Study On Ground Subsidence By Sentinnel-1 TOPS Mode Data

With the InSAR technology development,the enhance of the radar satalite design technology as well as the increased demand for large-area ground multitemporal monitor.Wide-format data mode in the appplication of monitoring will becoming more and more widely.The TOPS(terrain observation by progressive scans)mode Wide-format data collection from Sentinel-1 series satelite IW(Interferometric Wide Swath)Mode that launched by European Space Agency can width up to 250 Km.the TOPS mode data that collected by the atellite antennas' movement in the azimuth direction not only get wide data but also effectively eliminates the effect of scalloping to ScanSAR mode.Sentinel-1 TOPS mode data will be widely used in earthquake and volcanic activity,large region subsidence monitoring.This paper studied the characteristics of the data and registration requirements of the Sentinel-1 TOPS mode data,using time series observations on the ground.The main content of this paper is as follows:(1)The InSAR principle and the SAR Imaging modes had been introduced.Two wide format imaging mode(ScanSAR and TOPSAR)were be analysed and compared.The TOPS mode theoretical characteristics and the 1 per thousand regsitration accuracy theoretical were be analysed.(2)Geometric registration combined the ESD algorithms were proposed to make 1 per thousand regsitration accuracy.Geometric registration was used to make a primary registration,then the ESD method was be iterative processing,at the end the 1 per thousand registration requirement was be got.Two TOPS mode sentinel-1 data was be used in Taiwan earthquake to make a appropriate conclusions.(3)The Offset Tracking technology was be introduced and the Offset Tracking and the D-InSAR were be combined in this paper to study the deformation about the earthquake in Kumamoto,Japan.The deformation information in the Coherent region was be extracted by D-InSAR and the deformation information in the lost cost region was be extracted by offset tracking.A theory to remove the topographic was intruduced in this paper and used in the lost cost area to make a appropriate conclusions.(4)TOPS mode sentinel data was used by a time series analysis on peibei mining.Five mining which in the study area was be extracted and compared and the groundwater resources exploitation was be considered.(5)TOPS mode sentinel data was used by a time series analysis on cangzhou.The rhythm about the deformation in groundwater resources exploitation study region was be studyed.