A Method of Radiometric Measurements of Cloud Attenuation

DUAN Miaomiao; MA Yingying; GONG Wei; WANG Lunche

doi:10.13203/j.whugis20130820

Volume 40 Issue 12

Dec. 2015

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Geomatics and Information Science of Wuhan University > 2015 > 40(12): 1606-1612. > DOI: 10.13203/j.whugis20130820

DUAN Miaomiao, MA Yingying, GONG Wei, WANG Lunche. A Method of Radiometric Measurements of Cloud Attenuation[J]. Geomatics and Information Science of Wuhan University, 2015, 40(12): 1606-1612. DOI: 10.13203/j.whugis20130820

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A Method of Radiometric Measurements of Cloud Attenuation

1.
State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China;
2.
The 2nd Institute of Surveying and Mapping of Hebei Province, Shijiazhuang 050000, China;
3.
School of Earth Sciences, China University of Geosciences, Wuhan 430074, China

Funds: The National Natural Science Foundation of China,Nos. 41401498,41127901;Program for Innovative Research Team in University of Ministry of Education of China, No.IRT1278;Specialized Research Fund for the Doctoral Program of Higher Education of China, No.20120141120040; Cheng Guang Project of Wuhan, No. 2014070404010198.

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Received Date: June 30, 2015
Published Date: December 04, 2015

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Abstract

Abstract

Cloud attenuation has a non-negligible impact on radio waves propagating over an earth-space path, especially in high frequency signals of the satellite communication system. A precise cloud attenuation method that has mid-latitude regions applicability is presented in this paper, using the HATPRO microwave radiometer's data particularly cloud liquid water density profiles. The result indicates that the effect of cloud attenuation enlarges rapidly as the frequency increases. More than 10 dB is caused due to cloud for 99.99% link availability at high bands. It is useful to relate the calculated cloud attenuation to integrated liquid water content,and the relationship is modeled by solid line. Predictions made with the method are compared with cloud attenuation data calculated by ITU-R (The ITU Radio communication sector) model, suggesting that the ITU-R model underestimates the effect of cloud attenuation in Wuhan area, resulting from the model's underestimation of integrated liquid water content.
- HATPRO microwave radiometer,
- cloud liquid water density,
- cloud attenuation,
- integrated liquid water content,
- ITU-R

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