星載sAR輻射定標(biāo)誤差分析及成像處理器增益計算
ANALYSIS OF ERROR IN RADIOMETRIC CALIBRATION FOR SPACEBORNE SAR AND CALCULATION OF IMAGING PROCESSOR GAIN
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摘要: 本文對星載SAR輻射定標(biāo)的各項誤差因素進(jìn)行了分析，提出了計算輻射定標(biāo)誤差的公式，提供了分配星載SAR系統(tǒng)輻射定標(biāo)誤差的工具；對基于CS(Chirp Scaling)算法的成像處理器的增益計算公式進(jìn)行了推導(dǎo)，并通過計算機(jī)仿真得到了驗證；定量地分析了成像處理器增益計算誤差對SAR系統(tǒng)輻射定標(biāo)精度的影響。
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關(guān)鍵詞:
- 星載SAR;輻射定標(biāo);CS算法;成像處理器增益
Abstract: Various factors leading to error in spaceborne SAR radiometric calibration are discussed,and an equation to estimate the radiometric calibration error is proposed．The equation for calculating SAR imaging processor gain based on chirp scaling algorithm is derived,and testified through computer simulation experiments.A quantitative conclusion on the contribution of imaging processor gain to SAR radiometric calibration error is obtained. -
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