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Calibration Analyses for Sounding Channels of MWHS Onboard FY-3A
Gu, Songyan; Guo, Yang; Wang, Zhenzhan; Lu, Naimeng; Gu, SY (reprint author), China Meteorol Adm, Key Lab Radiometr Calibrat & Validat Environm Sat, Beijing 100081, Peoples R China.
Department微波遥感部
Source PublicationIEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
2012
Volume50Issue:12Pages:4885-4891
ISSN0196-2892
Language英语
KeywordCalibration Cross Comparison Fy-3a Mwhs
AbstractThe Microwave Humidity Sounder (MWHS) is a five-channel microwave radiometer in the range of 150-191 GHz onboard FengYun 3 (FY-3). Before the launch of FY-3A, the intensive thermal vacuum (TVAC) tests for MWHS had been carried out in a 2-m TVAC chamber, and the basic parameters such as receiver nonlinearity were obtained. Four-year operation shows that the performance of FY-3A MWHS remains stabile. The variations among space views and warm target views in the interval of scan lines were generally within 20 counts. In addition, the temperature fluctuation of the warm target in a single pass is within 0.5 K. Primarily, due to the nonlinearity correction obtained from the TVAC test, radiance measurements of MWHS agree well with NOAA-17 AMSU-B and NOAA-18 Microwave Humidity Sounder (MHS) data. Averaged brightness temperature differences between FY-3 MWHS and NOAA-17 AMSU-B, at simultaneous cross-overpass points, are less than 1.08 K for the channels at 183 +/- 1 GHz. In the observation-minus-background comparison, the observed and simulated brightness temperature biases of FY-3 MWHS and NOAA-18 MHS exhibit similar performance in the 183.31 +/- 1 GHz channel; but in the 183.31 +/- 7 GHz channel, MWHS agrees better with background. It is anticipated that FY-3 MWHS data will contribute to numerical weather prediction.; The Microwave Humidity Sounder (MWHS) is a five-channel microwave radiometer in the range of 150-191 GHz onboard FengYun 3 (FY-3). Before the launch of FY-3A, the intensive thermal vacuum (TVAC) tests for MWHS had been carried out in a 2-m TVAC chamber, and the basic parameters such as receiver nonlinearity were obtained. Four-year operation shows that the performance of FY-3A MWHS remains stabile. The variations among space views and warm target views in the interval of scan lines were generally within 20 counts. In addition, the temperature fluctuation of the warm target in a single pass is within 0.5 K. Primarily, due to the nonlinearity correction obtained from the TVAC test, radiance measurements of MWHS agree well with NOAA-17 AMSU-B and NOAA-18 Microwave Humidity Sounder (MHS) data. Averaged brightness temperature differences between FY-3 MWHS and NOAA-17 AMSU-B, at simultaneous cross-overpass points, are less than 1.08 K for the channels at 183 +/- 1 GHz. In the observation-minus-background comparison, the observed and simulated brightness temperature biases of FY-3 MWHS and NOAA-18 MHS exhibit similar performance in the 183.31 +/- 1 GHz channel; but in the 183.31 +/- 7 GHz channel, MWHS agrees better with background. It is anticipated that FY-3 MWHS data will contribute to numerical weather prediction.
Indexed BySCI ; EI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/3460
Collection微波遥感部
Corresponding AuthorGu, SY (reprint author), China Meteorol Adm, Key Lab Radiometr Calibrat & Validat Environm Sat, Beijing 100081, Peoples R China.
Recommended Citation
GB/T 7714
Gu, Songyan,Guo, Yang,Wang, Zhenzhan,et al. Calibration Analyses for Sounding Channels of MWHS Onboard FY-3A[J]. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,2012,50(12):4885-4891.
APA Gu, Songyan,Guo, Yang,Wang, Zhenzhan,Lu, Naimeng,&Gu, SY .(2012).Calibration Analyses for Sounding Channels of MWHS Onboard FY-3A.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,50(12),4885-4891.
MLA Gu, Songyan,et al."Calibration Analyses for Sounding Channels of MWHS Onboard FY-3A".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 50.12(2012):4885-4891.
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