Effect of Atmospheric Parameters on Satellite Link

Abstract

The rainfall path attenuation measured at Universiti Sains Malaysia (USM) for 4 years (January 02 to January 06) is presented. The data obtained are useful to investigate the impairment due to rainfall attenuation in satellite links operating in tropical and equatorial climates. It shows that the logarithmic function with ground rain rate deviates at very high rain rate. A rainfall rate of 130 mm/h causes the rainfall attenuation threshold (> 20 dB) to be exceeded. Maximum exceedences for rain rate and attenuation were observed during the wet months. The cumulative distributions of attenuation derived from the measured data are presented and compared with those obtained with existing prediction methods.

Analysis of Selected Earth-Space Rain Attenuation Models for a Tropical Station

“…The results of data analysis carried out and reported by [7] suggests that the average fade duration is inversely proportional to the fade depth, contrary to previous reported studies undertaken by Qing and Allnutt [8]. Rainfall type for tropical and sub-tropical regions had been classified as stratiform, convective, monsoon precipitation and tropical storm [9].…”

“…This is because strong storms push rain higher into the atmosphere, and thereby lengthening the slant path [9].…”

Obtaining Raindrop Size Model Using Method of Moment and Its Applications for South Africa Radio Systems

“…The details of data sorting is described in reference [13]. Several authors have employed rain rate for the classification of raindrop size distribution into their respective rain types such as drizzle, widespread, shower and thunderstorm [20,[26][27][28][29][30][31]. As presented by Afullo [29], raindrop size is classified into the four classes based on the characteristic of unimodal and bimodal effects on the probability density of the drop size distribution in South Africa.…”

Cloud Attenuation in Millimeter Wave and Microwave Frequencies for Satellite Applications over Equatorial Climate

“…Data from the Meteorological Department, corresponding to the Penang station (4.6 km away from the University), are also available and can be used to detect malfunctions in the station. Detail of the measurement setup is described in [4].…”