A Wide-Beam Motion Compensation Algorithm Based on Frequency Division for Airborne Glacier Penetrating Radar System
Zhao Bo; Liu Xiao-jun; Fang Guang-you
The Institute of Electronics, Chinese Academy of Sciences,
The Key Laboratory of Electromagnetic Radiation and Detection Technology, Beijing 100190, China
Abstract：Motion compensation is essential for wide-beam High Resolution Airborne Glacier Penetrating Radar (HRAGPR). This paper proposes a motion compensation algorithm for wide-beam airborne nadir-looking glacier penetrating radar. Based on frequency division, the wide-beam motion error is transformed to narrow beam error. The algorithm takes blocks along azimuth dimension in frequency and applies angle-variant narrow beam motion compensation in time domain. After that, all blocks are coherently added to compose the compensated data. The algorithm carries out the compensation in time domain, so it is applicable to any motion error form. This paper analyzes the spatial-variant properties of HRAGPR motion error, the principle and processing steps of the algorithm are also presented. Simulation of point target of HRAGPR with low frequency and high frequency motion error validate the effectiveness of the proposed algorithm.
2010, Vol. 32 
