Calibration is a processing procedure for across-track interferometric synthetic aperture radar (InSAR) to achieve an accurate three-dimensional location. A calibration technique, called weighted joint calibration, ...Calibration is a processing procedure for across-track interferometric synthetic aperture radar (InSAR) to achieve an accurate three-dimensional location. A calibration technique, called weighted joint calibration, for the generation of wide-area geocoded digital elevation models (DEMs) is proposed. It cali- brates multiple InSAR scenes simultaneously, and allows reducing the number of required ground control points (GCPs) by using tie points (TPs). This approach may ensure the continuity of three- dimensional location among adjacent scenes, which is necessary for mosaic and fusion of data coming from different scenes. In addition, it introduces weights to calibration to discriminate GCPs and TPs with different coherences and locations. This paper presents the principles and methodology of this weighted joint calibration technique and illustrates its successful application in airborne In- SAR data.展开更多
基金supported in part by the National High-Tech Research and Development Program of China(863 Program)(2007AA120302)the National Basic Research Program of China(973 Program)(2009CB724003)
文摘Calibration is a processing procedure for across-track interferometric synthetic aperture radar (InSAR) to achieve an accurate three-dimensional location. A calibration technique, called weighted joint calibration, for the generation of wide-area geocoded digital elevation models (DEMs) is proposed. It cali- brates multiple InSAR scenes simultaneously, and allows reducing the number of required ground control points (GCPs) by using tie points (TPs). This approach may ensure the continuity of three- dimensional location among adjacent scenes, which is necessary for mosaic and fusion of data coming from different scenes. In addition, it introduces weights to calibration to discriminate GCPs and TPs with different coherences and locations. This paper presents the principles and methodology of this weighted joint calibration technique and illustrates its successful application in airborne In- SAR data.