基线特征对天基双天线InSAR性能的影响分析

基线特征对天基双天线InSAR性能的影响分析

内容简介：天基双天线InSAR以空间站等为平台，其基线特征对系统干涉测高性能有重要影响。针对姿态变化、振动和基线测量误差三个影响干涉测高性能的主要因素开展分析，可以得出姿态变化和天线杆振动引起的基线变化会造成干涉相干性的变化、图像相位变化等，进而影响干涉测高，图像相位变化引起的干涉相位变化是其中主要影响因素，为了对其进行补偿，需要高精度的基线测量。仿真结果验证了理论上的分析。

Abstract：The platform of space bi-antenna InSAR includes space station, space shuttle, etc. The baseline characteristics of the space bi-antenna InSAR can seriously influence the interferometric performance. Three main factors which can influence the interferometric baseline are analyzed, namely, attitude variety, oscillation and measurement error. Analysis shows that the baseline variety caused by attitude variety and mast oscillation may result in coherence variety and image phase variety, which will consequently affect the interferometric performance. Interferometric phase variety caused by image phase variety is the main factor, and precise baseline measurement is needed for compensation. Theoretic analysis is verified through simulation.

作者：孙造宇, 董臻,

关键词：基线, 姿态, 振动, 测量, InSAR, 影响分析,