基于轨道外推的分布式卫星InSAR系统基线转换新方法  

A New Baseline Transform Method of Distributed InSAR Based on Orbit Extrapolation

作　　者：郝晓龙[1] 陈力[1] 时信华[1] 

机构地区：[1]北京跟踪与通信技术研究所

出　　处：《飞行器测控学报》2009年第5期71-75,共5页Journal of Spacecraft TT&C Technology

摘　　要：为了满足分布式卫星InSAR系统高精度干涉测高对干涉基线的要求,本文提出了利用轨道外推的基线转换新方法。利用卫星运行速度在雷达1个脉冲重复周期内变化很小这个特点,将测量基线进行插值后,根据雷达复图像配准偏移时间进行外推,得到干涉基线。仿真验证结果表明,利用该方法进行的基线转换,转换精度较高,可以满足分布式卫星InSAR系统干涉测高对干涉基线的要求。This paper proposes a new baseline transform method based on orbit extrapolation to meet the requirements of high accuracy height measurement of distributed interferometric synthetic aperture radar(InSAR) on interferometric baseline.As changes of satellite velocity are very small in a radar pulse repeat time(PRT),measurement baseline is derived from offset time of two complex images after interpolation.Simulation shows that the new baseline transform method has a high accuracy and it meets requirements of height-measurement by InSAR system.

关 键 词：分布式INSAR 轨道外推法 干涉基线 测量基线 

分 类 号：P228[天文地球—大地测量学与测量工程]