12GHz地空降雨衰减——三年实验和研究总结

12GHz地空降雨衰减——三年实验和研究总结 RAIN ATTENUATION ON EARTH-SPACE PATH AT 12GHz—SUMMARY OF 3 YEARS EXPERIMENTS AND STUDIES 张长清 first-author 李焕矩 张贵付 黄润生 严云英 本文全面地总结了在武汉所进行的为期三年的12GHz地空降雨衰减实验研究。尤其是后两年用无源辐射计所进行的测量。在处理和分析这两年的降雨衰减实验数据中,利用辐射传输理论,考虑了雨滴散射和雨温随高度分布,研究了雨介质的特性并把它运用到计算地空降雨衰减中,给出了降雨衰减、最坏月分及相应降雨率的累积分布、持续时间和有效路径长度。文中还给出了具有较为普遍应用价值的降雨衰减预报模式。预报结果表明;预报值与实测值符合得相当好并优于CCIR的预报估算。 The experimental results of three years of rain attenuation measurements at 12GHz along earth-space path in Wuhan are summarized. The data obtained from a passive radiometer in last two years are analysed especially. The cumulative distributions of rain attenuation, rainfall rates, worst months, durations and the effective path lengths are given. In addition, the model for prediction of rain attenuation is also given. The results of prediction by this model show that the attenuation prediction agrees well with the measurements and is much better than those obtained by CCIR model. 降雨衰减 降雨率 时间百分数 rain attenuation rainfall rates percentages of time 1987-01-01 2021-04-01 1