Types of ionospheric scintillations in southern mid-latitudes during the last sunspot maximum

Hajkowicz L.A. (1994) Types of ionospheric scintillations in southern mid-latitudes during the last sunspot maximum. Journal of Atmospheric and Terrestrial Physics, 56 3: 391-399. doi:10.1016/0021-9169(94)90220-8


Author Hajkowicz L.A.
Title Types of ionospheric scintillations in southern mid-latitudes during the last sunspot maximum
Journal name Journal of Atmospheric and Terrestrial Physics
ISSN 0021-9169
Publication date 1994-01-01
Sub-type Article (original research)
DOI 10.1016/0021-9169(94)90220-8
Volume 56
Issue 3
Start page 391
End page 399
Total pages 9
Subject 1902 Film, Television and Digital Media
1908 Geophysics
Abstract A 5-yr study (1987-1992) has been undertaken at a southern mid-latitude station, Brisbane (35.6°S invariant latitude) on scintillation occurrences in radio-satellite transmission (at a frequency of 150 MHz) from polar orbit Transit satellites, within a sub-ionospheric invariant latitude range 20-55°S. Over 7000 recorded passes were used to define the spatial and temporal occurrence pattern of different types of scintillation events. Two predominant scintillation types were found: so-called type P (associated with a scintillation patch close to the magnetic zenith) and type S (characteristic of the equatorward edge of auroral scintillation oval). Type S was by far the most frequent during sunspot maximum (1988-1992), with sharp occurrence peaks in the summer-autumn period. Its seasonal occurrence showed a high degree of correlation (correlation coefficient r = 0.8) with the seasonally averaged 10.7 cm solar radio flux. This type occurred mainly at night-time except in austral summer where 40% of scintillations were detected in daytime, coinciding with the well-known summer peak of sporadic-E occurrence. Type P was more predominant during a year (1987) of ascending sunspot activity but decreased to a much lower level during the sunspot maximum.
Q-Index Code C1
Institutional Status Unknown

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