Acquiring high-precision DEM in high altitude and cold area using InSAR technology

doi:10.13474/j.cnki.11-2246.2021.0076

Abstract

Abstract: Using Sentinel-1A SLC data as the original image, based on InSAR technology, the DEM data of the central small area located in West Tianshan, Xinjiang, a typically high and cold region is obtained in the paper. Then it compares the data with the commonly used SRTMDEM v4 DEM and GDEMDEM. The results show that:applying InSAR technology can obtain high-precision DEM with the resolution of 15 m by processing sentinel-1a SLC data. The DEM data precision is better than SRTM V4 DEM and GDEMDEM, which can better describe the details of the surface topography, can be used as input data to obtain high-precision deformation information of the ground, and can provide important basic data for engineering construction and geological disaster evaluation. In addition, this method is of great significance for DEM data updating.

Key words: InSAR, DEM, high and cold region, high-resolution, error analysis, engineering and geological hazard assessment

CLC Number:

P237

DU Qingsong, LI Guoyu, PENG Wanlin, ZHOU Yu, CHAI Mingtang, LI Jinming. Acquiring high-precision DEM in high altitude and cold area using InSAR technology[J]. Bulletin of Surveying and Mapping, 2021, 0(3): 44-49.

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