The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Articles | Volume XLIII-B3-2020
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLIII-B3-2020, 313–318, 2020
https://doi.org/10.5194/isprs-archives-XLIII-B3-2020-313-2020
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLIII-B3-2020, 313–318, 2020
https://doi.org/10.5194/isprs-archives-XLIII-B3-2020-313-2020

  21 Aug 2020

21 Aug 2020

LAND SUBSIDENCE MONITORING WITH MULTI-TRACK SAR DATA

X. Li1, L. Yan1, and G. Huang2 X. Li et al.
  • 1School of Geodesy and Geomatics, Wuhan University, Wuhan, China
  • 2Key Laboratory of Earth Observation and Geospatial Information Science of NASG, Chinese Academy of Surveying and Mapping, Beijing, China

Keywords: Land Subsidence, Multi-track, NSBAS, Validation, Hebei Plain

Abstract. In this study, we investigated wide-area land subsidence in Hebei Plain using 78 C-band Sentinel-1A SAR images acquired from May 2017 to May 2018 covering two tracks. High-precision time series retrieval was performed by NSBAS technology based on a single track. The offset deformation values of two tracks calculated in this paper were −0.09 mm/year, and the multi-track deformation rate was successfully merged. Using the cross-validation of redundant observations in the multi-track overlap area to evaluate the accuracy, and it was found that 90% pixel difference between the two track overlap areas was within 9 mm. The standard deviation was 5.38 mm, and the subsidence trend of the overlap area was consistent. Twenty-four subsidence bowls were extracted, and the maximum subsidence rate reached −62 mm/year.