Quantitative Analysis on the Effect of Fixed Bandwidth Filtering upon the Coherence of InSAR Images
固定带宽滤波对InSAR图像对相关性影响的定量分析

This paper discusses the spectrum function of InSAR baseline decorrelation coefficient, and analyzes the effect of weighting function to InSAR baseline decorrelation coefficient in the procedure of range compression. And the equivalent bandwidth of interferogram spectrum in range direction is defined. Based on the estimated value of the equivalent bandwidth of interferogram spectrum in range direction, the relation between the equivalent bandwidth of interferogram spectrum in range direction and InSAR baseline decorrelation coefficient can be deduced. So the effect of fixed bandwidth filtering upon the coherence of the InSAR images could be quantitatively analyzed. At last of this paper, the experimental results using X-SAR data illustrate the validity of the analysis.