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

被引：4
|
作者：
Niu L. [1 ,2 ]
Liu H. [1 ]
Wu J. [1 ]
机构：
[1] Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing
[2] University of Chinese Academy of Sciences, Beijing
来源：
Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology | 2017年 / 39卷 / 08期
关键词：
High stability radiometer; L-band microwave radiometer; Noise injection radiometer; Ocean salinity;
D O I：
10.11999/JEIT161112
中图分类号：
学科分类号：
摘要：
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. © 2017, Science Press. All right reserved.
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页码：2028 / 2032
页数：4
相关论文
共 15 条
  • [1] Li Q., Zhang J., Guo W., Et al., Research progress of remote sensing of ocean salinity by microwave radiometer, Ocean Technology, 26, 3, pp. 8-12, (2007)
  • [2] McMullan K.D., Brown M.A., Martin-Neira M., Et al., SMOS: The payload, IEEE Transactions on Geoscience and Remote Sensing, 46, 3, pp. 594-605, (2008)
  • [3] Martin-Neira M., Oliva R., Corbella I., Et al., SMOS instrument performance and calibration after 6 years in orbit, Remote Sensing of Environment, 180, 8, pp. 19-39, (2016)
  • [4] Le Vine D.M., Lagerloef G.S.E., Colomb F.R., Et al., Aquarius: An instrument to monitor sea surface salinity from space, IEEE Transactions on Geosciences and Remote Sensing, 45, 7, pp. 2040-2050, (2007)
  • [5] Vine D.M.L., Dinnat E.P., Meissner T., Et al., Status of Aquarius/SAC-D and Aquarius salinity retrievals, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 8, 12, pp. 5401-5415, (2015)
  • [6] Yin X., Zhang Q., Wang R., Et al., Development status and trends of sea surface salt satellite, Spacecraft Engineering, 25, 1, pp. 119-123, (2016)
  • [7] Liu H., Zhu D., Niu L., Et al., MICAP (Microwave Imager Combined Active and Passive): A new instrument for Chinese ocean salinity satellite, Proceedings of IEEE International on Geoscience and Remote Sensing Symposium, pp. 184-187, (2015)
  • [8] Niu L., Liu H., Wu L., Et al., Experimental study of an L-band synthetic aperture radiometer for ocean salinity measurement, Proceedings of IEEE International on Geoscience and Remote Sensing Symposium, pp. 418-421, (2016)
  • [9] Li J., Zhang J., Zhao K., Real-time calibrated microwave radiometer, Journal of Electronics, 20, 2, pp. 285-288, (1998)
  • [10] Zhao K., Shi J., Zhang H., High sensitivity airborne L-band microwave radiometer measurements of sea surface salinity, Journal of Remote Sensing, 12, 2, pp. 277-283, (2008)
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