Spaceborne SAR imaging by exact compensation of the attitude errors

Zhiyong Zhang; Zhiguo Cao; Tianxu Zhang

doi:10.1117/12.357632

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13 August 1999 Spaceborne SAR imaging by exact compensation of the attitude errors

Zhiyong Zhang, Zhiguo Cao, Tianxu Zhang

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Proceedings Volume 3721, Algorithms for Synthetic Aperture Radar Imagery VI; (1999) https://doi.org/10.1117/12.357632
Event: AeroSense '99, 1999, Orlando, FL, United States

Abstract

When the space-borne SAR works on the low-stability platform, the Doppler parameters (Doppler centroid and Doppler frequency rate) show variations during the azimuth illumination time, except that the variation of the Doppler parameters as a function of the range distance. That is to say, the azimuth reference function is two-dimensional variant (in range distance and azimuth), the conventional clutter lock and auto- focus for estimation of Doppler parameters are not sufficient for imaging. A model-based algorithm is proposed to exactly compensate the error introduced by the platform attitude instability, the efficiency of the algorithm is tested with computer simulation.

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Zhiyong Zhang, Zhiguo Cao, and Tianxu Zhang "Spaceborne SAR imaging by exact compensation of the attitude errors", Proc. SPIE 3721, Algorithms for Synthetic Aperture Radar Imagery VI, (13 August 1999); https://doi.org/10.1117/12.357632

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