测绘通报 ›› 2021, Vol. 0 ›› Issue (12): 38-43.doi: 10.13474/j.cnki.11-2246.2021.369

• 学术研究 • 上一篇    下一篇

利用基于抗差垂直向方差分量估计的GPS-InSAR数据融合方法反演三维形变场

吴学雨1, 李明峰1, 董思学2, 王彬1, 赵志胜1   

  1. 1. 南京工业大学测绘科学与技术学院, 江苏 南京 211816;
    2. 浙江省测绘科学技术研究院, 浙江 杭州 310012
  • 收稿日期:2020-12-08 修回日期:2021-04-28 发布日期:2021-12-30
  • 通讯作者: 董思学。E-mail:danel2006@163.com
  • 作者简介:吴学雨(1996-),男,硕士生,研究方向为InSAR数据处理与应用。E-mail:wuxueyu0113@163.com
  • 基金资助:
    国家自然科学青年基金(42004002);江苏省自然科学基金青年基金(BK20180720)

GPS-InSAR data fusion method with robust vertical variance component estimation for 3D deformation field

WU Xueyu1, LI Mingfeng1, DONG Sixue2, WANG bin1, ZHAO Zhisheng1   

  1. 1. School of Geomatics Science and Technology, Nanjing Tech University, Nanjing 211816, China;
    2. Zhejiang Academy of Surveying and Mapping, Hangzhou 310012, China
  • Received:2020-12-08 Revised:2021-04-28 Published:2021-12-30

摘要: GPS-InSAR数据融合解算三维形变场模型易受观测值粗差影响,且基于方差分量估计的定权方法不具备抵御粗差能力,计算效率低下。鉴于此,本文提出了一种基于抗差垂直向方差分量估计的GPS-InSAR融合解算模型,利用方差分量估计方法及抗差估计理论,通过对观测值最优化分类并进行选权迭代,精确分配权重,进而有效计算三维形变场。试验结果表明,该方法能有效抵御观测值粗差不利影响,提高三维形变场反演精度,提升逐点式计算的三维形变场效率。

关键词: 方差分量估计, 抗差估计, 三维形变场, GPS-InSAR数据融合

Abstract: It is easily affected for the three-dimensional deformation field model of GPS-InSAR data fusion by the gross error of the observation value. The weighting method based on the Helmert variance component estimation cannot be used to resist gross errors and the calculation efficiency is low. In view of this, a method based on the GPS-InSAR fusion solution model for robust vertical variance component estimation is proposed. The variance component estimation method and the robust estimation theory are used to calculate the 3D deformation field effectively by optimizing the classification of the observed values and carrying out the weight selection iteration to allocate the weight accurately. Experimental results show that it is effectively resisted the influence of gross errors in observations by this way. The accuracy of 3D deformation field inversion and the efficiency of 3D deformation field calculated point by point is effectively improved.

Key words: variance component estimation, robust estimation, 3D deformation field, GPS-InSAR data fusion

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