J4 ›› 2012, Vol. 39 ›› Issue (4): 87-93.doi: 10.3969/j.issn.1001-2400.2012.04.016

• 研究论文 • 上一篇    下一篇

分布式卫星InSAR目标定位近似闭式解

刘艳阳;李真芳;杨娟娟;保铮   

  1. (西安电子科技大学 雷达信号处理国家重点实验室,陕西 西安  710071)
  • 收稿日期:2011-09-27 出版日期:2012-08-20 发布日期:2012-10-08
  • 通讯作者: 刘艳阳
  • 作者简介:刘艳阳(1987-),男,西安电子科技大学博士研究生,E-mail: yanyangliu0510@163.com.
  • 基金资助:

    国家自然科学基金资助项目(60802074, 41001282,40871205);中央高校基本科研业务费专项资金资助项目(JY10000902011)

Quasi-closed-form solution for distributed satellites  InSAR geolocation

LIU Yanyang;LI Zhenfang;YANG Juanjuan;BAO Zheng   

  1. (National Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an  710071, China)
  • Received:2011-09-27 Online:2012-08-20 Published:2012-10-08
  • Contact: LIU Yanyang

摘要:

研究了利用分布式卫星干涉合成孔径雷达系统(Interferometric Synthetic Aperture Radar,InSAR)生成数字高程模型(Digital Elevation Model, DEM)的三维目标定位方法.相比重复航过InSAR系统,分布式卫星InSAR系统中的副雷达工作于双基模式,其雷达成像几何较为复杂,难以求取分布式卫星InSAR三维目标定位方程的闭式解.针对分布式卫星InSAR目标定位问题,提出一种联合主图像成像几何的辅图像等效相位中心法.在此基础上给出了分布式卫星InSAR三维目标定位方程的高精度近似闭式解.理论分析及仿真实验结果验证了求取的近似闭合形式解的精确性.

关键词: 干涉合成孔径雷达, 数字高程模型, 分布式卫星, 定位, 近似闭式解

Abstract:

This paper deals with the geolocation problem resulting from the generation of digital elevation models (DEMs) via the distributed satellites interferometric synthetic aperture radar (DS-InSAR). Compared with the repeat-pass InSAR system, the slave SAR in the DS-InSAR system working in a bistatic mode possesses a more complicated focusing geometry, which makes it difficult to get the closed-form solution to geolocation equations. By utilizing the geometry of the master image, a novel equivalent phase center method for the distributed satellites InSAR geolocation is proposed. Accordingly, the quasi-closed-form solution with high accuracy is given. The accuracy of the quasi-closed-form solution is validated by theoretical analysis and simulation results.

Key words: interferometric synthetic aperture radar (InSAR), digital elevation model (DEM), distributed satellite, geolocation, quasi-closed-form solution

中图分类号: 

  • TN957