Statistics of effective rain height by using zenith looking radiometer at 29 GHZ at Amritsar ( INDIA)

The satellite propagation systems are affected by the presence of precipitation in the path of propagation to a great extent Thus, for the optimum performance of a communication link, the system designer needs to have the knowledge about the slant path attenuation prediction for which effective rain height is an important parameter. Here we present the results of the Effective rain height in statistical form for year 2004¿2005. The results are derived from zenith path attenuation data along with corresponding rain rate data, derived from zenith looking radiometer and tipping bucket rain guage, respectively. It is observed that the effective rain height is found to decrease with increase in rain rate. Again the average effective rain height Is estimated to be as 6.41 Kms while ITU-R predicts it to be as 4.78 Kms. Therefore ITU-R slightly overestimates the rain height. Thus this difference should be taken into account while calculation of slant path attenuation.