The research of the forward-looking ground penetrating radar SAI

Based on the fact that the forward looking ground penetrating radar (FLGPR) wave propagates through two layers of air and ground, a new off-ground down-looking ground penetrating radar (DLGPR) synthetic aperture imaging (SAI) method is introduced basing on the Snell theorem. Then based on the oblique illumination of the FLGPR, the phase amendment method of the antenna viewing angle is introduced. Finally, based on the offset between the receiving antenna and the transmitting antenna, the phase correction method of the bistatic FLGPR is introduced. Correct the phase by correcting the velocity model. The treatment comparisons of the measurement data show the proposed method is effective.