In chapter 3 , the statistical properties of raw data of the received electromagnetic waves are analyzed and computed , which show that the real and imaginary parts of sar raw data have zero means , slow changing variance , and asymptotically gaussian distribut 第三章分析和計算了合成孔徑雷達原始數(shù)據(jù)的統(tǒng)計特征。原始數(shù)據(jù)的實部和虛部滿足均值近似為零的漸進高斯分布且相互獨立,數(shù)據(jù)的熵值較高。