Survey and Analysis of Large-scale Ground Disaster Based on D-InSAR Technology——Taking Ya'an as an Example
To meet the need of regional geological disaster survey,the study made use of Sentinel-1 satellite image data and employed Differential Interferometric Synthetic Aperture Radar(D-InSAR)technology through two-pass method to acquire large-scale surface deformation information in Ya'an area from October 2023 to December 2023.The processing results showed that during the image coverage period,the settlement deformation in Ya'an area was mainly concentrated in the east and south,with the maximum surface settlement of 6.7 cm.D-InSAR technology can provide high-precision and large-scale deformation information for geological disaster survey.
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