Title :
Motion compensation for airborne SAR
Author :
Fuxiang, Cao ; Zheng, Bao ; Jianping, Yuan
Author_Institution :
Lab. for Radar Signal Process., Xidian Univ., Xi´´an, China
Abstract :
To obtain a high resolution image from an airborne synthetic aperture radar (SAR), it is essential that accurate motion compensation be applied to the radar returns to reduce image degradation, caused by spurious motion of antenna phase center (APC), to an acceptable level. This paper describes a new SAR motion compensation system (SARMCS), which includes a airplane MINS (master inertial navigation system) and a GPS receiver located near the mass center of the aircraft, a slaved low cost strapdown IMU (inertial measurement unit) mounted on the antenna structure. The performance requirements of the SARMC are described, the configuration of SARMCS itself is outlined, and finally simulation results are given
Keywords :
Doppler radar; Global Positioning System; Kalman filters; airborne radar; aircraft antennas; filtering theory; image resolution; inertial navigation; motion compensation; radar antennas; radar imaging; radar resolution; radio receivers; synthetic aperture radar; tracking filters; Doppler radar; GPS receiver; Kalman filter; SAR motion compensation system; airborne SAR; airborne synthetic aperture radar; airplane MINS; antenna phase center; antenna structure; high resolution image; image degradation reduction; inertial measurement unit; master inertial navigation system; performance requirements; radar returns; simulation results; strapdown IMU; Airborne radar; Airplanes; Aperture antennas; Degradation; Image resolution; Master-slave; Motion compensation; Radar antennas; Radar imaging; Synthetic aperture radar;
Conference_Titel :
Signal Processing Proceedings, 2000. WCCC-ICSP 2000. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-5747-7
DOI :
10.1109/ICOSP.2000.893466
