Geometric Calibration and Accuracy Verification of the GF-3 Satellite
AbstractThe GF-3 satellite is the first multi-polarization synthetic aperture radar (SAR) imaging satellite in China, which operates in the C band with a resolution of 1 m. Although the SAR satellite system was geometrically calibrated during the in-orbit commissioning phase, there are still some system errors that affect its geometric positioning accuracy. In this study, these errors are classified into three categories: fixed system error, time-varying system error, and random error. Using a multimode hybrid geometric calibration of spaceborne SAR, and considering the atmospheric propagation delay, all system errors can be effectively corrected through high-precision ground control points and global atmospheric reference data. The geometric calibration experiments and accuracy evaluation for the GF-3 satellite are performed using ground control data from several regions. The experimental results show that the residual system errors of the GF-3 SAR satellite have been effectively eliminated, and the geometric positioning accuracy can be better than 3 m. View Full-Text
Share & Cite This Article
Zhao, R.; Zhang, G.; Deng, M.; Xu, K.; Guo, F. Geometric Calibration and Accuracy Verification of the GF-3 Satellite. Sensors 2017, 17, 1977.
Zhao R, Zhang G, Deng M, Xu K, Guo F. Geometric Calibration and Accuracy Verification of the GF-3 Satellite. Sensors. 2017; 17(9):1977.Chicago/Turabian Style
Zhao, Ruishan; Zhang, Guo; Deng, Mingjun; Xu, Kai; Guo, Fengcheng. 2017. "Geometric Calibration and Accuracy Verification of the GF-3 Satellite." Sensors 17, no. 9: 1977.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.