Imaging algorithm for high resolution spaceborne spotlight/sliding spotlight SAR

Tianshun Xiang; Hongxing Dang; Yang Gao; Juanjuan Yang; Suli Lei; Ruohan Hou

doi:10.1117/12.3050034

11 December 2024 Imaging algorithm for high resolution spaceborne spotlight/sliding spotlight SAR

Tianshun Xiang, Hongxing Dang, Yang Gao, Juanjuan Yang, Suli Lei, Ruohan Hou

Proceedings Volume 13441, International Conference on Cloud Computing and Communication Engineering (CCCE 2024); 1344108 (2024) https://doi.org/10.1117/12.3050034
Event: International Conference on Cloud Computing and Communication Engineering (CCCE 2024), 2024, Nanjing, China

Abstract

For high resolution spaceborne spotlight/sliding spotlight SAR, it is essential to consider the error of the range equation and signal azimuth spectrum aliasing, both of which are caused by the long illuminate time. In order to address these issues, we present an imaging algorithm for high resolution spaceborne spotlight/sliding spotlight SAR. Firstly, it utilizes "curve orbit compensation" to compensate for range space variation error prior to RCMC, thereby avoiding defocusing issues resulting from the error of the range equation. Secondly, through the use of the "extended TSA", variations in Doppler center frequency and Doppler frequency rate with instantaneous range frequency are employed for azimuth pre-processing, effectively overcoming problems associated with azimuth spectrum aliasing. Simulation results for point targets demonstrate the effectiveness of the proposed algorithm.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Tianshun Xiang, Hongxing Dang, Yang Gao, Juanjuan Yang, Suli Lei, and Ruohan Hou "Imaging algorithm for high resolution spaceborne spotlight/sliding spotlight SAR", Proc. SPIE 13441, International Conference on Cloud Computing and Communication Engineering (CCCE 2024), 1344108 (11 December 2024); https://doi.org/10.1117/12.3050034

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