Title:
INSAR AND GNSS WEIGHTING METHOD FOR THREE-DIMENSIONAL EARTH SURFACE DEFORMATION ESTIMATION
Document Type and Number:
WIPO Patent Application WO/2020/233591
Kind Code:
A1
Abstract:
Disclosed is an InSAR and GNSS weighting method for three-dimensional earth surface deformation estimation, including the following steps: step 1: establishing a functional relationship between a three-dimensional deformation d 0 of an unknown point and a certain amount of InSAR/GNSS data L i of surrounding points based on an earth surface stress-strain model and an observed value imaging geometry by using the ascending and descending InSAR data and the GNSS data of an area to be monitored; step 2: performing relative weighting on K i observed data inside the observed value L i of the ascending and descending InSAR and GNSS, and determining an initial weight matrix W i of various observed values of InSAR/GNSS; step 3: determining the precise weight matrix equation (I) between various observed values of InSAR/GNSS by using variance component estimation, and solving the high-precision three-dimensional earth surface deformation d 0 based on the criterion of least squares; and step 4: making each earth surface point undergo the above steps 1-3 to realize the fusion of InSAR and GNSS to estimate a high-precision three-dimensional earth surface deformation field.
Inventors:
HU JUN (CN)
LIU JIHONG (CN)
LI ZHIWEI (CN)
ZHU JIANJUN (CN)
LIU JIHONG (CN)
LI ZHIWEI (CN)
ZHU JIANJUN (CN)
Application Number:
PCT/CN2020/091273
Publication Date:
November 26, 2020
Filing Date:
May 20, 2020
Export Citation:
Assignee:
UNIV CENTRAL SOUTH (CN)
International Classes:
G01S13/90; G01B15/06
Foreign References:
| CN110058236A | 2019-07-26 | |||
| CN107102332A | 2017-08-29 | |||
| CN104699966A | 2015-06-10 | |||
| US20090237297A1 | 2009-09-24 |
Other References:
LIU, JIHONG ET AL.: "A Method for Measuring 3-D Surface Deformations With InSAR Based on Strain Model and Variance Component Estimation", 《IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING》, vol. 56, no. 1,, 31 January 2018 (2018-01-31), XP55755606, ISSN: 0196-2892, DOI: 20200728095059A
HU, JUN ET AL.: "Three-Dimensional Surface Displacements From InSAR and GPS Measurements With Variance Component Estimation", 《IEEE GEOSCIENCE AND REMOTE SENSING LETTERS》, vol. 9, no. 4,, 31 July 2012 (2012-07-31), XP011448385, ISSN: 1545-598X, DOI: 20200728095337A
HU, JUN ET AL.: "Three-Dimensional Surface Displacements From InSAR and GPS Measurements With Variance Component Estimation", 《IEEE GEOSCIENCE AND REMOTE SENSING LETTERS》, vol. 9, no. 4,, 31 July 2012 (2012-07-31), XP011448385, ISSN: 1545-598X, DOI: 20200728095337A
Attorney, Agent or Firm:
CHANGSHA XUAN RONG PATENT AGENCY CO., LTD. (CN)
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