The invention comprises a method for processing crosswell seismic data from a region of the earth's subsurface generated by transmitting a seismic signal from a plurality of source positions within at least one borehole within said region and detecting said seismic signal at a plurality of receiver positions...http://www.google.es/patents/US6269310?utm_source=gb-gplus-sharePatente US6269310 - System for eliminating headwaves in a tomographic process
System for eliminating headwaves in a tomographic process
