Effects on ThreeDimensional Geosynchronous Circul

Authors: Leilei Kou Xiaoqing Wang Maosheng Xiang

Publish Date: 2013/07/26

Volume: 42, Issue: 1, Pages: 1-12

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Abstract

Circular SAR imaging on the geosynchronous orbit is an innovative SAR imaging mode which can perform high resolution threedimensional 3D imaging with continuous observations for a large area However for geosynchronous satellites the orbit is severely disturbed by perturbing effects and the orbit error will be an important factor influencing the SAR imaging on the geosynchronous orbit In this paper the effects of the orbit error on performances of 3D geosynchronous circular SAR GEOCSAR imaging are analyzed The error model is firstly made and then the orbit error propagating into the distance from the radar to the target range is derived Furthermore the effects of different components of the range error on the quality of focused SAR signals are deduced based on the 3D GEOCSAR signal model with timedomain correlation algorithm The analyses and simulations will quantify and verify the required accuracies of GEOCSAR orbit estimation for ensuring the 3D imaging quality

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