Analysis and on-orbit verification of aiming accuracy for spaceborne SAR

Xin Guo; Xiaofei Xi; Lei Yu; Wei Zhang; Sihan Shi

doi:10.1117/12.3032190

3 June 2024 Analysis and on-orbit verification of aiming accuracy for spaceborne SAR

Xin Guo, Xiaofei Xi, Lei Yu, Wei Zhang, Sihan Shi

Proceedings Volume 13170, International Conference on Remote Sensing, Surveying, and Mapping (RSSM 2024); 1317006 (2024) https://doi.org/10.1117/12.3032190
Event: Third International Conference on Remote Sensing, Surveying, and Mapping (RSSM 2024), 2024, Wuhan, China

Abstract

With the resolution of spaceborne synthetic aperture radar reaching sub meter level, the mapping bandwidth is only 3km to 5 km. This reduces the effectiveness of aiming and capturing the observed target. Therefore, it is necessary to analyze the influencing factors for aiming accuracy of spaceborne SAR. This article conducts analysis from the aspects of ground telemetry/track and command system, ground operation control system, satellite platform and payload. An error model based on the influencing factors of entire satellite-ground link and on-orbit testing method suitable for any scenario are proposed. The results of theoretical prediction and real test show that 120m orbit height prediction error, 90m target elevation error, 5m slant measurement error, 0.03° satellite attitude pointing error and 0.01° systematic beam pointing error of SAR antenna will bring about 400m aiming accuracy.

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

Citation Download Citation

Xin Guo, Xiaofei Xi, Lei Yu, Wei Zhang, and Sihan Shi "Analysis and on-orbit verification of aiming accuracy for spaceborne SAR", Proc. SPIE 13170, International Conference on Remote Sensing, Surveying, and Mapping (RSSM 2024), 1317006 (3 June 2024); https://doi.org/10.1117/12.3032190

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