Abstract: 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.

Key words: numericalweatherprediction, Ka-band, rainattenuation, short-termprediction, satellitecommunication