研究目的
To present the first results of repeat-pass bistatic SAR interferometry using a fixed ground-based receiver and Sentinel-1A/B satellites as transmitters, and to estimate displacements of a high-rise building.
研究成果
The methodology successfully generated repeat-pass bistatic SAR interferograms and estimated building displacements correlated with temperature variations, demonstrating the feasibility of exploiting multiple orbits and sub-swaths in bistatic geometry for enhanced imaging parameters.
研究不足
The study is preliminary with first results; potential limitations include atmospheric homogeneity assumption, phase wrap issues, and correlation variations between different orbits. Future work is needed for in-situ validation and combining signals from different orbits/sub-swaths.
1：Experimental Design and Method Selection:
The methodology involves generating repeat-pass bistatic SAR interferograms from range compressed data, including raw interferogram computation, atmospheric phase screen removal, and topographic phase compensation.
2：Sample Selection and Data Sources:
Data acquired from Sentinel-1A/B satellites over Bucharest, Romania, between April-June 2017, focusing on a high-rise building.
3：List of Experimental Equipment and Materials:
Ground-based receiver with two channels (reference and imaging), Sentinel-1A/B satellites.
4：Experimental Procedures and Operational Workflow:
Steps include selection of common pulses, back-projection focusing, coregistration, PS selection, APS removal, and topographic phase compensation.
5：Data Analysis Methods:
Use of amplitude dispersion index for PS selection, cost function minimization for APS estimation, and conversion to bistatic distances.
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