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Land-mobile-satellite fade measurements in AustraliaAttenuation measurements were implemented at L-band (1.5 GHz) in southeastern Australia during an 11-day period in October 1988 as part of a continuing examination of the propagation effects due to roadside trees and terrain for mobile-satellite service. Beacon transmissions from the geostationary ETS-V and IPORS satellites were observed. The Australian campaign expanded to another continent our Mobile Satellite Service data base of measurements executed in the eastern and southwestern United States regions. An empirical fade distribution model based on U.S. data predicted the Australian results with errors generally less than 1 dB in the 1-20 percent probability region. Directive antennas are shown to suffer deeper fades under severe shadowing conditions (3 dB excess at 4 percent), the equal-probability isolation between co- and cross-polarized transmissions deteriorated to 10 dB at the 5 dB fade level, and antenna diversity reception may reduce unavailability of the system by a factor of 2-8.
Document ID
19920042042
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Vogel, Wolfhard J.
(Texas, University Austin, United States)
Goldhirsh, Julius
(Johns Hopkins University Laurel, MD, United States)
Hase, Yoshihiro
(MITI, Communications Research Center Tokyo, Japan)
Date Acquired
August 15, 2013
Publication Date
February 1, 1992
Publication Information
Publication: Journal of Spacecraft and Rockets
Volume: 29
ISSN: 0022-4650
Subject Category
Communications And Radar
Accession Number
92A24666
Funding Number(s)
CONTRACT_GRANT: JPL-956520
CONTRACT_GRANT: N00039-89-C-5301
Distribution Limits
Public
Copyright
Other

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