Estimation of rain induced attenuation on earth- space path

This paper describes research on earth-space attenuation on a microwave communications link set up at Belgaum-RC Nagar (Karnataka State), India, during July to September, each year. The rain data secured from India Meteorological Department, Bangalore has been used for analysis with the live data of rainfall recorded with the aid of two tipping bucket rain gauges, and a disdrometer. A simple model of interpretation of attenuation has been utilized with simple formulae to suit the purpose. The results of this experimentation are in agreement with the disdrometer observations and the data collected through experiment tallies with the Micro Rain Radar (MRR) Recorded data secured from the ISRO-operated-MRR rainfall data. The model used in the experimentation, it is hoped, would enable further research in to the aspects attenuation of microwave signals in different Tropical stations.