【摘要】 在考虑斜视和轨道不平行的情况下 ,推导了干涉合成孔径雷达 ( INSAR)信号相关系数的表达式 ,据此说明了各种去相关因素产生的原因和相互关系 ,定量分析了分布式卫星 INSAR系统中多普勒中心去相关、轨道不平行去相关、基线去相关、体散射去相关等去相关因素的作用大小 ;结合分布式卫星 INSAR系统的多基线特点 ,提出了利用多基线数据融合提高信号相关性的有效措施。分析结果表明 ,通过合理设计和有效信号处理 ,分布式卫星 INSAR系统可以获取可靠的干涉测量结果更多还原

【Abstract】 Under the condition of squint mode and crossed orbit, the correlation coefficient expression of interferometric synthetic aperture radar (INSAR) signals is deduced. According to the expression, it explains the sources and interrelation of decorrelation factors. Meanwhile, it quantitatively analyzes the effects of Doppler centroid decorrelation, crossed orbit decorrelation, baseline decorrelation and volume scatter decorrelation on signal correlation. Combined with the property of multi-baseline in INSAR system of the distributed satellites, a method is used to improve signal correlation with multi-baseline data fusion. Analytical results show that the INSAR system of the distributed satellites can acquire reliable interferometric measurement by reasonable design and effective signal processing.更多还原