| 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 Publication | IGARSS 2018 - 2018 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM |
| 2018 | |
| Pages | 1043-1046 |
| Language | 英语 |
| ISSN | 2153-6996 |
| ISBN | 978-1-5386-7150-4 |
| Abstract | 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. |
| Keyword | in-orbit calibration discrepancy inter-satellite distance spaceborne distributed interferometer |
| Conference Name | 38th IEEE International Geoscience and Remote Sensing Symposium (IGARSS) |
| Conference Date | JUL 22-27, 2018 |
| Conference Place | Valencia, SPAIN |
| Indexed By | CPCI |
| Document Type | 会议论文 |
| Identifier | http://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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| File Name/Size | DocType | Version | Access | License | ||
| 201808517668.pdf（468KB） | 会议论文 | 开放获取 | CC BY-NC-SA | View Download | ||
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