Accession Number : AD0780174

Title :   UHF Fading from a Synchronous Satellite Observed at Kwajalein October 1970 through June 1972.

Descriptive Note : Technical note,

Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s) : Nichols,Burt E.

Report Date : 22 MAR 1974

Pagination or Media Count : 29

Abstract : A receiving system was installed on Kwajalein for the purpose of continuously recording the received signal level from the TACSAT beacon at 254.1 MHz in order to help determine the statistics of amplitude fading or scintillation from UHF satellites at near-equatorial latitudes. This note summarizes data recorded from October 28, 1970 through June 20, 1972. Significant periods of fading were observed. Essentially all of the fading occurred between 8:00 pm and 6:00 am local time. Very little fading (less than 4% of the time) occurred during the winter (November to March) and significant fading (over 10% of the time) occurred during the spring and summer (April to August). Fading usually was as much as 10 dB and 20 dB below the average level with accompanying enhancements up to 6 dB. Fading rates usually were in the range of 1 to 3 seconds with occasional longer periods up to 10 seconds. (Author)

Descriptors :   *SATELLITE COMMUNICATIONS, *FADING(ELECTROMAGNETIC WAVES), ULTRAHIGH FREQUENCY, TACTICAL COMMUNICATIONS, COMMUNICATION SATELLITES, SYNCHRONOUS SATELLITES, KWAJALEIN ATOLL

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE