基于Kalman 滤波的星载双天线InSAR 基线误差估计.pdf

文档介绍：第 39 卷
第 6 期测
绘
学
报 Vol. 39, No. 6
20
10 年 12 月 Acta Geoda etica et Ca rtographica Sinica Dec. , 2010
文章编号: 1001
1595( 2010) 06
0561
05
基于 Kalman 滤波的星载双天线 InSAR 基线误差估计
王晓光1, 2 , 王治强1 , 杨
新1
1. 中国科学院光电研究院, 北京 100190; 2. 中国科学院研究生院, 北京 100049
Baseline Error Estimation of Spa ceborne Dua l
antenna InSAR Based on Ka lma n Filter
WANG Xiaogua ng1, 2 , WANG Z hiqiang1 , YANG Xin1
1. Academy of Optic
electronic s, Chinese Aca demy of Sciences, Beij ing 100190, Chi na; 2. Graduate University, Chinese Aca demy
of Sc iences, Bei jing 100049, China
Abstract : Considering tha t the determina tion precision of interferometric ba seline of spa ceborne dual
a ntenna
InSAR would be reduced due to the effect of mea surement errors and mast oscillations, an onboa rd estimator is
proposed. Ba sed on the ba seline mea surement system prises the optical camera a nd laser range finder,
a Ka lma n filter wa s designed, which got blended with a second
order model of the ma st flexible dynamics. Simula
tions conducted show that the filter could precisely estima te the baseline vector error, which sa tisfies the require
ment of high precision baseline determination.
Key words : SAR; interferometric ba seline; Kalma n filter
摘
要: 针对星载双天线干涉合成孔径雷达( InSAR) 系统中测量误差和天线支撑臂抖动等因素影响基线确定精度问题,
设计星上估计器。基于光学相机和激光测距仪等组成的基线测量系统, 考虑基线抖动, 结合天线支撑臂的模态分析, 构
建完整的状态方程和测量方程, 给出 Kalman 滤波算法。由模拟结果可知, 其基线矢