Using the ITU-R rain attenuation forecasting model,and based on the rainfall data and the geographic location parameters of main cities in our country,the isograms of rain attenuation distribution for the communication satellite with the orbital location 92° E in Ka band(30/20GHz)was presentd.

In order to keep the transmission quality of satellite communication,and based on the analysis of rain data of China,picture of rain attenuation contours can be calculated.

A new prediction model of rain attenuation of terrestrial line-of-sight systems;

An earth-space path rain attenuation model based on evolutionay neural network;

Prediction model of rain attenuation based on the EXCELL rain cell model for the terrestrial line-of-sight systems

A new model is developed for the computation of rain specific attenuation from rain volume reflectivity,for frequencies from 1 GHz to 100 GHz,and the radar equation,maximum range and signal-to-noise ratio and signal-to-clutter ratio in rain have also been analyzed herein.