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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
Department微波遥感部
Source PublicationIGARSS 2018 - 2018 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM
2018
Pages1043-1046
Language英语
ISSN2153-6996
ISBN978-1-5386-7150-4
AbstractFor 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.
Keywordin-orbit calibration discrepancy inter-satellite distance spaceborne distributed interferometer
Conference Name38th IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
Conference DateJUL 22-27, 2018
Conference PlaceValencia, SPAIN
Indexed ByCPCI
Document Type会议论文
Identifierhttp://ir.nssc.ac.cn/handle/122/6696
Collection微波遥感部
Recommended Citation
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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