Prediction of attenuation on satellite-Earth links for systems operating with low fade margins

Author

Watson, P.A. ; Hu, Y.F.

Author_Institution

Dept. of Electron., York Univ., UK

Volume

141

Issue

6

fYear

1994

fDate

12/1/1994 12:00:00 AM

Firstpage

467

Lastpage

472

Abstract

A new method for prediction of attenuation on satellite-Earth links is presented for systems operating with low fade margins. The method is based on modelling the physical structure of rainfall and includes, in order of importance: (1) an improved approach to combining components of fading; (ii) a non-uniform vertical on-average profile of rain specific-attenuation; (iii) the differing frequency dependencies of melting zone and rain components; and (iv) contributions from widespread and showery rain. The method has been tested using 21 years of data covering the 11-30 GHz range and shows good agreement. Finally, contour maps of link availabilities are presented for a hypothetical 20/30 GHz satellite at 6° West

Keywords

electromagnetic wave absorption; electromagnetic wave scattering; fading; microwave links; radiowave propagation; rain; satellite links; tropospheric electromagnetic wave propagation; 11 to 30 GHz; 20 GHz; 30 GHz; SHF; attenuation prediction; contour maps; frequency dependencies; link availabilities; low fade margins; melting zone; radiowave propagation; rain components; rain specific-attenuation; rainfall; satellite-Earth links; showery rain; widespread rain;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings

Publisher

iet

ISSN

1350-2417

Type

jour

DOI

10.1049/ip-map:19941428

Filename

340218