Accuracy analysis of topographic interferometry based on multi-source spaceborne SAR

doi:10.13474/j.cnki.11-2246.2020.0206

Abstract

Abstract: Spaceborne InSAR technology has been one of the hotspots in topographic surveying and mapping. Its advantages lie in that it can obtain global DEM data and other value-added products quickly and accurately. For providing a technical reference to the global mapping task, the multi-source spaceborne SAR image data are applied in implementing terrain interferometry experiment and accuracy analysis. The results indicated that the main SAR image data, including COSMO-SkyMed, GF-3 and ALOS-2 corresponding to the existing spaceborne X/C/L-bands SAR systems, could obtain high-quality DEM data products in the typical study area of Qinghai province. The accuracy and detail quality of DEM obtained by COSMO-SkyMed interferometry are higher relatively, followed by the GF-3 result, and the ALOS-2 result also has enough precision. The related results demonstrated from the side that, national GF-3 spaceborne SAR system has enough potential power in topographic interferometry, but the suitable spatial baseline is needed.

Key words: spaceborne SAR, InSAR, topographic survey, DEM, accuracy analysis

CLC Number:

P237

CHEN Lijun, ZHANG Rui, GUO Xudong, HONG Kairui, TU Jinsheng. Accuracy analysis of topographic interferometry based on multi-source spaceborne SAR[J]. Bulletin of Surveying and Mapping, 2020, 0(7): 13-17.

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