146130A (en) | 1994-11-24 | 1996-06-07 | Mitsubishi Electric Corp | Airport surface-ground running control system |
FR2728094A1 (en) | 1994-12-07 | 1996-06-14 | Dassault Electronique | DEVICE FOR DETECTION AND LOCATION OF OBJECTS ON THE GROUND |
FR2728374A1 (en) | 1994-12-15 | 1996-06-21 | Aerospatiale | METHOD AND APPARATUS FOR PROVIDING INFORMATION, ALERT, OR ALARM FOR AN AIRCRAFT NEAR THE GROUND |
JP3294726B2 (en) | 1994-12-20 | 2002-06-24 | 本田技研工業株式会社 | Radar equipment |
US5617101A (en) | 1994-12-27 | 1997-04-01 | Motorola, Inc. | Satellite-based geolocation calibration system and method |
US5781150A (en) | 1995-01-25 | 1998-07-14 | American Technology Corporation | GPS relative position detection system |
US5635693A (en) | 1995-02-02 | 1997-06-03 | International Business Machines Corporation | System and method for tracking vehicles in vehicle lots |
US5666110A (en) | 1995-03-09 | 1997-09-09 | Paterson; Noel S. | Helicopter enhanced descent after take-off warning for GPWS |
FI98412C (en) | 1995-03-13 | 1997-06-10 | Vaisala Oy | Code-free GPS positioning method and equipment for code-free positioning |
FR2731824B1 (en) | 1995-03-17 | 1997-05-16 | Sextant Avionique | COLLISION AVOIDANCE DEVICE FOR AIRCRAFT, PARTICULARLY WITH THE GROUND |
US5541608A (en) | 1995-03-29 | 1996-07-30 | Itt Corporation | Hybrid amplitude/phase comparison direction finding system |
US5528244A (en) | 1995-03-31 | 1996-06-18 | Cardion, Inc. | Processing for mode S signals suffering multipath distortion |
US5699275A (en) | 1995-04-12 | 1997-12-16 | Highwaymaster Communications, Inc. | System and method for remote patching of operating code located in a mobile unit |
US5694322A (en) | 1995-05-09 | 1997-12-02 | Highwaymaster Communications, Inc. | Method and apparatus for determining tax of a vehicle |
IL113676A (en) | 1995-05-09 | 1999-05-09 | El Ar Electronics Ltd | Airport surface detection radar |
EP0824785B1 (en) | 1995-05-11 | 1999-08-04 | Fernau Avionics Limited | Secondary surveillance radar |
US5629691A (en) | 1995-05-26 | 1997-05-13 | Hughes Electronics | Airport surface monitoring and runway incursion warning system |
FR2735240B1 (en) | 1995-06-06 | 1998-01-30 | Soc Et Rech Et Const Electroni | METHOD AND DEVICE FOR THE PRECISE DETERMINATION OF A MASK POINT BY SATELLITE RADIOLOCATION. |
US5608412A (en) | 1995-06-07 | 1997-03-04 | General Electric Company | Protocol and mechanism for mutter mode communication for stationary master tracking unit |
EP0750238B1 (en) | 1995-06-20 | 2000-03-01 | Honeywell Inc. | Integrated ground collision avoidance system |
DE69631750T2 (en) | 1995-07-17 | 2005-01-20 | The Nippon Signal Co., Ltd. | OBJECT DETECTION DEVICE |
US5596326A (en) | 1995-07-17 | 1997-01-21 | Northrop Grumman Corporation | Secondary surveillance radar interrogation system using dual frequencies |
US6292721B1 (en) | 1995-07-31 | 2001-09-18 | Allied Signal Inc. | Premature descent into terrain visual awareness enhancement to EGPWS |
US6691004B2 (en) | 1995-07-31 | 2004-02-10 | Honeywell International, Inc. | Method for determining a currently obtainable climb gradient of an aircraft |
US6092009A (en) | 1995-07-31 | 2000-07-18 | Alliedsignal | Aircraft terrain information system |
US6606034B1 (en) | 1995-07-31 | 2003-08-12 | Honeywell International Inc. | Terrain awareness system |
US6138060A (en) | 1995-07-31 | 2000-10-24 | Alliedsignal Inc. | Terrain awareness system |
US5839080B1 (en) | 1995-07-31 | 2000-10-17 | Allied Signal Inc | Terrain awareness system |
US5627546A (en) | 1995-09-05 | 1997-05-06 | Crow; Robert P. | Combined ground and satellite system for global aircraft surveillance guidance and navigation |
US5732384A (en) | 1995-09-08 | 1998-03-24 | Hughes Aircraft | Graphical user interface for air traffic control flight data management |
GB9519087D0 (en) | 1995-09-19 | 1995-11-22 | Cursor Positioning Sys Ltd | Navigation and tracking system |
FR2739695B1 (en) | 1995-10-06 | 1997-11-07 | Sextant Avionique | BROADBAND RECEIVER WITH DISTANCE MEASUREMENT BY PSEUDO-RANDOM CODE SIGNALS |
GB9520487D0 (en) | 1995-10-06 | 1995-12-06 | Cambridge Consultants | Short range electromagnetic sensor |
FR2741159B1 (en) | 1995-11-14 | 1998-01-23 | Centre Nat Etd Spatiales | GLOBAL SPATIAL RADIO-LOCATION AND RADIONAVIGATION SYSTEM, BEACON, AND RECEIVER USED IN SUCH A SYSTEM |
JP3401130B2 (en) | 1995-11-17 | 2003-04-28 | 富士通株式会社 | Flight strips management method and system |
FR2741956B1 (en) | 1995-12-05 | 1998-01-02 | Thomson Csf | SYSTEM AND METHOD FOR REGULATING THE NUMBER OF PLOTS TO BE PROCESSED IN A RADAR |
US5774829A (en) | 1995-12-12 | 1998-06-30 | Pinterra Corporation | Navigation and positioning system and method using uncoordinated beacon signals in conjunction with an absolute positioning system |
WO1997022890A1 (en) | 1995-12-19 | 1997-06-26 | Siemens Schweiz Ag | Process and amplitude or phase-single pulse radar device for locating flying objects |
US5659319A (en) | 1995-12-21 | 1997-08-19 | Cardion, Inc. | Method and apparatus for operating a surface detection surveillance radar using frequency agile pulse transmissions |
DE19602053A1 (en) | 1996-01-20 | 1997-07-24 | Ruediger Klaschka | Device for monitoring the distance between two objects |
JP2743905B2 (en) | 1996-02-28 | 1998-04-28 | 日本電気株式会社 | Monitoring space passage detection device |
PT883873E (en) | 1996-02-29 | 2000-06-30 | Siemens Ag | CONTROL AND CONDUCTION SYSTEM FOR SURFACE MOVEMENTS AT AIRPORTS |
US6275172B1 (en) | 1996-02-29 | 2001-08-14 | L-3 Communications Corporation | Method and apparatus for improving performance of aircraft display utilizing TCAS computer and mode S transponder |
DE69636291T2 (en) | 1996-03-14 | 2007-06-14 | T-Mobile Deutschland Gmbh | Telematics terminal for road traffic applications |
EP0987562B1 (en) | 1996-04-23 | 2006-07-12 | Honeywell International Inc. | Integrated hazard avoidance system |
DE69736333T2 (en) | 1996-04-23 | 2007-07-19 | Honeywell International Inc. | Integrated danger avoidance system |
JPH09297030A (en) | 1996-05-02 | 1997-11-18 | Pioneer Electron Corp | Method and device for calculating moving body position, and method and device for correcting moving body position |
DE19619015B4 (en) | 1996-05-10 | 2006-11-02 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Method and arrangement for traffic monitoring |
US5872526A (en) | 1996-05-23 | 1999-02-16 | Sun Microsystems, Inc. | GPS collision avoidance system |
WO1997047173A2 (en) | 1996-06-03 | 1997-12-18 | Mcdonnell Douglas Helicopter Company | Portable flight guidance and tracking system |
FR2751087B1 (en) | 1996-07-09 | 1998-11-06 | Thomson Csf | TARGET DETECTION METHOD AND DEVICE FOR NON-AMBIGUOUS BROADBAND PULSE DOPPLER RADAR |
AU3618497A (en) | 1996-08-01 | 1998-02-25 | Era A.S. | A process for location of objects, mainly aircraft, and a system for carrying out this process |
DE19635679A1 (en) | 1996-09-03 | 1998-03-05 | Siemens Ag | Man-machine interface (MMI) for airports and air traffic purposes |
US7903029B2 (en) | 1996-09-09 | 2011-03-08 | Tracbeam Llc | Wireless location routing applications and architecture therefor |
US5890068A (en) | 1996-10-03 | 1999-03-30 | Cell-Loc Inc. | Wireless location system |
ATE257265T1 (en) | 1996-10-04 | 2004-01-15 | Arrivalstar Inc | SYSTEM FOR ANNOUNCEMENT OF ARRIVAL TIME OF TRANSPORT VEHICLES |
EP1396832A1 (en) | 1996-10-04 | 2004-03-10 | Arrivalstar, Inc. | Notification method and system for use with vehicular transport |
EP1406228A3 (en) | 1996-10-04 | 2006-10-11 | Arrivalstar, Inc. | Method and system for a notification system for use with vehicular transport |
DE19646954B4 (en) | 1996-11-13 | 2006-09-21 | T-Mobile Deutschland Gmbh | Method and device for controlling a fleet of land and / or water vehicles |
SE507796C2 (en) | 1996-11-15 | 1998-07-13 | Ericsson Telefon Ab L M | Procedures and systems for data reduction of the arrival times of radar signals. |
EP0939946A1 (en) | 1996-11-15 | 1999-09-08 | Siemens Aktiengesellschaft | Terminal co-ordination system for airports |
US5841398A (en) | 1996-11-20 | 1998-11-24 | Space Systems/Loral, Inc. | Integrated navigation and communication satellite system |
DE69633255T2 (en) | 1996-11-22 | 2005-09-22 | ITT Manufacturing Enterprises, Inc., Wilmington | INTEGRATED DISPLAY FOR PRECISION APPROACHING RADAR |
US5828333A (en) | 1997-01-21 | 1998-10-27 | Northrop Grumman Corporation | Multiple access diplex doppler radar |
US6091358A (en) | 1997-01-31 | 2000-07-18 | Trimble Navigation Limited | Integrated position determination system with radio relay |
US5969674A (en) | 1997-02-21 | 1999-10-19 | Von Der Embse; Urban A. | Method and system for determining a position of a target vehicle utilizing two-way ranging |
US6377208B2 (en) | 1997-02-21 | 2002-04-23 | Hughes Electronics Corporation | Method and system for determining a position of a transceiver unit utilizing two-way ranging in a polystatic satellite configuration |
DE69830936T2 (en) | 1997-02-21 | 2006-04-20 | Hughes Electronics Corp., El Segundo | Method and device for determining the position of the transceiver system by means of two-way distance determination in a polystatic satellite configuration with ground radar |
FR2760849B1 (en) | 1997-03-13 | 1999-04-16 | Alsthom Cge Alcatel | TRANSPONDER LOCATION SYSTEM FOR HIGHWAY TELEPHONE INSTALLATION |
DE19711467C2 (en) | 1997-03-20 | 2000-12-07 | Mannesmann Vdo Ag | Method for determining the vertical distance between an object and a locally changing device |
US5920318A (en) | 1997-03-26 | 1999-07-06 | Northrop Grumman Corporation | Method and apparatus for localizing an object within a sector of a physical surface |
DE69818813D1 (en) | 1997-03-27 | 2003-11-13 | Innovative Solutions & Support | CALIBRATION METHOD OF HIGH SENSORS FOR AIRCRAFT |
GB2332052B (en) | 1997-12-04 | 2002-01-16 | Olivetti Res Ltd | Detection system for determining orientation information about objects |
GB2332053B (en) | 1997-12-04 | 2002-01-09 | Olivetti Res Ltd | Detection system for determinning positional and other information about objects |
IL120729A0 (en) | 1997-04-25 | 1997-08-14 | Erel D | A system for invoicing car parking |
DE19721142A1 (en) | 1997-05-21 | 1998-11-26 | Kalle Nalo Gmbh | Multi-layer, biaxially stretched food casing with two oxygen barrier layers |
JP2892336B2 (en) | 1997-06-09 | 1999-05-17 | 運輸省船舶技術研究所長 | Runway reservation system |
US6043777A (en) | 1997-06-10 | 2000-03-28 | Raytheon Aircraft Company | Method and apparatus for global positioning system based cooperative location system |
US5841391A (en) | 1997-06-11 | 1998-11-24 | Itt Manufacturing Enterprises, Inc. | Combined air surveillance and precision approach radar system |
US5991687A (en) | 1997-07-02 | 1999-11-23 | Case Corporation | System and method for communicating information related to a geographical area |
US6049304A (en) | 1997-07-10 | 2000-04-11 | Rannoch Corporation | Method and apparatus for improving the accuracy of relative position estimates in a satellite-based navigation system |
US6085150A (en) | 1997-07-22 | 2000-07-04 | Rockwell Collins, Inc. | Traffic collision avoidance system |
US6161097A (en) | 1997-08-11 | 2000-12-12 | The United Sates Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Automated traffic management system and method |
SE510543C2 (en) | 1997-09-26 | 1999-05-31 | Ericsson Telefon Ab L M | Procedure for associating between target sequences and using the procedure in a radar |
US5923293A (en) | 1997-09-30 | 1999-07-13 | Honeywell Inc. | Method and apparatus for accomplishing extended range TCAS using a dual bandwidth receiver |
GB9722068D0 (en) | 1997-10-17 | 1997-12-17 | Secretary Trade Ind Brit | Tracking system |
DE19749461A1 (en) | 1997-11-10 | 1999-05-27 | Deutsch Zentr Luft & Raumfahrt | Radar antenna |
DE19751092C2 (en) | 1997-11-18 | 2000-02-10 | Siemens Ag | Communication system and information transmission method for vehicles |
US6081764A (en) | 1997-12-15 | 2000-06-27 | Raytheon Company | Air traffic control system |
AUPP107597A0 (en) | 1997-12-22 | 1998-01-22 | Commonwealth Scientific And Industrial Research Organisation | Road pavement deterioration inspection system |
FR2773039B1 (en) | 1997-12-23 | 2000-03-17 | Thomson Csf | METHOD OF SPATIO-TEMPORAL LOCATION OF RADIO-MOBILES IN URBAN AREAS |
US6133867A (en) | 1998-01-02 | 2000-10-17 | Eberwine; David Brent | Integrated air traffic management and collision avoidance system |
US6462697B1 (en) | 1998-01-09 | 2002-10-08 | Orincon Technologies, Inc. | System and method for classifying and tracking aircraft vehicles on the grounds of an airport |
US6201499B1 (en) | 1998-02-03 | 2001-03-13 | Consair Communications | Time difference of arrival measurement system |
JP3910291B2 (en) | 1998-02-16 | 2007-04-25 | 本田技研工業株式会社 | In-vehicle radar system |
DE19806450A1 (en) | 1998-02-17 | 1999-08-26 | Deutsch Zentr Luft & Raumfahrt | Method for monitoring airports, sea ports or other action region |
US6327471B1 (en) | 1998-02-19 | 2001-12-04 | Conexant Systems, Inc. | Method and an apparatus for positioning system assisted cellular radiotelephone handoff and dropoff |
AU2898799A (en) | 1998-03-06 | 1999-09-20 | Mobile Information System, Inc. | Fleet management system and method |
US6353412B1 (en) | 1998-03-17 | 2002-03-05 | Qualcomm, Incorporated | Method and apparatus for determining position location using reduced number of GPS satellites and synchronized and unsynchronized base stations |
US6049754A (en) | 1998-03-31 | 2000-04-11 | The Mitre Corporation | Method for displaying vehicle arrival management information |
WO1999056144A1 (en) | 1998-04-28 | 1999-11-04 | Snaptrack, Inc. | Method and apparatus for providing location-based information via a computer network |
US6230018B1 (en) | 1998-05-14 | 2001-05-08 | Nortel Networks Limited | Devices and processing in a mobile radio communication network having calibration terminals |
US6081222A (en) | 1998-05-26 | 2000-06-27 | Northrop Grumman Corporation | Joint surveillance target attack system combat transponder |
FR2779831B1 (en) | 1998-06-12 | 2000-09-01 | Thomson Csf | METHOD FOR INCREASING THE ANGULAR COVERAGE OF BEAM-FORMING RADARS, AND RADAR USING THE SAME |
US6208284B1 (en) | 1998-06-16 | 2001-03-27 | Rockwell Science Center, Inc. | Radar augmented TCAS |
DE19826737A1 (en) | 1998-06-16 | 1999-12-23 | Jens Rainer Schuessler | Collision warning method for aircraft |
DE69933932T2 (en) | 1998-07-06 | 2007-09-06 | Honeywell International Inc. | VERIFICATION OF THE VALIDITY OF THE POSITION OF A PLANE UNDER THE AID OF RADAR AND DIGITAL TERRAIN HEIGHT DATA |
US6448929B1 (en) | 1998-07-14 | 2002-09-10 | Rannoch Corporation | Method and apparatus for correlating flight identification data with secondary surveillance radar data |
US5999116A (en) | 1998-07-14 | 1999-12-07 | Rannoch Corporation | Method and apparatus for improving the surveillance coverage and target identification in a radar based surveillance system |
US6384783B1 (en) | 1998-07-14 | 2002-05-07 | Rannoch Corporation | Method and apparatus for correlating flight identification data with secondary surveillance |
BR9912447A (en) | 1998-07-27 | 2001-04-17 | Ericsson Telefon Ab L M | Processes for using an arrival time measuring device, for determining a base time difference between the arrival time measuring units and for locating the position of a mobile communication station on a wireless communication network, and, apparatus for use in locating a mobile station on a wireless network and the position of a mobile station on a wireless network |
US6522887B2 (en) | 1998-07-27 | 2003-02-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Identifying starting time for making time of arrival measurements |
US6208937B1 (en) | 1998-07-29 | 2001-03-27 | Litton Systems Inc. | Method and apparatus for generating navigation data |
US6584414B1 (en) | 1998-08-28 | 2003-06-24 | Harold C. Green | Parking lot pavement analysis system |
AU754932B2 (en) | 1998-09-03 | 2002-11-28 | Wherenet Corp. | Network for multi-lateration with circularly polarized antenna |
FR2783912B1 (en) | 1998-09-24 | 2001-01-12 | Dassault Electronique | LANDING ASSISTANCE DEVICE, PARTICULARLY FOR INHIBITING GROUND ANTI-COLLISION ALERT |
US6188937B1 (en) | 1998-09-30 | 2001-02-13 | Honeywell International Inc. | Methods and apparatus for annunciation of vehicle operational modes |
WO2000022595A1 (en) | 1998-10-13 | 2000-04-20 | Integrated Systems Research Corporation | System and method for fleet tracking |
FR2785112B1 (en) | 1998-10-21 | 2001-04-13 | Dassault Electronique | EMBEDDED BEACON, PARTICULARLY FOR THE MANAGEMENT OF VEHICLE FLEETS |
JP3041278B1 (en) | 1998-10-30 | 2000-05-15 | 運輸省船舶技術研究所長 | Passive SSR device |
JP2991710B1 (en) | 1998-10-30 | 1999-12-20 | 運輸省船舶技術研究所長 | SSR device and aircraft secondary monitoring network |
US6236652B1 (en) | 1998-11-02 | 2001-05-22 | Airbiquity Inc. | Geo-spacial Internet protocol addressing |
US6094169A (en) | 1998-12-11 | 2000-07-25 | Rannoch Corporation | Multilateration auto-calibration and position error correction |
FR2787269B1 (en) | 1998-12-11 | 2001-03-02 | Aerospatiale | METHOD FOR IMPLEMENTING AN AIR TRAFFIC SERVICE UNIT |
US6178363B1 (en) | 1998-12-22 | 2001-01-23 | The Boeing Company | Inertially augmented GPS landing system |
FR2787907B1 (en) | 1998-12-23 | 2001-03-16 | Sextant Avionique | AID SYSTEM FOR AVOIDING AIRCRAFT COLLISIONS WITH THE GROUND |
US6271768B1 (en) | 1998-12-30 | 2001-08-07 | Honeywell Inc. | Vertical speed indicator/traffic resolution advisory display for TCAS |
US6459411B2 (en) | 1998-12-30 | 2002-10-01 | L-3 Communications Corporation | Close/intra-formation positioning collision avoidance system and method |
US6690296B2 (en) | 1998-12-31 | 2004-02-10 | Honeywell Inc. | Airborne alerting system |
IT1306761B1 (en) | 1999-01-21 | 2001-10-02 | Associazione Vito Volterra | LANDING AID SYSTEM. |
WO2000047948A1 (en) | 1999-02-01 | 2000-08-17 | Honeywell International Inc. | Apparatus, method, and computer program product for generating terrain clearance floor envelopes about a selected runway |
WO2000048159A2 (en) | 1999-02-01 | 2000-08-17 | Honeywell International Inc. | Apparatus, methods and computer program product for the generation and use of a runway field clearance floor envelope about a selected runway |
DE60030413T2 (en) | 1999-02-01 | 2007-09-13 | Honeywell International Inc. | A method, apparatus and computer program products for determining a corrected distance between an aircraft and a selected runway |
WO2000045126A1 (en) | 1999-02-01 | 2000-08-03 | Honeywell International Inc. | Ground proximity warning system |
JP2002536739A (en) | 1999-02-05 | 2002-10-29 | ブレット・ホール | Parking lot facility computer management system |
DE19904842A1 (en) | 1999-02-08 | 2000-08-10 | Airsys Navigation Systems Gmbh | Surveillance system for terrestrial navigation and airport landing systems |
EP1155340B1 (en) | 1999-02-18 | 2003-08-13 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Monopulse phased array system |
FR2790098B1 (en) | 1999-02-23 | 2001-05-11 | Thomson Csf | METHOD FOR LOCATING TERRESTRIAL MOBILE RADIOS FROM AN AIRCRAFT |
US7477193B2 (en) | 1999-03-05 | 2009-01-13 | Era Systems Corporation | Method and system for elliptical-based surveillance |
US6992626B2 (en) | 1999-03-05 | 2006-01-31 | Rannoch Corporation | Method and apparatus to correlate aircraft flight tracks and events with relevant airport operations information |
US7495612B2 (en) | 1999-03-05 | 2009-02-24 | Era Systems Corporation | Method and apparatus to improve ADS-B security |
US7777675B2 (en) | 1999-03-05 | 2010-08-17 | Era Systems Corporation | Deployable passive broadband aircraft tracking |
US6812890B2 (en) | 2000-02-29 | 2004-11-02 | Rannoch Corporation | Voice recognition landing fee billing system |
US7782256B2 (en) | 1999-03-05 | 2010-08-24 | Era Systems Corporation | Enhanced passive coherent location techniques to track and identify UAVs, UCAVs, MAVs, and other objects |
US7576695B2 (en) | 1999-03-05 | 2009-08-18 | Era Systems Corporation | Multilateration enhancements for noise and operations management |
US6633259B1 (en) | 1999-03-05 | 2003-10-14 | Rannuch Corporation | Method and apparatus for improving utility of automatic dependent surveillance |
US7375683B2 (en) | 1999-03-05 | 2008-05-20 | Era Systems Corporation | Use of geo-stationary satellites to augment wide— area multilateration synchronization |
US7570214B2 (en) | 1999-03-05 | 2009-08-04 | Era Systems, Inc. | Method and apparatus for ADS-B validation, active and passive multilateration, and elliptical surviellance |
US6885340B2 (en) | 2000-02-29 | 2005-04-26 | Rannoch Corporation | Correlation of flight track data with other data sources |
US7126534B2 (en) | 1999-03-05 | 2006-10-24 | Rannoch Corporation | Minimum safe altitude warning |
US8203486B1 (en) | 1999-03-05 | 2012-06-19 | Omnipol A.S. | Transmitter independent techniques to extend the performance of passive coherent location |
US8446321B2 (en) | 1999-03-05 | 2013-05-21 | Omnipol A.S. | Deployable intelligence and tracking system for homeland security and search and rescue |
US6920309B1 (en) | 1999-03-18 | 2005-07-19 | The Directv Group, Inc. | User positioning technique for multi-platform communication system |
US6313783B1 (en) | 1999-03-24 | 2001-11-06 | Honeywell International, Inc. | Transponder having directional antennas |
US6222480B1 (en) | 1999-03-24 | 2001-04-24 | Alliedsignal | Multifunction aircraft transponder |
US6262679B1 (en) | 1999-04-08 | 2001-07-17 | Honeywell International Inc. | Midair collision avoidance system |
AUPP965299A0 (en) | 1999-04-08 | 1999-04-29 | Airservices Australia | Air traffic management system |
US6789011B2 (en) | 1999-04-16 | 2004-09-07 | R. Michael Baiada | Method and system for allocating aircraft arrival/departure slot times |
US6463383B1 (en) | 1999-04-16 | 2002-10-08 | R. Michael Baiada | Method and system for aircraft flow management by airlines/aviation authorities |
KR100526918B1 (en) | 1999-04-28 | 2005-11-09 | 도요타지도샤가부시키가이샤 | Accounting System |
US6301545B1 (en) | 1999-04-30 | 2001-10-09 | Sirf Technology, Inc. | Global positioning system tag system |
GB2350003A (en) | 1999-05-14 | 2000-11-15 | Roke Manor Research | Locating transmitter |
US6380869B1 (en) | 1999-05-19 | 2002-04-30 | Potomac Aviation Technology Corporation | Automated air-traffic advisory system and method |
NL1013556C2 (en) | 1999-07-26 | 2001-01-29 | Robertus Gerardus De Boer | Device for determining the position of vehicles at an airport. |
US6321091B1 (en) | 1999-07-29 | 2001-11-20 | Bryan Holland | Portable locator system and method |
US6225942B1 (en) | 1999-07-30 | 2001-05-01 | Litton Systems, Inc. | Registration method for multiple sensor radar |
US6314361B1 (en) | 1999-07-30 | 2001-11-06 | Caleb Technologies Corp. | Optimization engine for flight assignment, scheduling and routing of aircraft in response to irregular operations |
US6420993B1 (en) | 1999-08-24 | 2002-07-16 | Raytheon Company | Air traffic control system |
US6311127B1 (en) | 1999-09-02 | 2001-10-30 | Rockwell Collins | Satellite navigation system having redundant signal processing and matched filtering |
EP1218694B1 (en) | 1999-09-16 | 2006-11-15 | Sirf Technology, Inc. | Navigation system and method for tracking the position of an object |
US6469664B1 (en) | 1999-10-05 | 2002-10-22 | Honeywell International Inc. | Method, apparatus, and computer program products for alerting surface vessels to hazardous conditions |
US6329947B2 (en) | 1999-10-12 | 2001-12-11 | Mark D. Smith | System for processing directional signals |
JP4115638B2 (en) | 1999-10-19 | 2008-07-09 | 本田技研工業株式会社 | Object recognition device |
US6690618B2 (en) | 2001-04-03 | 2004-02-10 | Canesta, Inc. | Method and apparatus for approximating a source position of a sound-causing event for determining an input used in operating an electronic device |
US7535404B2 (en) | 1999-11-25 | 2009-05-19 | Nigel Corrigan | Airport safety system |
US6289280B1 (en) | 1999-12-10 | 2001-09-11 | Qualcomm Incorporated | Method and apparatus for determining an algebraic solution to GPS terrestrial hybrid location system equations |
JP2001166025A (en) | 1999-12-14 | 2001-06-22 | Matsushita Electric Ind Co Ltd | Sound source direction estimating method, sound collection method and device |
US6611755B1 (en) | 1999-12-19 | 2003-08-26 | Trimble Navigation Ltd. | Vehicle tracking, communication and fleet management system |
RU2158963C1 (en) | 1999-12-21 | 2000-11-10 | Закрытое акционерное общество "ИСТ ЛАЙН-ХЭНДЛИНГ" | Method of operational tracking and control of ground airport transport facilities |
US6393359B1 (en) | 1999-12-22 | 2002-05-21 | Rlm Software, Inc. | System and method for estimating aircraft flight delay |
US6580998B2 (en) | 1999-12-22 | 2003-06-17 | Rlm Software, Inc. | System and method for estimating aircraft flight delay |
EP1632892A3 (en) | 1999-12-22 | 2006-04-19 | Rlm Software, Inc. | System and method for estimating aircraft flight delay |
WO2001048652A1 (en) | 1999-12-23 | 2001-07-05 | Encos Ltd | System and method for computerised monitoring of information |
FR2791778B1 (en) | 1999-12-23 | 2006-07-21 | Cit Alcatel | ON-VEHICLE DEVICE AND CENTRAL DEVICE FOR PRECISIONLY LOCATING THIS VEHICLE |
US6338011B1 (en) | 2000-01-11 | 2002-01-08 | Solipsys Corporation | Method and apparatus for sharing vehicle telemetry data among a plurality of users over a communications network |
GB2361545A (en) | 2000-01-27 | 2001-10-24 | Trafficmaster Developments Ltd | Traffic monitoring |
US7215785B1 (en) | 2000-02-03 | 2007-05-08 | Sang Gyu Ju | Passive sound telemetry system and method and operating toy using the same |
EP1345044A1 (en) | 2000-02-08 | 2003-09-17 | Cambridge Consultants Limited | Methods and apparatus for obtaining positional information |
US6510381B2 (en) | 2000-02-11 | 2003-01-21 | Thomas L. Grounds | Vehicle mounted device and a method for transmitting vehicle position data to a network-based server |
AU2001239823A1 (en) | 2000-02-23 | 2001-09-03 | Steve C. Lampe | Synchronized global positioning system solution |
SE515873C2 (en) | 2000-03-01 | 2001-10-22 | Saab Ab | A transponder device |
JP3698004B2 (en) | 2000-03-15 | 2005-09-21 | 株式会社デンソー | Mobile radio communication device used in automatic toll collection system |
GB0006893D0 (en) | 2000-03-23 | 2000-12-20 | Secr Defence | Localisation of a signal emitting source |
US6388612B1 (en) | 2000-03-26 | 2002-05-14 | Timothy J Neher | Global cellular position tracking device |
US20030152248A1 (en) | 2000-04-11 | 2003-08-14 | Spark Peter Edmunds | Self calibration of an array of imaging sensors |
US6469660B1 (en) | 2000-04-13 | 2002-10-22 | United Parcel Service Inc | Method and system for displaying target icons correlated to target data integrity |
US6462674B2 (en) | 2000-04-18 | 2002-10-08 | Mazda Motor Corporation | Communication apparatus and its current position communication method, navigation apparatus for a vehicle and its information communication method, computer program product, and computer-readable storage medium |
KR100791239B1 (en) | 2000-04-24 | 2008-01-03 | 록히드 마틴 코포레이션 | Passive coherent location system and method |
US6469654B1 (en) | 2000-05-09 | 2002-10-22 | Advanced Navigation & Positioning Corp. | Transponder landing system |
AU2001263012A1 (en) | 2000-05-09 | 2001-11-20 | Advanced Navigation & Positioning Corporation | Vehicle surveillance system |
GB0013722D0 (en) | 2000-06-07 | 2001-03-14 | Secr Defence | Adaptive GPS and INS integration system |
FR2810146A1 (en) | 2000-06-09 | 2001-12-14 | Thomson Csf | Air traffic collision avoidance system includes adjustment to flight path, aiming at tangent to protective circle around threatened aircraft |
US6366240B1 (en) | 2000-06-14 | 2002-04-02 | L-3 Communications Corporation | Location of aircraft with time difference of arrival |
JP2002008189A (en) | 2000-06-22 | 2002-01-11 | Matsushita Electric Ind Co Ltd | Vehicle detector and vehicle detection method |
US6882930B2 (en) | 2000-06-26 | 2005-04-19 | Stratech Systems Limited | Method and system for providing traffic and related information |
US7043355B2 (en) | 2000-07-10 | 2006-05-09 | Garmin At, Inc. | Multisource target correlation |
US6542810B2 (en) | 2000-07-10 | 2003-04-01 | United Parcel Service Of America, Inc. | Multisource target correlation |
US6792058B1 (en) | 2000-07-12 | 2004-09-14 | Lockheed Martin Corporation | Digital receiving system for dense environment of aircraft |
WO2002008784A1 (en) | 2000-07-20 | 2002-01-31 | Adsi, Inc. | Hybrid surveillance device and method |
GB0017989D0 (en) | 2000-07-24 | 2001-08-08 | Secr Defence | Target recognition system |
US6823188B1 (en) | 2000-07-26 | 2004-11-23 | International Business Machines Corporation | Automated proximity notification |
US6556899B1 (en) | 2000-08-17 | 2003-04-29 | New Flyer Industries | Bus diagnostic and control system and method |
US6445927B1 (en) | 2000-09-18 | 2002-09-03 | Motorola, Inc. | Method and apparatus for calibrating base station locations and perceived time bias offsets in an assisted GPS transceiver |
US6408233B1 (en) | 2000-09-18 | 2002-06-18 | Axiom Navigation, Inc. | GPS data logger with automatic wireless download |
US20020063225A1 (en) | 2000-09-27 | 2002-05-30 | Payton David W. | Distributed sensing apparatus and method of use therefor |
KR20030045085A (en) | 2000-09-29 | 2003-06-09 | 아이신 세키 가부시키가이샤 | Monitoring system for vehicle automatic accounting device |
EP1326212B1 (en) | 2000-09-29 | 2006-09-27 | Toyota Jidosha Kabushiki Kaisha | Position recognizing device and position recognizing method, and accounting device and accounting method |
EP1333405A4 (en) | 2000-09-29 | 2007-03-28 | Aisin Seiki | Vehicle collected fee distributing system |
CA2393094C (en) | 2000-10-02 | 2009-04-07 | Chubu Electric Power Co., Inc. | Sound source locating system |
US6253147B1 (en) | 2000-10-04 | 2001-06-26 | Caleb Technologies Corp. | Real time tertiary operation for resolving irregularities in aircraft operations |
EP1327158A2 (en) | 2000-10-17 | 2003-07-16 | United Parcel Service Of America, Inc. | Integrated datalinks in a surveillance receiver |
FR2815792B1 (en) | 2000-10-20 | 2003-01-31 | Thomson Csf | MOBILE TRACKING SYSTEM |
NL1016511C2 (en) | 2000-10-31 | 2002-05-02 | Arcadis Bouw Infra B V | Traffic management system. |
FR2816703B1 (en) | 2000-11-10 | 2003-01-31 | Thomson Csf | INERTIAL NAVIGATION CENTER COMPRISING AN INTEGRATED GPS RECEIVER |
WO2002046701A2 (en) | 2000-12-08 | 2002-06-13 | The Johns Hopkins University | Wireless multi-functional sensor platform and method for its use |
US20020198001A1 (en) | 2000-12-27 | 2002-12-26 | Sundeep Bajikar | Method and apparatus for an independent positioning system and augmentation of GPS |
WO2002054103A2 (en) | 2001-01-05 | 2002-07-11 | Netstar (Proprietary) Limited | Object tracking system |
US6563432B1 (en) | 2001-01-12 | 2003-05-13 | Safegate International Ab | Aircraft docking system and method with automatic checking of apron and detection of fog or snow |
IL156675A0 (en) | 2001-01-26 | 2004-01-04 | Raytheon Co | Vehicle trip determination system and method |
US6553307B2 (en) | 2001-02-07 | 2003-04-22 | Richard L Stratton | Airport ground-control system and method |
US6559776B2 (en) | 2001-02-15 | 2003-05-06 | Yoram Katz | Parking status control system and method |
WO2002069300A1 (en) | 2001-02-22 | 2002-09-06 | Koyo Musen America, Inc. | Collecting, analyzing, consolidating, delivering and utilizing data relating to a current event |
US6542809B2 (en) | 2001-02-26 | 2003-04-01 | Honeywell International Inc. | Method and system for displaying target vehicle position information |
US7587278B2 (en) | 2002-05-15 | 2009-09-08 | Honeywell International Inc. | Ground operations and advanced runway awareness and advisory system |
US7117089B2 (en) | 2001-03-06 | 2006-10-03 | Honeywell International Inc. | Ground runway awareness and advisory system |
US6606563B2 (en) | 2001-03-06 | 2003-08-12 | Honeywell International Inc. | Incursion alerting system |
CA2441326A1 (en) | 2001-03-19 | 2002-09-26 | Micrologic Inc. | A system for remote vehicle tracking |
ITRM20010176A1 (en) | 2001-04-03 | 2002-10-03 | Univ Roma | RECEIVING AND PROCESSING APPARATUS FOR "REPLICA" SIGNALS OF SECONDARY SURVEILLANCE RADAR WITH SUPER RESOLUTION CAPACITY. |
US6473694B1 (en) | 2001-04-06 | 2002-10-29 | Nokia Corporation | Method, apparatus and system for estimating user position with a satellite positioning system in poor signal conditions |
US6584400B2 (en) | 2001-04-09 | 2003-06-24 | Louis J C Beardsworth | Schedule activated management system for optimizing aircraft arrivals at congested airports |
JP2002311123A (en) | 2001-04-11 | 2002-10-23 | Mitsui & Co Ltd | Satellite position measuring system |
US6414629B1 (en) | 2001-04-19 | 2002-07-02 | Tektrack, Llc | Tracking device |
US6792340B2 (en) | 2001-05-01 | 2004-09-14 | Ronald Dunsky | Apparatus and method for providing live display of aircraft flight information |
WO2002091017A2 (en) | 2001-05-04 | 2002-11-14 | Lockheed Martin Corporation | System and method for measurement domain data association in passive coherent location applications |
ITTO20010431A1 (en) | 2001-05-08 | 2002-11-08 | Bruno Ricco' | TELEMATIC SYSTEM AND PURCHASE METHOD OF A PERFORMANCE AUTHORIZATION. |
US6473027B1 (en) | 2001-05-15 | 2002-10-29 | Northrop Grumman Corporation | False reflected target elimination and automatic reflector mapping in secondary surveillance radar |
JP2002342645A (en) | 2001-05-15 | 2002-11-29 | Ntt Docomo Inc | Device, method and program for providing aircraft flight information and computer readable recording medium |
US6920390B2 (en) | 2001-05-18 | 2005-07-19 | Technology Planning Incorporated | Surface traffic movement system and method |
IL143414A0 (en) | 2001-05-23 | 2004-06-20 | Rafael Armament Dev Authority | A method and system for improving situational awareness of command and control units |
GB2377123B (en) | 2001-05-31 | 2004-09-01 | Telecom Consultants Internat L | Efficient transmission and storage of location data |
WO2002101666A1 (en) | 2001-06-13 | 2002-12-19 | Loop S.P.A. | Apparatus and method for evaluating a charge for the use of a vehicle |
US6492932B1 (en) | 2001-06-13 | 2002-12-10 | Raytheon Company | System and method for processing squint mapped synthetic aperture radar data |
US6571155B2 (en) | 2001-07-02 | 2003-05-27 | The Boeing Company | Assembly, computer program product and method for displaying navigation performance based flight path deviation information |
EP1603098B1 (en) | 2001-07-06 | 2007-01-24 | L-3 Communications Avionics Systems, Inc. | System and method for producing flight pathway |
CA2453043A1 (en) | 2001-07-06 | 2003-01-16 | Goodrich Avionics Systems, Inc. | System and method for producing flight pathway |
EP1275975B1 (en) | 2001-07-09 | 2006-06-07 | Itt Manufacturing Enterprises, Inc. | Quadrature multi-frequency ranging (QMFR) applied to GPS multipath mitigation |
JP4901027B2 (en) | 2001-07-12 | 2012-03-21 | 日立建機株式会社 | Construction machine position confirmation method, position display system, and construction machine |
US6876859B2 (en) | 2001-07-18 | 2005-04-05 | Trueposition, Inc. | Method for estimating TDOA and FDOA in a wireless location system |
US6744396B2 (en) | 2001-07-20 | 2004-06-01 | Aviation Communication & Surveillance Systems Llc | Surveillance and collision avoidance system with compound symbols |
US6657578B2 (en) | 2001-07-20 | 2003-12-02 | Aviation Communication & Surveillance Systems, Llc | Formation surveillance and collision avoidance |
US6683562B2 (en) | 2001-07-20 | 2004-01-27 | Aviation Communications & Surveillance Systems, Llc | Integrated surveillance display |
KR20030010982A (en) | 2001-07-28 | 2003-02-06 | 태 선 김 | position coordinate data transmission device using navigation system |
CN100380136C (en) | 2001-08-01 | 2008-04-09 | 罗克马诺尔研究有限公司 | passive moving object detection system and metho using signals transmitted by mobile telephone station |
GB2378335B (en) | 2001-08-03 | 2005-09-28 | Roke Manor Research | Method of determining the position of a target |
AUPR697101A0 (en) | 2001-08-13 | 2001-09-06 | Quiktrak Networks Ltd | Improvements to tracking systems |
US6861982B2 (en) | 2001-08-16 | 2005-03-01 | Itt Manufacturing Enterprises, Inc. | System for determining position of an emitter |
US6873903B2 (en) | 2001-09-07 | 2005-03-29 | R. Michael Baiada | Method and system for tracking and prediction of aircraft trajectories |
US7333887B2 (en) | 2003-08-08 | 2008-02-19 | Baiada R Michael | Method and system for tactical gate management by aviation entities |
FR2829583B1 (en) | 2001-09-07 | 2006-07-21 | Thales Sa | METHOD FOR DETERMINING THE AZIMUT OF A TARGET, BY A RADAR IN PARTICULAR OF THE ASR TYPE |
AU2002326848A1 (en) | 2001-09-10 | 2003-03-24 | Digital Angel Corporation | Container having integral localization and/or sensing device |
US7117121B2 (en) | 2001-09-11 | 2006-10-03 | Zonar Compliance Systems, Llc | System and process to ensure performance of mandated inspections |
US6760387B2 (en) | 2001-09-21 | 2004-07-06 | Time Domain Corp. | Impulse radio receiver and method for finding angular offset of an impulse radio transmitter |
US6681158B2 (en) | 2001-09-21 | 2004-01-20 | Garmin At, Inc. | Uninterruptable ADS-B system for aircraft tracking |
WO2003027934A1 (en) | 2001-09-26 | 2003-04-03 | Hodge Philip T | Method and apparatus for controlling the use of airspace and assessment of use fees and penalties |
JP5019145B2 (en) | 2001-09-28 | 2012-09-05 | 株式会社エクォス・リサーチ | Driver information collection device |
DE10149006A1 (en) | 2001-10-04 | 2003-04-30 | Geiger Automation Gmbh | Collision avoidance system for aircraft, uses GPS data to avoid collision with stationary object |
ITTO20010941A1 (en) | 2001-10-04 | 2003-04-04 | Telecom Italia Lab Spa | ,, PROCEDURE AND SYSTEM FOR THE DETERMINATION OF GEOGRAPHICAL COORDINATES IN MOBILE COMMUNICATION NETWORKS AND RELATED TERMINALS ,, |
US6674398B2 (en) | 2001-10-05 | 2004-01-06 | The Boeing Company | Method and apparatus for providing an integrated communications, navigation and surveillance satellite system |
AU2002367588A1 (en) | 2001-10-10 | 2003-09-29 | Mcloughlin Pacific Corporation | Method and apparatus for tracking aircraft and securing against unauthorized access |
EP1302920B1 (en) | 2001-10-11 | 2004-02-25 | Enterprise S.a.s di C. Carnevali | A system for managing a plurality of vehicles |
FR2831000B1 (en) | 2001-10-17 | 2004-01-02 | Thales Sa | METHOD AND DEVICE FOR TRACKING A TRANSPONDER SIGNAL IN THE PRESENCE OF A PARASITIC FREQUENCY MODULATION OF THE TRANSPOSITION DRIVER |
JP3579685B2 (en) | 2001-10-24 | 2004-10-20 | 独立行政法人電子航法研究所 | Aircraft position display method in display device for air traffic control |
FR2831741B1 (en) | 2001-10-26 | 2003-12-19 | Thales Sa | METHODS AND SYSTEMS FOR RECORDING AND SYNCHRONIZED READING OF DATA FROM A PLURALITY OF TERMINAL EQUIPMENT |
US6549829B1 (en) | 2001-10-31 | 2003-04-15 | The Boeing Company | Skipping filter for inertially augmented landing system |
US6799114B2 (en) | 2001-11-20 | 2004-09-28 | Garmin At, Inc. | Systems and methods for correlation in an air traffic control system of interrogation-based target positional data and GPS-based intruder positional data |
GB2382708B (en) | 2001-11-21 | 2006-03-15 | Roke Manor Research | Detection of foreign objects on surfaces |
US6751545B2 (en) | 2001-12-04 | 2004-06-15 | Smiths Aerospace, Inc. | Aircraft taxi planning system and method |
US6862519B2 (en) | 2001-12-04 | 2005-03-01 | Smiths Aerospace, Inc. | Airport map system with compact feature data storage |
US6828921B2 (en) | 2001-12-05 | 2004-12-07 | The Boeing Company | Data link clearance monitoring and pilot alert sub-system (compass) |
US6617997B2 (en) | 2002-01-03 | 2003-09-09 | Aviation Communication & Surveillance Systems, Llc | Method of determining radio frequency link reliability in an aircraft tracking system |
GB2388264A (en) | 2002-01-10 | 2003-11-05 | Roke Manor Research | GPS based networked time synchronised unit |
ES2240680T3 (en) | 2002-01-29 | 2005-10-16 | Extel S.R.L. | MANAGEMENT SYSTEM OF AN AUTOMATED CAR PARK. |
AU2003211108A1 (en) | 2002-02-14 | 2003-09-04 | Everyday Wireless Llc | Wireless moble vehicle real-time tracking and notification systems and methods related thereto |
DE60325168D1 (en) | 2002-02-19 | 2009-01-22 | Jeppesen Sanderson Inc | FLUGHAFENSROLLWEG NAVIGATION SYSTEM |
US7269096B2 (en) | 2002-02-27 | 2007-09-11 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of National Defense | Identification and location of an object via passive acoustic detection |
US7228207B2 (en) | 2002-02-28 | 2007-06-05 | Sabre Inc. | Methods and systems for routing mobile vehicles |
CA2477553A1 (en) | 2002-03-12 | 2003-09-25 | Menache, Llc | Motion tracking system and method |
DE60301564T2 (en) | 2002-03-13 | 2006-06-14 | Raytheon Canada Ltd | ADAPTIVE SYSTEM AND METHOD FOR RADAR DETECTION |
CA2479282C (en) | 2002-03-14 | 2014-11-04 | Nd A Islandi | A method and system for determining a track record of a moving object |
WO2003081560A1 (en) | 2002-03-21 | 2003-10-02 | United Parcel Service Of America, Inc. | Telematic programming logic control unit and methods of use |
GB2387072B (en) | 2002-03-28 | 2004-09-22 | Motorola Inc | Mobile communication stations, methods and systems |
AU2003269807A1 (en) | 2002-04-01 | 2003-12-31 | Ryan International Corporation | Method and device for protection against runway incursions |
JP3988865B2 (en) | 2002-04-12 | 2007-10-10 | パイオニア株式会社 | GUIDANCE GUIDANCE DEVICE, GUIDANCE GUIDANCE SYSTEM, METHOD THEREOF, PROGRAM THEREOF, AND RECORDING MEDIUM CONTAINING THE PROGRAM |
CN1647570A (en) | 2002-04-19 | 2005-07-27 | 皇家飞利浦电子股份有限公司 | Method and device to identify a periodic light source |
US6912461B2 (en) | 2002-04-23 | 2005-06-28 | Raytheon Company | Multiple approach time domain spacing aid display system and related techniques |
JP3960469B2 (en) | 2002-04-26 | 2007-08-15 | パイオニア株式会社 | Navigation system and navigation device |
WO2003093775A2 (en) | 2002-05-03 | 2003-11-13 | Harman International Industries, Incorporated | Sound detection and localization system |
JP2005527920A (en) | 2002-05-07 | 2005-09-15 | アーゴ−テック・コーポレーション | Tracking system and related methods |
DE10220934B4 (en) | 2002-05-10 | 2005-05-12 | Siemens Ag | System for parking management and / or vehicle registration in the interior and exterior |
WO2003096282A1 (en) | 2002-05-13 | 2003-11-20 | Lyngso Industri A/S | Aviation handling quality measurement |
US7206698B2 (en) | 2002-05-15 | 2007-04-17 | Honeywell International Inc. | Ground operations and imminent landing runway selection |
DE60329385D1 (en) | 2002-05-15 | 2009-11-05 | Honeywell Int Inc | SYSTEM FOR LANDSCAPE SELECTION |
DE10222396A1 (en) | 2002-05-21 | 2003-12-11 | Siemens Ag | Handling system for a vehicle parking facility |
GB0211566D0 (en) | 2002-05-21 | 2002-06-26 | Koninkl Philips Electronics Nv | Method and apparatus for providing travel relating information to a user |
FR2840411B1 (en) | 2002-06-03 | 2004-08-27 | Centre Nat Etd Spatiales | TRAINING ORIENTED ALONG THE ROUTE OF SAR SATELLITES |
US6789016B2 (en) | 2002-06-12 | 2004-09-07 | Bae Systems Information And Electronic Systems Integration Inc. | Integrated airborne transponder and collision avoidance system |
US20040002886A1 (en) | 2002-06-27 | 2004-01-01 | Dickerson William M. | System and method for processing a service order |
ITRM20020371A1 (en) | 2002-07-10 | 2004-01-12 | Maurizio Catello Pennarola | OFF-ROAD AIRCRAFT NAVIGATION MANAGEMENT SYSTEM AND ALARM COMMUNICATIONS. |
US6847587B2 (en) | 2002-08-07 | 2005-01-25 | Frank K. Patterson | System and method for identifying and locating an acoustic event |
US20040044463A1 (en) | 2002-09-04 | 2004-03-04 | Industrial Technology Research Institute | Surface surveillance system for an airport and method |
US6809679B2 (en) | 2002-09-05 | 2004-10-26 | Massachusetts Institute Of Technology | Surveillance system and method for aircraft approach and landing |
WO2004042418A1 (en) | 2002-10-30 | 2004-05-21 | Neale Gerald T | System and method for monitoring position of an airplane from a land base |
US20040086121A1 (en) | 2002-10-31 | 2004-05-06 | Sensis Corporation | Secure automatic dependant surveillance |
US6721652B1 (en) | 2002-11-22 | 2004-04-13 | Electronic Data Systems Corporation (EDS) | Implementing geo-fencing on mobile devices |
FR2848661B1 (en) | 2002-12-13 | 2005-03-04 | Thales Sa | EQUIPMENT ANTICOLLISION TERRAIN ON BOARD AIRCRAFT WITH HELP TO RETURN IN NORMAL FLIGHT |
ITMO20020362A1 (en) | 2002-12-19 | 2004-06-20 | Octo Telematics Srl | COMMUNICATION DEVICE FOR RECEIVING VEHICLES |
KR20050094851A (en) | 2003-01-14 | 2005-09-28 | 마쯔시다덴기산교 가부시키가이샤 | Navigation device and approach information display method |
US6927701B2 (en) | 2003-01-29 | 2005-08-09 | Architecture Technology Corporation | Runway occupancy monitoring and warning |
US7012522B1 (en) | 2003-02-05 | 2006-03-14 | Katherine Le Van | Child monitoring system |
US7248963B2 (en) | 2003-03-25 | 2007-07-24 | Baiada R Michael | Method and system for aircraft flow management |
DE60321538D1 (en) | 2003-04-03 | 2008-07-24 | Mitsubishi Electric Corp | Runtime difference determination in distributed sensor networks |
SE0301097L (en) | 2003-04-11 | 2004-10-12 | Generic Ab | Location system |
US6801152B1 (en) | 2003-04-21 | 2004-10-05 | Northrop Grumman Corporation | Method for determining the optimum observer heading change in bearings-only passive emitter tracking |
US6950037B1 (en) | 2003-05-06 | 2005-09-27 | Sensis Corporation | Smart airport automation system |
US6873269B2 (en) | 2003-05-27 | 2005-03-29 | Honeywell International Inc. | Embedded free flight obstacle avoidance system |
US7948404B2 (en) | 2003-05-27 | 2011-05-24 | Honeywell International Inc. | Obstacle avoidance situation display generator |
JP2004361186A (en) | 2003-06-03 | 2004-12-24 | Sony Corp | Positional information positioning device |
US7102510B2 (en) | 2003-06-03 | 2006-09-05 | Procon, Inc. | Asset location tracking system |
US7382286B2 (en) | 2003-06-09 | 2008-06-03 | Megadata Corp. | System and method for the correlation of multiple data feeds |
KR100520157B1 (en) | 2003-06-18 | 2005-10-10 | 삼성전자주식회사 | A System and Method For Providing Traffic Information based on Ad Hoc Network |
JP2005031068A (en) | 2003-06-20 | 2005-02-03 | Matsushita Electric Ind Co Ltd | Location guide device |
GB0314422D0 (en) | 2003-06-20 | 2003-07-23 | Qinetiq Ltd | Image processing system |
AU2003242290A1 (en) | 2003-06-23 | 2005-01-04 | Roberto Gentile | Airfield vehicle monitoring system and respective vehicle |
GB0315349D0 (en) | 2003-07-01 | 2003-08-06 | Qinetiq Ltd | Signal processing with reduced combinatorial complexity |
US7286624B2 (en) | 2003-07-03 | 2007-10-23 | Navcom Technology Inc. | Two-way RF ranging system and method for local positioning |
US7250901B2 (en) | 2003-07-03 | 2007-07-31 | Navcom Technology Inc. | Synthetic aperture radar system and method for local positioning |
FR2858061B1 (en) | 2003-07-25 | 2005-10-07 | Thales Sa | METHOD FOR DETECTION AND MULTI STATIC LOCATION OF MOBILE DEVICE USING DIGITAL BROADCAST TRANSMITTERS |
US6985103B2 (en) | 2003-07-29 | 2006-01-10 | Navaero Ab | Passive airborne collision warning device and method |
US7170441B2 (en) | 2003-08-14 | 2007-01-30 | Sensis Corporation | Target localization using TDOA distributed antenna |
DE602004019544D1 (en) | 2003-08-24 | 2009-04-02 | Aron Matalon | DEVICE AND METHOD FOR CONTROLLING MOVING VEHICLES |
JP4113080B2 (en) | 2003-09-05 | 2008-07-02 | 株式会社東芝 | Secondary monitoring radar system |
EP1517281B1 (en) | 2003-09-16 | 2007-10-31 | COMSOFT GmbH | Safety nets for alerting of hazardous situations in air traffic |
US20060058954A1 (en) | 2003-10-08 | 2006-03-16 | Haney Philip J | Constrained tracking of ground objects using regional measurements |
FR2860883B1 (en) | 2003-10-10 | 2005-12-23 | Thales Sa | METHOD AND DEVICE FOR FILTERING ANSWERS IN A SECONDARY RADAR EXTRACTOR. |
FR2861051B1 (en) | 2003-10-17 | 2006-03-03 | Thales Sa | METHOD FOR GUIDING APPROACH PHASE AIRCRAFT AND CORRESPONDING FLAT BEACON |
US7308343B1 (en) | 2003-10-21 | 2007-12-11 | Garmin At, Inc. | Navigational instrument, method and computer program product for displaying ground traffic information |
FR2861467B1 (en) | 2003-10-24 | 2005-12-30 | Thales Sa | METHOD AND DEVICE FOR DETERMINING A REFERENCE VALUE OF A RESPONSE, IN PARTICULAR A MODE S RESPONSE RECEIVED BY SECONDARY RADAR |
AU2003292538A1 (en) | 2003-11-25 | 2005-06-17 | Thales Atm S.P.A. | Onboard device on a vehicle for traffic surveillance systems in an airport area |
US7257469B1 (en) | 2003-11-25 | 2007-08-14 | Garmin International, Inc. | Delivering data updates to an avionics device |
US7006032B2 (en) | 2004-01-15 | 2006-02-28 | Honeywell International, Inc. | Integrated traffic surveillance apparatus |
US7460871B2 (en) | 2004-01-16 | 2008-12-02 | Skyguard, Llc | Method and system for tracking mobile telemetry devices |
US7164986B2 (en) | 2004-01-16 | 2007-01-16 | Mci, Llc | Method and system for tracked device location and route adherence via geofencing |
US20050162309A1 (en) | 2004-01-16 | 2005-07-28 | Mci, Inc. | Method and apparatus for data filtering in a tracking system |
US20050159170A1 (en) | 2004-01-16 | 2005-07-21 | Gagan Puranik | Method and system for transmitting assistance location data for fleet and asset management |
US7050909B2 (en) | 2004-01-29 | 2006-05-23 | Northrop Grumman Corporation | Automatic taxi manager |
EP1560186B1 (en) | 2004-01-30 | 2007-10-24 | Nec Corporation | Vehicle information collection system having point issuing device |
FR2866171B1 (en) | 2004-02-06 | 2006-06-30 | Thales Sa | AUTOMATIC METHOD OF TRANSMITTING SURVEILLANCE ALERTS ON THE GROUND |
US7026987B2 (en) | 2004-02-10 | 2006-04-11 | Thales Navigation, Inc. | Asynchronous assisted GPS position determination |
CA2554417C (en) | 2004-02-17 | 2010-11-23 | Jadi, Inc. | Ultra wide band navigation system with mobile base stations |
US7577501B2 (en) | 2004-02-26 | 2009-08-18 | The Boeing Company | Methods and systems for automatically tracking information during flight |
US7605756B2 (en) | 2004-03-01 | 2009-10-20 | Ez 2 Cad Ltd | System a method and an apparatus for performing wireless measurements, positioning and surface mapping by means of a portable coordinate system |
US7109889B2 (en) | 2004-03-01 | 2006-09-19 | Honeywell International Inc. | Methods and apparatus for surface movement situation awareness |
FR2868541B1 (en) | 2004-03-30 | 2006-05-26 | Thales Sa | METHOD FOR BROADBAND BLIND LOCATION OF ONE OR MORE TRANSMITTERS FROM A DEFINING BEARER |
US7190303B2 (en) | 2004-03-30 | 2007-03-13 | Aviation Communication & Surveillance Systems, Llc | Systems and methods employing a collision avoidance system to enhance pilot awareness |
US7187327B2 (en) | 2004-04-01 | 2007-03-06 | Itt Manufacturing Enterprises, Inc. | Method and system for determining the position of an object |
US7272495B2 (en) | 2004-04-01 | 2007-09-18 | Itt Manufacturing Enterprises, Inc. | System and method for inverse multilateration |
DE202004007747U1 (en) | 2004-05-06 | 2004-09-23 | Kalinka, Holger | Aircraft monitoring system e.g. for air traffic control of aircraft, has on board computer for data storage and or data processing with measuring module |
US20060023655A1 (en) | 2004-05-17 | 2006-02-02 | Engel Glenn R | System and method for detection of signal tampering |
ITRM20040249A1 (en) | 2004-05-17 | 2004-08-17 | Univ Roma | HIGH PRECISION SURVEILLANCE SYSTEM BY MULTILATERATION OF SSR SIGNALS. |
US7590475B2 (en) | 2004-06-03 | 2009-09-15 | Bae Systems Information And Electronic Systems Integration Inc. | Method and system for providing a covert warning notification of a hazard to an aircraft |
US7383124B1 (en) | 2004-06-09 | 2008-06-03 | Rockwell Collins, Inc. | ADS-B broadcast monitoring system and method |
US7071867B2 (en) | 2004-06-25 | 2006-07-04 | The Boeing Company | Method, apparatus, and computer program product for radar detection of moving target |
US6977612B1 (en) | 2004-06-29 | 2005-12-20 | Electronic Data Systems Corporation | System and method for wireless asset tracking |
US7515715B2 (en) | 2004-07-08 | 2009-04-07 | Honeywell International Inc. | Information security for aeronautical surveillance systems |
JP4491586B2 (en) | 2004-08-06 | 2010-06-30 | 独立行政法人 宇宙航空研究開発機構 | Low noise flight support system |
US7148816B1 (en) | 2004-08-30 | 2006-12-12 | Rockwell Collins, Inc. | Aircraft traffic source selection and display system and method |
CA2518005A1 (en) | 2004-09-02 | 2006-03-02 | International Microtech Corporation | Virtual fence |
JP4039410B2 (en) | 2004-09-02 | 2008-01-30 | セイコーエプソン株式会社 | Terminal device and program |
US20080062011A1 (en) | 2004-09-07 | 2008-03-13 | Butler William M | Collision Avoidance Warning And Taxi Guidance Device |
GB2418267A (en) | 2004-09-08 | 2006-03-22 | Qinetiq Ltd | Shared resource management |
US7233545B2 (en) | 2004-09-08 | 2007-06-19 | Mcginn-Harvey Holdings, Llc | System and method for determining the location of an acoustic event |
EP1635189B1 (en) | 2004-09-14 | 2015-03-04 | Kabushiki Kaisha Toshiba | Secondary surveillance radar and its interrogation transmission method |
JP4253291B2 (en) | 2004-09-15 | 2009-04-08 | 株式会社東芝 | Secondary monitoring radar system and its ground equipment |
US7379165B2 (en) | 2004-09-30 | 2008-05-27 | The Boeing Company | Ground vehicle collision prevention systems and methods |
US7761196B2 (en) | 2004-10-01 | 2010-07-20 | Honeywell International Inc. | Methods and systems of determining bearing when ADS-B data is unavailable |
ITRM20040503A1 (en) | 2004-10-14 | 2005-01-14 | Uni Degli Studi Di Roma Tor Vergata | TRANSPONDER OF SECONDARY SURVEILLANCE RADAR (SSR) FREQUENCY AGILE. |
GB0423793D0 (en) | 2004-10-27 | 2004-12-01 | Ibm | A method and system for gathering and processing data for road use charging |
GB0424491D0 (en) | 2004-11-05 | 2004-12-08 | Qinetiq Ltd | Airspace separation control and collision avoidance |
US7123169B2 (en) | 2004-11-16 | 2006-10-17 | Northrop Grumman Corporation | Method and apparatus for collaborative aggregate situation awareness |
GB0426815D0 (en) | 2004-12-03 | 2005-08-10 | Bae Systems Plc | Emitter geolocation |
JP4331094B2 (en) | 2004-12-03 | 2009-09-16 | 株式会社東芝 | Mode S transponder transmission signal decoding apparatus and mode S transponder transmission signal decoding method |
US7724178B2 (en) | 2004-12-17 | 2010-05-25 | Honeywell International Inc. | Traffic alert collision avoidance system (TCAS) devices and methods |
US7804981B2 (en) | 2005-01-13 | 2010-09-28 | Sensis Corporation | Method and system for tracking position of an object using imaging and non-imaging surveillance devices |
EP1681657A1 (en) | 2005-01-14 | 2006-07-19 | HighGain Antenna Co., Ltd. | Multifunctional On-board-equipment (OBE) for intelligent transport systems (ITS) |
FR2881008B1 (en) | 2005-01-20 | 2007-04-20 | Thales Sa | SATELLITE POSITIONING RECEIVER WITH IMPROVED INTEGRITY AND CONTINUITY |
WO2006079165A1 (en) | 2005-01-25 | 2006-08-03 | Alert Systems Pty Ltd | Proximity warning system |
US7479925B2 (en) | 2005-03-23 | 2009-01-20 | Honeywell International Inc. | Airport runway collision avoidance system and method |
WO2007086899A2 (en) | 2005-03-29 | 2007-08-02 | Advanced Navigation And Positioning Corporation | Transponder landing system augmentation of the global positioning system |
US7307578B2 (en) | 2005-03-31 | 2007-12-11 | Honeywell International Inc. | Declutter of graphical TCAS targets to improve situational awareness |
US7479922B2 (en) | 2005-03-31 | 2009-01-20 | Deere & Company | Method and system for determining the location of a vehicle |
US7567203B2 (en) | 2005-04-11 | 2009-07-28 | Raytheon Canada Limited | Classification system for radar and sonar applications |
US7221308B2 (en) | 2005-04-19 | 2007-05-22 | Northrop Grumman Corporation | Joint stars embedded data link |
WO2006110973A1 (en) | 2005-04-20 | 2006-10-26 | Sicom Systems, Ltd. | Low-cost, high-performance radar networks |
US20060262014A1 (en) | 2005-05-17 | 2006-11-23 | Yaron Shemesh | Radio beacon, mobile station, processor, system and method for determining location |
US20060265664A1 (en) | 2005-05-17 | 2006-11-23 | Hitachi, Ltd. | System, method and computer program product for user interface operations for ad-hoc sensor node tracking |
EP1897080A2 (en) | 2005-06-10 | 2008-03-12 | Aviation Communication & Surveillance Systems, LLC | Systems and methods for enhancing situational awareness of an aircraft on the ground |
EP1897079A1 (en) | 2005-06-13 | 2008-03-12 | Aviation Communication & Surveillance Systems, LLC | Spacing control system and method for aircraft |
CZ2005408A3 (en) | 2005-06-23 | 2007-01-24 | TELEMATIX SERVICES, a.s. | Detection method of moving objects, particularly for carrying out traffic and marketing investigations, payment supervisions, statistics and the like |
US7738884B2 (en) | 2005-06-28 | 2010-06-15 | Microsoft Corporation | Positioning service utilizing existing radio base stations |
GB2427973B (en) | 2005-07-01 | 2008-11-12 | Roke Manor Research | Apparatus and method for determining receiver performance in a multilateration system |
FR2888643B1 (en) | 2005-07-18 | 2009-09-25 | Airbus France Sas | METHOD AND DEVICE FOR DETERMINING THE GROUND POSITION OF A MOBILE, PARTICULARLY FROM AN AIRCRAFT ON AN AIRPORT |
IL169854A (en) | 2005-07-25 | 2013-11-28 | Elta Systems Ltd | System and method for positiong a transponder |
EP1910900B1 (en) | 2005-07-27 | 2016-08-31 | Selex Es Ltd | System and method for determining the time difference between two platforms |
US7437225B1 (en) | 2005-07-29 | 2008-10-14 | Rockwell Collins, Inc. | Flight management system |
US7460866B2 (en) | 2005-08-18 | 2008-12-02 | Tecore, Inc. | Position location for airborne networks |
US7062381B1 (en) | 2005-08-30 | 2006-06-13 | Deere & Company | Method and system for determining relative position of mobile vehicles |
JP4829571B2 (en) | 2005-09-09 | 2011-12-07 | 株式会社日立製作所 | Receiver and positioning distance measuring system |
US7616149B2 (en) | 2005-09-28 | 2009-11-10 | Raytheon Company | Methods and apparatus for radar time sensor |
WO2007048237A1 (en) | 2005-10-27 | 2007-05-03 | Marcia Consulting Ltd. | System and method for use in air traffic management |
US7352318B2 (en) | 2005-10-31 | 2008-04-01 | Honeywell International Inc. | Method and system for real time pulse processing in ATCRBS/Mode-S transponders |
US7822415B2 (en) | 2005-11-02 | 2010-10-26 | Comtech Mobile Datacom Corporation | In-flight transceiver and locator system |
DE602005014995D1 (en) | 2005-11-07 | 2009-07-30 | Saab Ab | Error detection in an air traffic management system |
US7701388B2 (en) | 2005-11-15 | 2010-04-20 | O2Micro International Ltd. | Novas hybrid positioning technology using terrestrial digital broadcasting signal (DBS) and global positioning system (GPS) satellite signal |
FR2894365B1 (en) | 2005-12-02 | 2008-01-11 | Thales Sa | DEVICE AND METHOD FOR CHANGING AREAS PROHIBITED TO AN AIRCRAFT |
FR2894347B1 (en) | 2005-12-02 | 2008-02-01 | Thales Sa | AUTONOMOUS AND AUTOMATIC LANDING SYSTEM FOR DRONES. |
US7761232B2 (en) | 2005-12-06 | 2010-07-20 | Cypress Semiconductor Corporation | Wireless locating and monitoring system |
US7457690B2 (en) | 2005-12-14 | 2008-11-25 | Boeing Co | Systems and methods for representation of a flight vehicle in a controlled environment |
GB2433796A (en) | 2005-12-23 | 2007-07-04 | Nats Plc | Air traffic control system |
GB2433795A (en) | 2005-12-23 | 2007-07-04 | Nats | Air traffic control system |
US7477145B2 (en) | 2006-01-04 | 2009-01-13 | John Bean Technologies Corporation | Airport operations monitoring system |
JP5517393B2 (en) | 2006-01-05 | 2014-06-11 | 三菱重工業株式会社 | Mobile charging system and mobile charging method using mobile charging system |
DE102006009121B4 (en) | 2006-02-24 | 2012-05-31 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Process for processing and displaying ground images obtained by synthetic aperture radar (SAR) systems |
WO2008045134A2 (en) | 2006-03-07 | 2008-04-17 | Dimensional Research, Inc. | Airborne situational awareness system |
WO2007143238A2 (en) | 2006-03-24 | 2007-12-13 | Sensis Corporation | Method and system for correlating radar position data with target identification data, and determining target position using round trip delay data |
DE202006005089U1 (en) | 2006-03-28 | 2006-06-29 | Moving Terrain Air Navigation Systems Ag | Generation and checking of flight path data in order to obtain approval uses electronic generation of flight path data |
GB0606489D0 (en) | 2006-03-31 | 2006-05-10 | Qinetiq Ltd | System and method for processing imagery from synthetic aperture systems |
WO2007115246A1 (en) | 2006-04-04 | 2007-10-11 | Sensis Corporation | Secure ads-b authentication system and method |
US8768540B2 (en) | 2006-04-10 | 2014-07-01 | L-3 Communications Corporation | Integrated avionics system |
WO2008051292A2 (en) | 2006-04-10 | 2008-05-02 | Aviation Communication & Surveillance Systems Llc | Systems and methods of providing whisper shout surveillance with a tcas |
US20100253565A1 (en) | 2006-04-10 | 2010-10-07 | Piesinger Gregory H | Method and apparatus to increase ADS-B squitter reception sensitivity |
US8164485B2 (en) | 2006-04-13 | 2012-04-24 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | System and method for aiding pilot preview, rehearsal, review, and real-time visual acquisition of flight mission progress |
WO2007124300A2 (en) | 2006-04-21 | 2007-11-01 | Sensis Corporation | A system and method for multilaterating a position of a target using mobile remote receiving units |
US8160758B2 (en) | 2006-05-22 | 2012-04-17 | Honeywell International Inc. | Methods and systems for radar aided aircraft positioning for approaches and landings |
JP5214168B2 (en) | 2006-06-23 | 2013-06-19 | 株式会社東芝 | Mode S secondary monitoring radar |
GB0613055D0 (en) | 2006-06-30 | 2006-08-09 | Nats En Route Plc | Air traffic control |
WO2008005012A1 (en) | 2006-07-03 | 2008-01-10 | Axonn Llc | Asset management device and method using simplex satellite transmitter augmented with local area transceiver |
GB2443242A (en) | 2006-07-03 | 2008-04-30 | Roke Manor Research | Means for alleviating a discontinuity in the coverage between adjacently located multilateration systems |
US9037321B2 (en) | 2006-07-25 | 2015-05-19 | Honeywell International Inc. | Airborne advisory for inadvertent approach to taxiway |
WO2008012377A1 (en) | 2006-07-28 | 2008-01-31 | Indra Sistemas, S.A | Locating system that uses personal radiobeacons |
US7626513B2 (en) | 2006-08-02 | 2009-12-01 | The Boeing Company | Communication of landing conditions |
WO2008018088A1 (en) | 2006-08-08 | 2008-02-14 | Shailendra Bansal | A device for automatic vehicle location in real time and improved security and a method thereof |
US7567187B2 (en) | 2006-08-11 | 2009-07-28 | Honeywell International Inc. | Taxiway awareness and advisory system |
EP1901085B1 (en) | 2006-09-12 | 2014-05-28 | u-blox AG | GNSS Receiver IC package |
JP4498332B2 (en) | 2006-09-14 | 2010-07-07 | 株式会社東芝 | Mode S secondary monitoring radar device |
US7583223B2 (en) | 2006-09-18 | 2009-09-01 | Honeywell International Inc. | Distributed and Cable reduced TCAS |
WO2008035981A2 (en) | 2006-09-19 | 2008-03-27 | Unified Messaging Systems As | Method and system for preventing accidents |
GB2442777A (en) | 2006-10-12 | 2008-04-16 | Qinetiq Ltd | Method for monitoring the operation of a DME beacon |
GB2443226B (en) | 2006-10-28 | 2011-08-17 | Qinetiq Ltd | Method and apparatus for locating the source of an unknown signal |
US7796055B2 (en) | 2006-11-02 | 2010-09-14 | The Boeing Company | Runway status indication and traffic information display and filtering |
US7876259B2 (en) | 2006-11-06 | 2011-01-25 | Leonard Schuchman | Automatic dependent surveillance system secure ADS-S |
US7786922B2 (en) | 2006-11-27 | 2010-08-31 | Aviation Communication & Surveillance Systems Llc | Systems and methods employing active TCAS to enhance situational awareness |
IL179678A0 (en) | 2006-11-28 | 2008-01-20 | Israel Aerospace Ind Ltd | Airport anti-collision system and method |
US8880133B2 (en) | 2006-12-01 | 2014-11-04 | Intelligent Mechatronic Systems Inc. | Vehicle communication device |
GB2444300B (en) | 2006-12-01 | 2008-12-24 | Roke Manor Research | Method for use in a multilateration system and a multilateration system |
US7844280B2 (en) | 2006-12-12 | 2010-11-30 | Trueposition, Inc. | Location of wideband OFDM transmitters with limited receiver bandwidth |
GB0624191D0 (en) | 2006-12-04 | 2007-01-10 | Nxp Bv | Road toll system |
US7414567B2 (en) | 2006-12-22 | 2008-08-19 | Intelligent Automation, Inc. | ADS-B radar system |
US7616155B2 (en) | 2006-12-27 | 2009-11-10 | Bull Jeffrey F | Portable, iterative geolocation of RF emitters |
DE602007013684D1 (en) | 2007-01-24 | 2011-05-19 | Toshiba Kk | Secondary surveillance radar and method for analysis of secondary surveillance radar responses |
US20080183344A1 (en) | 2007-01-30 | 2008-07-31 | Arinc Inc. | Systems and methods for communicating restricted area alerts |
GB0701869D0 (en) | 2007-01-31 | 2007-03-14 | Cambridge Consultants | Adaptive radar |
JP2008190964A (en) | 2007-02-02 | 2008-08-21 | Omron Corp | Measuring device and method |
US8208939B2 (en) | 2007-02-05 | 2012-06-26 | Aeroscout Ltd. | Dual bandwidth time difference of arrival (TDOA) system |
US7479919B2 (en) | 2007-02-07 | 2009-01-20 | Honeywell International Inc. | Surface vehicle transponder |
EP1965219A1 (en) | 2007-03-01 | 2008-09-03 | Selex Communications S.P.A. | Method and system for predicting the performance of satellite navigation systems |
GB2450075A (en) | 2007-03-08 | 2008-12-17 | Selex Sensors & Airborne Sys | Tracking device for guiding a flight vehicle towards a target |
DE102007014599A1 (en) | 2007-03-23 | 2008-09-25 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Method for monitoring a taxiing management system for airports |
JP5069492B2 (en) | 2007-04-13 | 2012-11-07 | 株式会社エヌ・ティ・ティ・ドコモ | Positioning system, IC chip for positioning, positioning method and positioning program |
ITRM20070214A1 (en) | 2007-04-17 | 2008-10-18 | Biofly S R L | ELECTRONIC EQUIPMENT FOR HIGH-PROTECTION SURVEILLANCE OF AIR TRAFFIC TO INHIBIT THE UNAUTHORIZED USE OF AIRCRAFT |
US7908082B2 (en) | 2007-05-04 | 2011-03-15 | The Boeing Company | Methods and systems for displaying airport moving map information |
FR2916530B1 (en) | 2007-05-23 | 2009-07-10 | Airbus France Sa | METHOD AND DEVICE FOR MONITORING POSITION INDICATION OF AN AIRCRAFT |
US8825365B2 (en) | 2007-05-23 | 2014-09-02 | Honeywell International Inc. | Methods and systems for detecting a potential conflict between aircraft on an airport surface |
GB0710126D0 (en) | 2007-05-26 | 2007-07-04 | Tann Ltd | Global positioning system error correction and global positioning system vehicle tracking |
US7962279B2 (en) | 2007-05-29 | 2011-06-14 | Honeywell International Inc. | Methods and systems for alerting an aircraft crew member of a potential conflict between aircraft on a taxiway |
JP2008298596A (en) | 2007-05-31 | 2008-12-11 | Toshiba Corp | Dme ground apparatus |
EP2162757B1 (en) | 2007-06-01 | 2011-03-30 | Technische Universität Graz | Joint position-pitch estimation of acoustic sources for their tracking and separation |
GB0712376D0 (en) | 2007-06-26 | 2007-08-01 | Nxp Bv | Processing of satellite navigation system signals |
GB0712936D0 (en) | 2007-07-05 | 2007-08-15 | Airbus Uk Ltd | A Method, apparatus or software for determining the location of an acoustic emission emitted in a structure |
JP4906618B2 (en) | 2007-07-13 | 2012-03-28 | 株式会社エヌ・ティ・ティ・ドコモ | Positioning system, IC chip for positioning, positioning method and positioning program |
EP2023155A1 (en) | 2007-07-25 | 2009-02-11 | Aneva S.r.l. | GPS receiver comprising a data link via GPRS and/or UMTS |
US7755516B2 (en) | 2007-08-20 | 2010-07-13 | The Boeing Company | Traffic display system, aircraft including the display system and method of displaying off-scale traffic in the display system |
-
2007
- 2007-03-20 US US11/688,348 patent/US8203486B1/en not_active Expired - Fee Related
-
2008
- 2008-02-08 EP EP08002332A patent/EP1972962A3/en not_active Withdrawn
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EP1972962A3 (en) | 2008-10-22 |
US8203486B1 (en) | 2012-06-19 |
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