为精确地实现Ka频段星地链路降雨衰减的短时趋势和强度预测,提出了一种基于数值天气预报的降雨衰减短时预测方法,设计了降雨衰减预测流程,并应用上述方法对某地区发生的降雨过程进行研究,比较分析了降雨衰减的实测值和基于数值预报的降雨衰减预测值.试验结果表明,基于数值预报的降雨衰减和实测值变化趋势符合较好,误差较小,在20 GHz频段平均误差约为1.31 dB,在30 GHz频段平均误差约为2.39 dB,在20 GHz频段平均误差约为1.31 dB,在30 GHz频段平均误差约为2.39 dB.该方法可实现Ka频段卫星通信系统的短时降雨趋势预测.%In order to accurately predict the short-term trend and intensity of rain attenuation in Ka-band satellite ground link,short-time rain attenuation prediction for Ka-band satellite communication system based on numerical weather prediction was introduced, and the prediction process was designed.Then one rainfall process in a region was studied by using the method mentioned above, and the measured values of rainfall attenuation and the forecast value of rainfall attenuation based on numerical forecast were compared and analyzed. The experimental results show that the error of rainfall attenuation is small between the forecast values and measured values, and their variation trend is in good agreement.This method can be used for short-term rainfall prediction of Ka-band satellite communication system.
展开▼
