MOTION COMPENSATION OF L-BAND SAR USING GNSS-INS

An experiment using the Vector Network Analyzer, modified from LiSALAB Ground-Based Synthetic Aperture Radar (GBSAR) system has been performed to evaluate the feasibility of constructing a mobile SAR system operating at L-band. Data was collected in a parking lot in Purdue University, West Lafayette. The system utilizes a GNSS-INS unit to acquire position information for assisting azimuth signal compression, and the acquired data was azimuth compressed with Range-Doppler Algorithm (RDA) [1]. We have demonstrated the feasibility of using a GNSS-INS system to correct the irregular motion of the Radar platform to improve accuracy in signal compression, resultant image with and without position correction has been shown as a comparison.