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基于重构距离向分谱法的时序InSAR电离层校正及分析

毛文飞 王晓文 刘国祥 杨友涛 向卫 蔡嘉伦 符茵 张瑞

毛文飞, 王晓文, 刘国祥, 杨友涛, 向卫, 蔡嘉伦, 符茵, 张瑞. 基于重构距离向分谱法的时序InSAR电离层校正及分析[J]. 西南交通大学学报. doi: 10.3969/j.issn.0258-2724.20210541
引用本文: 毛文飞, 王晓文, 刘国祥, 杨友涛, 向卫, 蔡嘉伦, 符茵, 张瑞. 基于重构距离向分谱法的时序InSAR电离层校正及分析[J]. 西南交通大学学报. doi: 10.3969/j.issn.0258-2724.20210541
MAO Wenfei, WANG Xiaowen, LIU Guoxiang, YANG Youtao, XIANG Wei, CAI Jialun, FU Yin, ZHANG Rui. Ionospheric Correction and Analysis for Time-series InSAR Based on Reformulating Range Split Spectrum Interferometry[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20210541
Citation: MAO Wenfei, WANG Xiaowen, LIU Guoxiang, YANG Youtao, XIANG Wei, CAI Jialun, FU Yin, ZHANG Rui. Ionospheric Correction and Analysis for Time-series InSAR Based on Reformulating Range Split Spectrum Interferometry[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20210541

基于重构距离向分谱法的时序InSAR电离层校正及分析

doi: 10.3969/j.issn.0258-2724.20210541
基金项目: 国家自然科学基金(41804009, 42071410, 41771402);四川省科技计划(2020YJ0322, 2020JDTD0003, 2018JY0664, 2019ZDZX0042, 2020JDTD0003, 2020YJ0322)
详细信息
    作者简介:

    毛文飞(1990—),男,博士研究生,研究方向为InSAR电离层估计与校正及形变监测与分析,E-mail:wenfeimao@my.swjtu.edu.cn

    通讯作者:

    张瑞(1982—),男,副教授,博士,研究方向为定量遥感和合成孔径雷达干涉测量,E-mail:zhangrui@swjtu.edu.cn

  • 中图分类号: P237

Ionospheric Correction and Analysis for Time-series InSAR Based on Reformulating Range Split Spectrum Interferometry

  • 摘要:

    合成孔径雷达干涉技术(InSAR)受电离层延迟影响较大,特别是在低高纬地区,用于时序InSAR解算的干涉对数量大大减少,严重影响了低频合成孔径雷达(SAR)系统的监测精度. 针对该问题,引入重构距离向分谱法(RRSSI),将其扩展为时序InSAR电离层误差估计与校正方法. 为测试方法性能,获取2006年6月至2010年8月间覆盖阿拉斯加Anaktuvuk河区域的ALOS-1 PALSAR数据进行实验. 实验结果表明:本文方法能够有效估计时序InSAR结果中的电离层误差,且对小空间尺度电离层扰动具有较高的敏感性;经提出方法校正后,研究区域的年平均形变速率均值从校正前的1.46 cm/a降至0.49 cm/a,而标准差则从1.16 cm/a降至0.65 cm/a,精度显著提升;选取时序点的累积形变由校正前的大幅波动变得更加平稳,更符合形变规律.

     

  • 图 1  时序InSAR电离层延迟估计与校正

    Figure 1.  Delay estimation and correction for time-series InSAR ionospheric

    图 2  研究区域及SAR数据覆盖范围

    Figure 2.  Study area and SAR data coverage

    图 3  电离层校正前后的重缠绕差分InSAR干涉图

    Figure 3.  Rewrapped differential InSAR interferograms before and after ionospheric correction

    图 4  年平均形变速率及统计

    Figure 4.  Average annual deformation rate and statistics

    图 5  时序点的累积形变曲线

    Figure 5.  Cumulative deformation curve of time series points

    图 6  RRSSI方法与RSSI方法的电离层校正对比

    Figure 6.  Comparison of ionospheric correction between RRSSI method and RSSI method

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出版历程
  • 收稿日期:  2021-07-05
  • 录用日期:  2024-03-04
  • 修回日期:  2022-01-07
  • 网络出版日期:  2024-03-20

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