Research and Experimental Verification on High Sensitivity and High Stability Microwave Radiometer

NIU Lijie; LIU Hao; WU Ji

doi:10.11999/JEIT161112

Volume 39 Issue 8

Aug. 2017

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NIU Lijie, LIU Hao, WU Ji. Research and Experimental Verification on High Sensitivity and High Stability Microwave Radiometer[J]. Journal of Electronics & Information Technology, 2017, 39(8): 2028-2032. doi: 10.11999/JEIT161112

Citation:

NIU Lijie, LIU Hao, WU Ji. Research and Experimental Verification on High Sensitivity and High Stability Microwave Radiometer[J]. Journal of Electronics & Information Technology, 2017, 39(8): 2028-2032. doi: 10.11999/JEIT161112

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Research and Experimental Verification on High Sensitivity and High Stability Microwave Radiometer

doi: 10.11999/JEIT161112

1.
2.
(Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China)

Received Date: 2016-10-20
Rev Recd Date: 2017-02-21
Publish Date: 2017-08-19

Abstract

Abstract

Global measurement of ocean salinity using satellite borne synthetic aperture radiometer is one of the research focuses in the field of microwave remote sensing. In order to achieve the accuracy of the ocean salinity detection, the radiometer units of the synthetic aperture radiometer need to have very high sensitivity and very high calibration stability. In this paper, the technique of the radiometer with high sensitivity and high stability is researched. High stability is realized by the real-time calibration method, and the sensitivity is effectively improved by the calibration data average technology. The optimal average time is obtained by the frequency domain analysis for the first time. Long time stability experiments are completed to demonstrate its performance. Experimental results show that the stability of this L-band radiometer reaches 0.12 K (in 3 days), and the sensitivity reaches 0.1 K, which can reach the requirement of the synthetic aperture radiometer for ocean salinity detection.
- High stability radiometer,
- L-band microwave radiometer,
- Noise injection radiometer,
- Ocean salinity

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References(19)

References

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