机载重航过UWB InSAR干涉图生成

Interferogram Generation Based on Real Airborne UWB SAR Images

机载重航过超宽带(Ultra Wide Band,UWB)干涉合成孔径雷达(SAR Interferometry,InSAR)技术是一个新课题,有许多问题需要研究。分析了UWB InSAR与一般窄带InSAR相比的优势和特点,总结了UWB InSAR实现技术的难点。结合处理2幅UWB SAR图像获取干涉相位图的过程,着重阐述了粗配准精度条件下干涉相位图的估计。通过理论预测和分析实际情况检验了所得干涉相位条纹的合理性。

Airborne repeat-pass ultra-wideband synthetic aperture radar interferemetry （UWB InSAR） is a new technique for topographic height retrieval and there are many questions to be discussed. In this paper we first analyze the advantages and characteristic in UWB InSAR comparing with general narrow-band InSAR and conclude the difficulties in UWB InSAR realization. Afterward, we demonstrate the processing procedures of interferogram generation from two real UWB SAR images. In that content, an improved estimating interferegram algorithms as the coregistration error reaches one pixel are proposed. Finally, the rationality of the interferemetric phase fringes generated from those two real UWB SAR images was proofed with theoretic and practical terms.