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

NSSC OpenIR > 微波遥感部

	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.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
201808517668.pdf（468KB）	会议论文		开放获取	CC BY-NC-SA	请求全文