Rain attenuation plays a significant role in satellite communications in the Ka band. The paper studied the rain attenuation using empirical formulations of the prominent models like ITU-R P.618-13, ITU-R P.838-3, Moupfouma, and Garcia Lopez. At a rain rate of 47.6 mm/hr, measured by Indian Meteorological Department for 2018 for Gadanki, near Tirupati, India, the attenuation values were calculated. The measured data, acquired by Ka band digital beacon receiver, is compared with the calculated data at the frequency of 20.2 GHz for both horizontal and vertical polarizations. The value of parameters viz. relative error, root-mean-square error, standard deviation error, and Chi-square error were calculated. Frequency scaling for the frequency of 30.5 GHz was calculated with the help of ITU-R P.618-13 method.

降雨衰减在Ka波段的卫星通信中起着重要作用。该论文使用诸如ITU-R P.618-13，ITU-R P.838-3，Moupfouma和Garcia Lopez等著名模型的经验公式研究了降雨衰减。由印度气象局在2018年针对印度蒂鲁伯蒂附近的加丹基（Gadanki）测得的降雨率为47.6毫米/小时，计算了衰减值。将Ka频段数字信标接收机获取的测量数据与水平极化和垂直极化在20.2 GHz频率下的计算数据进行比较。参数的值。计算了相对误差，均方根误差，标准偏差和卡方误差。借助ITU-R P.618-13方法计算了30.5 GHz频率的频率定标。