Journal of Systems Engineering and Electronics ›› 2013, Vol. 24 ›› Issue (5): 761-771.doi: 10.1109/JSEE.2013.00089

• DEFENCE ELECTRONICS TECHNOLOGY • Previous Articles     Next Articles

Weighted joint calibration for interferometric SAR

Yongfei Mao1,2,∗, Maosheng Xiang1, Yunzhong Han2, and Wenjun Gao2   

  1. 1. National Key Laboratory of Science and Technology on Microwave Imaging, Institute of Electronics,
    Chinese Academy of Sciences, Beijing 100190, China;
    2. Beijing Institute of Spacecraft System Engineering, Beijing 100094, China
  • Online:2013-10-25 Published:2010-01-03


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 calibrates 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 threedimensional 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.