A Compensation Method for Airborne SAR with Varying Accelerated Motion Error

作者：Yi, Tianzhu; He, Zhihua^*; He, Feng; Dong, Zhen; Wu, Manqing; Song, Yongping

来源：Remote Sensing, 2018, 10(7): 1124.

DOI：10.3390/rs10071124

• airborne synthetic aperture radar (SAR)
• global position system (GPS)
• inertial navigation system (INS)
• best linear unbiased estimation (BLUE)

Motion error is one of the most serious problems in airborne synthetic aperture radar (SAR) data processing. For a smoothly distributing backscatter scene or a seriously speed-varying velocity platform, the autofocusing performances of conventional algorithms, e.g., map-drift (MD) or phase gradient autofocus (PGA) are limited by their estimators. In this paper, combining the trajectories measured by global position system (GPS) and inertial navigation system (INS), we propose a novel error compensation method for varying accelerated airborne SAR based on the best linear unbiased estimation (BLUE). The proposed compensating method is particularly intended for varying acceleration SAR or homogeneous backscatter scenes, the processing procedures and computational cost of which are much simpler and lower than those of MD and PGA algorithms.

• 出版日期2018-7
• 单位中国人民解放军国防科学技术大学