Analysis of tropospheric scintillation due to clear-air and meteorological elements on slant microwave links

Ruike Yang; ZhenSen Wu; Yingle Li

doi:10.1117/12.466582

14 April 2003 Analysis of tropospheric scintillation due to clear-air and meteorological elements on slant microwave links

Ruike Yang, ZhenSen Wu, Yingle Li

Author Affiliations +

Proceedings Volume 4899, Atmospheric and Oceanic Processes, Dynamics, and Climate Change; (2003) https://doi.org/10.1117/12.466582
Event: Third International Asia-Pacific Environmental Remote Sensing Remote Sensing of the Atmosphere, Ocean, Environment, and Space, 2002, Hangzhou, China

Abstract

Analysis of log-amplitude scintillation due to troposphere clear-air turbulent and meteorological parameters variation is shown at microwaves (MW) on slant paths, based on ITU-R turbulence atmosphere structure parameter, temperature and relative humidity along vertical path. Comparisons of Karasawa model based on the data obtained from a low-elevation microwave propagation experiment and ITU-R Recommendation model prediction results with evaluation results are shown and discussed. The results show that although the relative humidity effected on optical refractive index of a cell is not principally element at optical wave band, at microwave and millimeter-wave band, the relative humidity and temperature is the major factor impacted on log-amplitude scintillation. Hence, the variations of temperature and relative humidity with height, which can be obtained by experiment (or test) and weather observation method is important for low-elevation satellite communication and microwave remote sensing. A atmosphere structure constant C_n² model, which varies with height, is presented based on ITU-R and Karasawa amplitude scintillation model, existing ITU-R C_n² model for optical and meteorologic measured relative humidity and temperature data, at 10~30GHz. In this C_n² model it is considered that relative humidity and temperature varies with height. The log-amplitude scintillation deviation calculated in terms of the C_n² model based on humidity and temperature vertical profile compare with values predicted by means of ITU-R and Ortgies model applied to Italsat channels. It is emerged that the calculation results based on the C_n² model agree almost with prediction results by ITU-R and Ortgies model at 10~30GHz and there is an advantage that relative humidity and temperature varied with height has be considered in the C_n² model. Therefore, it is shown that the C_n² model is usable and is more practical.

Citation Download Citation

Ruike Yang, ZhenSen Wu, and Yingle Li "Analysis of tropospheric scintillation due to clear-air and meteorological elements on slant microwave links", Proc. SPIE 4899, Atmospheric and Oceanic Processes, Dynamics, and Climate Change, (14 April 2003); https://doi.org/10.1117/12.466582

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