SLANT-PATH FREQUENCY SCALING OF AMPLITUDE SCINTILLATIONS DURING CLEAR-SKY CONDITIONS AND RAIN

Scintillation measurements using the OLYMPUS satellite at 12.5, 19.8 a nd 29.7 GHz have been analyzed with particular regard to frequency sca ling. Scintillations have been separated from the slowly varying rain, cloud and gaseous attenuations by means of suitable filtering. Freque ncy scaling factors have been obtained for clear-sky and rain conditio ns. A comparison of the measured scaling factors with predictions from the current CCIR model reveals that the predicted data are underestim ated. After a slight modification of the model, the predictions agree well with the measurements.