Multi-satellite scintillations, spread-F and sporadic-E over Brisbane - 2

Hajkowicz L.A. (1978) Multi-satellite scintillations, spread-F and sporadic-E over Brisbane - 2. Journal of Atmospheric and Terrestrial Physics, 40 1: 99-104. doi:10.1016/0021-9169(78)90113-7


Author Hajkowicz L.A.
Title Multi-satellite scintillations, spread-F and sporadic-E over Brisbane - 2
Journal name Journal of Atmospheric and Terrestrial Physics
ISSN 0021-9169
Publication date 1978
Sub-type Article (original research)
DOI 10.1016/0021-9169(78)90113-7
Volume 40
Issue 1
Start page 99
End page 104
Total pages 6
Subject 1902 Film, Television and Digital Media
1908 Geophysics
Abstract Amplitude scintillations of radio transmissions from six U.S. Navy Navigational Satellites at a frequency of 150 MHz have been recorded at a southern mid-latitude station over a number of years. Scintillations were most pronounced in winter daytime and summer night-time. The winter maximum coincided with maxima of range spread (Se) and critical reflection frequency (foEs) of sporadic-E (Es) and range spread of spread-F (Sr) was negligible or absent. The summer scintillation maximum was associated with simultaneous maxima of nocturnal Se, Sr and high values of foEs. The well-known occurrence of intense Es in summer daytime, characterised by the diurnal maxima of Se and foEs, coincided with small scintillation activity. This appears to be due to the fact that the Es which occurs at this time is of the "sequential" type (Ess) the structure of which is too uniform to cause scintillations. On the other hand, the summer night-time and winter daytime maxima in scintillation activity coincided with the occurrence of so-called "constant height" Es (Esc) which is believed to have a small scale irregular structure. It is evident that Esc is responsible for daytime scintillations even in the UHF range of satellite transmissions.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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