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The Effect Analysis and Correction of Phase errors by Satellite Attitude Errors using the FSA for the Spotlight SAR Processing  

Shim, Sang-Heun (ADD)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.10, no.2, 2007 , pp. 160-169 More about this Journal
Abstract
In this paper, we have described and simulated the effect analysis and correction of phase errors in the SAR rawdata induced by satellite attitude errors such as drift, jitter. This simulation is based on the FSA(Frequency Scaling Algorithm) for high resolution image formation of the Spotlight SAR. Phase errors produce the degradation of SAR image quality such as loss of resolution, geometric distortion, loss of contrast, spurious targets, and decrease in SNR. To resolve this problem, this paper presents method for correction of phase errors using the PGA(Phase Gradient Algorithm) in connection with the FSA. Several results of the phase errors correction are presented for Spotlight SAR rawdata.
Keywords
Spotlight SAR Processing; Frequency Scaling Algorithm; Satellite Attitude Error; Phase Error; Phase Gradient Algorithm;
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