摘要
分布式卫星SAR系统是近几年提出的一种新的SAR系统,干涉SAR(INSAR)成像是该系统的主要工作模式。本文主要研究该系统中地球自转、分布式卫星系统环绕对INSAR测高精度影响,分析和推导了修正的成像公式及误差曲线。详细分析了不同纬度及不同环绕角时的测高误差变化。仿真结果表明:纬度越低、环绕角越大时,测高误差越大。赤道附近的测高误差最大。
The Cluster Micro-Satellite Synthetic Aperture Radar (SAR) System is an innovative SAR system brought forward recently. The interferometric SAR (INSAR) imaging is one of the principal working patterns of the system. This paper research mainly the influence of the Earth rotation and the Cluster-Satellite rotation to the INSAR imaging precision in the system, analyze and derive the correcting formula and the deviation curvature, and analyze the height-deviation shift in the variant latitudes and in the variant rotating size. By computer simulation, the analysis results verify that when the latitude is lower and the rotating angle is larger, the height-error is higher. And the height-error is the highest near the equator.
出处
《信号处理》
CSCD
2003年第1期36-39,共4页
Journal of Signal Processing
关键词
分布式卫星合成孔径雷达
分布式卫星系统
SAR
测高精度分析
cluster micro-satellite system
synthetic aperture radar (SAR)
earth-rotation
cluster satellites rotation
height correction
error analysis
