A STUDY ON IN-ORBIT CALIBRATION FOR A SPACEBORNE DISTRIBUTED INTERFEROMETER

	A STUDY ON IN-ORBIT CALIBRATION FOR A SPACEBORNE DISTRIBUTED INTERFEROMETER
	Lan, Ailan; Yan, Jingye; Wu, Lin; Zhao, Fei; Wu, Ji
	2018
会议日期	JUL 22-27, 2018
会议地点	Valencia, SPAIN
关键词	in-orbit calibration discrepancy inter-satellite distance spaceborne distributed interferometer
页码	1043-1046
英文摘要	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.
会议录	IGARSS 2018 - 2018 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM
语种	英语
ISSN号	2153-6996
ISBN号	978-1-5386-7150-4
内容类型	会议论文
源URL	[http://ir.nssc.ac.cn/handle/122/6696]
专题	国家空间科学中心_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]. 见:. Valencia, SPAIN. JUL 22-27, 2018.