分布式卫星的环绕对InSAR测高精度的影响  

The Influence of the Rotating of the Cluster Micro-Satellite on Height Measurement of InSAR

作　　者：张晓玲[1] 曾斌[1] 黄顺吉[1] 

机构地区：[1]电子科技大学电子工程学院,成都610054

出　　处：《电子与信息学报》2004年第1期157-162,共6页Journal of Electronics & Information Technology

摘　　要：分布式卫星SAR系统是最近提出的一种新的SAR系统,该文结合干涉SAR(InSAR)技 术,研究了该系统中InSAR成像所面临的问题,分析和推到了系统环绕引起的干涉相位、基线等参数的变 化,以及对成像高度精度的影响,给出了相应的数学模型及关系曲线。分析结果表明随着环绕角度的增加, 测高误差增大,必须对相位和基线进行合理修正。The cluster micro-satellite Synthetic Aperture Radar(SAR) system is an innovative SAR system brought forward recently. In the cluster micro-satellite system, technology of cross-track intcrferometic SAR, imaging processing is studied. The influence of the rotating of the cluster micro-satellite on the baseline and the interferometric phase is analyzed. The corrected formula of the baseline and the interferometric phase are derived. By computer simulation, the errors between corrected and uucorrccted height measurement are compared. The analysis results verify the correction of the formula and the necessity to correct the baseline and the phase.

关 键 词：分布式卫星系统 INSAR 测高精度 合成孔径雷达 干涉相位 有效基线 成像精度 

分 类 号：TN958[电子电信—信号与信息处理]