应用科学学报 ›› 2014, Vol. 32 ›› Issue (4): 409-415.doi: 10.3969/j.issn.0255-8297.2014.04.011

• 信号与信息处理 • 上一篇    下一篇

二次多项式星载InSAR 基线优化估计

张过1,2, 郑玉芝1     

  1. 1. 武汉大学测绘遥感信息工程国家重点实验室,武汉430079
    2. 国家测绘地理信息局卫星测绘应用中心,北京101300
  • 收稿日期:2014-03-14 修回日期:2014-04-01 出版日期:2014-07-31 发布日期:2014-04-01
  • 作者简介:张过,教授,博导,研究方向:航天摄影测量、星载SAR\ InSAR 影像处理等,E-mail: guozhang@whu.edu.cn
  • 基金资助:

    科技部支撑项目基金(No.2012BAH28B04);测绘地理信息公益性行业科研专项基金(No.201412007)资助

     

Optimization Estimation for Spaceborne InSAR Baseline Using Quadratic Polynomial

ZHANG Guo1,2, ZHENG Yu-zhi1   

  1. 1. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing,
    Wuhan University, Wuhan 430079, China
    2. Satellite Surveying and Mapping Application Center, National Administration of Surveying,
    Mapping and Geoinformation, Beijing 101300, China
  • Received:2014-03-14 Revised:2014-04-01 Online:2014-07-31 Published:2014-04-01

摘要: 提出了基于二次多项式的星载InSAR 基线优化估计方法. 在干涉相位方程距离向和方位向二阶偏导基础上,分析了基线误差引起的干涉相位误差可利用解缠后的干涉图,采用二次多项式来估计消除基线误差. 利用TerraSAR-X、COSMO-SkyMed、RadarSat-2 及ASAR 等InSAR 卫星带基线误差的干涉数据进行验证,结果表
明所提出的方法可有效消除基线误差引起的相位误差.

关键词: 合成孔径雷达, 基线, 优化, 多项式拟合, 卫星轨道

Abstract:  Baseline is an important parameter in synthetic aperture radar interferometry (InSAR). Tiny errors in length and inclination of the baseline can cause a great error of the interferometric phase, and eventually affect accuracy of the spatial information. This paper proposes a method to optimize estimation of baseline by using quadratic multi-polynomial aimed at unwrapped phase to eliminate the interferometric phase influence caused by the baseline error. TerraSAR-X, COSMO-SkyMed, RadarSat-2 and ASAR images are used to verify effectiveness of the proposed method.

Key words: synthetic aperture radar, baseline, optimization, polynomial fitting, satellite orbit

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