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A STUDY ON IN-ORBIT CALIBRATION FOR A SPACEBORNE DISTRIBUTED INTERFEROMETER
Lan, Ailan; Yan, Jingye; Wu, Lin; Zhao, Fei; Wu, Ji
作者部门微波遥感部
会议录名称IGARSS 2018 - 2018 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM
2018
页码1043-1046
语种英语
ISSN号2153-6996
ISBN号978-1-5386-7150-4
摘要For a spaceborne distributed interferometer, receiving channels are deployed on separated satellites. Traditional calibration methods for interferometers are not suitable for the new system. In this paper, a new calibration method, signal calibration, is proposed for the distributed interferometer. It is used to calibrate the transfer characteristics of channels, rather than power-voltage relationship. Moreover, the method is not limited by the size of array. The signal calibration can used as an internal calibration to reduce the impact of the discrepancy of receivers or an external calibration to correct the inter-satellite distance. To implement the internal calibration, a sine-wave calibration signal is produced by DAC for different receivers instead of the common noise to calibrate the gain and phase unbalance of the receivers in different satellites. To correct the inter-satellite distance, a double-frequency signal is generated, and by means of the phase lag difference between two frequencies the inter-satellite distance measurement error can be corrected.
关键词in-orbit calibration discrepancy inter-satellite distance spaceborne distributed interferometer
会议名称38th IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
会议日期JUL 22-27, 2018
会议地点Valencia, SPAIN
收录类别CPCI
文献类型会议论文
条目标识符http://ir.nssc.ac.cn/handle/122/6696
专题微波遥感部
推荐引用方式
GB/T 7714
Lan, Ailan,Yan, Jingye,Wu, Lin,et al. A STUDY ON IN-ORBIT CALIBRATION FOR A SPACEBORNE DISTRIBUTED INTERFEROMETER[C],2018:1043-1046.
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