On the Cumulative Distribution of Fadings of UHF-VHF Waves Observed at Ootacamund on a Satellite-Earth Communication Channel

Abstract

Cumulative distributions of fadings of radio waves due to irregular structure of the ionosphere have been evaluaed with the aim of evolving an economical method of predicting distributions likely to be experienced over long periods. While seasonal and diurnal effects have been observed, the long-term average distributions have been seen to depend only on frequency of transmission and the long-term average value of scintillation index. Based on these results, a procedure has been suggested for estimating the cumulatile distribution of fadings of scintillation index, with possible application to link-reliability estimation. These results will be of use for the communication system design.

Indexing Terms:

• VHF-UHF Scintillations
• Ionospheric Scintillation
• Failing-Satellite Forth Paths

Additional information

Notes on contributors

A.I. Trivedi

Trivedi, A I: Graduated from IIT, Bombay in Electrical Engineering. Completed the M. Phil and Dip. in Communication (DIC) from University of London (U.K.) and Imperial College, London (U.K.) respectively. Was a Pcol Officer at Physical Research Laboratory, Ahmedabad from 1977–78. Currently, Lecturer in Electrical Engineering at M.S. University, Baroda.