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中国科学院大学学报 ›› 2019, Vol. 36 ›› Issue (2): 280-288.DOI: 10.7523/j.issn.2095-6134.2019.02.017

• 简报 • 上一篇    

一种基于普通分布目标的极化SAR幅相不平衡快速评价方法

蒋莎1,2, 仇晓兰1, 韩冰1, 胡文龙1, 卢晓军3   

  1. 1. 中国科学院电子学研究所 中国科学院空间信息处理与应用系统技术重点实验室, 北京 100190;
    2. 中国科学院大学, 北京 100190;
    3. 中国国际工程咨询有限公司, 北京 100048
  • 收稿日期:2018-01-04 修回日期:2018-03-30 发布日期:2019-03-15
  • 通讯作者: 仇晓兰
  • 基金资助:
    国家自然科学基金(61331017)和高分3号卫星应用共性关键技术项目(30-Y20A12-9004-15/16,03-Y20A11-9001-15/16)资助

A fast evaluation method of channel imbalance of polarimetric SAR based on common distributed targets

JIANG Sha1,2, QIU Xiaolan1, HAN Bing1, HU Wenlong1, LU Xiaojun3   

  1. 1. Key Laboratory of Spatial Information Processing and Application System Technology of CAS, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
    2. University of Chinese Academy of Sciences, Beijing 100190, China;
    3. China International Engineering Consulting Corporation, Beijing 100048, China
  • Received:2018-01-04 Revised:2018-03-30 Published:2019-03-15

摘要: 目前,有多种算法利用定标场和布设的定标器估算幅相不平衡,但基于定标场和定标器的方法存在时间和空间上的局限性,不能满足常态化极化质量监测的需求。基于地物的散射统计特性,提出一种基于普通分布目标的极化SAR幅相不平衡快速评价方法。给出该方法对地物散射特性的要求,并采用统计计算的策略,降低方法对地物的要求。该方法能够实现幅相不平衡的便捷常态化评估。半物理仿真实验和GF-3实测数据实验验证了该方法的有效性。

关键词: 合成孔径雷达, 极化SAR, 质量评价, 幅相不平衡

Abstract: There are a variety of algorithms in which the calibrated field and calibrator are used to calculate the channel imbalance, but they do not meet the need of normalized quality monitoring because of the limitations to area and revisit frequency. In this work, based on the statistical properties of ground objects' scattering, a fast evaluation method of channel imbalance of polarimetric SAR based on common distributed targets is proposed. The requirements of the method on the scattering characteristics of ground objects are deduced, and the statistical calculation methods are adopted to reduce the requirements. This method achieves the convenient and normalized evaluation of channel imbalance. The experiments of semi-physical simulation and of GF-3 measured data verify the effectiveness of the method.

Key words: SAR, pol SAR, quality evaluation, channel imbalance

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