Deformation extraction of Jinchuan mining area using DS-InSAR with Sentinel-1A ascending and descending orbit

doi:10.13474/j.cnki.11-2246.2025.0301

Abstract

Abstract: The Jinchuan mining area is extremely rich in nickel resources and is the largest nickel metal origin in China. The traditional PS-InSAR method has many problems such as low target point density, deformation area unwrapping errors, and low extraction accuracy of deformation results in the Jinchuan mining area. This paper adopts the advanced DS-InSAR method to process three groups of Sentinel-1A data from different orbits(ascending orbit Path 128, descending orbit Path 33, and descending orbit Path 135) from August 2021 to June 2022. The results are compared with the traditional PS-InSAR method in terms of monitoring point density. The deformation results extracted from the two types of time-series InSAR are cross-validated against the GNSS sites monitoring results. The results show that: ①The MPS density for the mining body monitoring in the Jinchuan mining area is at least 5 times higher than the PS-InSAR method. ②The time-series deformation results solved by DS-InSAR and PS-InSAR are compared with the GNSS sites time-series deformation results in terms of mean absolute error, root mean square error, and Pearson correlation. The three groups of indicators quantitatively reflect that DS-InSAR has the better performance and indicates the deformation results extracted by DS-InSAR are more accurate.

Key words: ascending and descending orbit, Jinchuan mining area, Sentinel-1A, DS-InSAR, GNSS

CLC Number:

P237

GUO Jie, ZHANG Gonghai, SONG Yewei, BAI Yuxing, HU Jiyuan, WANG Jie, WU Wenhao, GE Zixuan. Deformation extraction of Jinchuan mining area using DS-InSAR with Sentinel-1A ascending and descending orbit[J]. Bulletin of Surveying and Mapping, 2025, 0(3): 1-7.

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