Analysis and Modeling of Baseline Errors of Airborne ATI-SAR

Konferenz: EUSAR 2012 - 9th European Conference on Synthetic Aperture Radar
23.04.2012 - 26.04.2012 in Nuremberg, Germany

Tagungsband: EUSAR 2012

Seiten: 4Sprache: EnglischTyp: PDF

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Wang, Xin (Key Lab of Tech. in Geo-spatial Info. Processing & App. System, Inst. of Electronics, Chinese Acad. of Sci., China)
Hong, Jun; Hu, Jiwei; Ming, Feng (National Key Lab of Microwave Imaging Technology, Institute of Electronics, Chinese Academy of Sciences, China)

Along-track interferometric synthetic aperture radar (ATI-SAR) is used in ground-moving targets indication (GMTI) and in speed and position acquirement. Errors of interferometric parameters largely affect the precision of measuring speed; therefore, analyzing these errors is helpful for the study of calibration techniques. In this paper, by analyzing the sensitivity of speed to parameters, we firstly reach the conclusion that the speed is very sensitive to baseline vectors so that it needs to be considered in the interferometric calibration. Then mathematical models are established for baseline error sources. At last, we come to a series of beneficial conclusions.