Patent ID: 11940580
Assignee: TRUSTEES OF BOSTON UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. A method for determining a subsurface feature, comprising:
transmitting a surface penetrating radar (SPR) signal at a ground surface;
receiving a response signal that includes elastic waves of a lower frequency acoustic source that interact with the SPR signal;
rapidly processing the response signal including the SPR signal modified by the interaction with the elastic waves; and
determining a physical characteristic of the subsurface feature from the response signal, wherein the elastic wave includes an induced low frequency continuous elastic wave propagating away from a focus region measured using the SPR signal so that at various phases of a low frequency modulation, pulsed waves are sent into the ground surface and back-scattered signals are received and used to create a time sequence of images formed by the SPR signal.