Joint Calibration Method of Airborne Dual-antenna Interferometric SAR

doi:10.13485/j.cnki.11-2089.2014.0139

Abstract

Abstract: In order to improve the accuracy of DEM acquired by InSAR, every flight should fly pass the calibration filed, which required surveyors needed to lay corner reflectors repeatedly. Because laying reflectors repeatedly outside wastes time and human resources, a new joint calibration method of airborne dual-antenna InSAR was presented. The method could calibrate interferometric system parameters of multi-flight with laying reflectors one time and reduce the outside workload. At first, the method selected interferometric calibration parameters suited for airborne dual-antenna InSAR data based on the sensitivity equations calibration method, then it brought the local registration method and PS selection method in PSInSAR to select height connection points connected height data with multi-flight data in same area. Finally, it established respective error equations according to the height attribute difference between control points and connection points and formed joint calibration model using the above equations, after that, this paper proved the correctness and effectiveness of the new algorithm with CASMSAR-X data of China Surveying and Mapping Academy.

Key words: airborne InSAR, 3D construction model, interferometric calibration parameters, repeat-pass, height connection point, joint calibration

CLC Number:

P236

WANG Mengmeng, HUANG Guoman, HUA Fenfen, WEI Jujie, LU Lijun. Joint Calibration Method of Airborne Dual-antenna Interferometric SAR[J]. Acta Geodaetica et Cartographica Sinica, 2014, 43(12): 1259-1265.

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