Patent ID: 7528762
Filing Date: 2009-05-05
Classification: G01S,G01V

Abstract:
1. A method of improving the data from ground penetrating radar (GPR) signals transmitted from an airborne platform into the ground and reflected from an object or feature in the ground, comprising: selecting a frequency for the signal, based on characteristics of the ground and a desired depth of penetration of the signal into the ground; wherein the frequency is in the range of 1 MHz to 1 GHz; selecting a wave angle for the signal that minimizes the reflection coefficient for the signal at the interface between air and the ground; at the selected frequency and selected wave angle: acquiring a first set of signal return data from a vertically polarized GPR signal, and simultaneously or nearly simultaneously acquiring a second set of signal return data from a horizontally polarized GPR signal; differencing the first set of signal return data and the second set of signal return data, such that data resulting from surface reflections are cancelled from the differenced data; and analyzing the non-cancelled data to determine data representing subsurface reflections of the vertically polarized GPR signal and the horizontally polarized GPR signal, thereby obtaining data representing subsurface features.