Morphological and ionospheric aspects of quasiperiodic scintillations

Hajkowicz L.A. (1977) Morphological and ionospheric aspects of quasiperiodic scintillations. Journal of Atmospheric and Terrestrial Physics, 39 7: . doi:10.1016/0021-9169(77)90146-5


Author Hajkowicz L.A.
Title Morphological and ionospheric aspects of quasiperiodic scintillations
Journal name Journal of Atmospheric and Terrestrial Physics
ISSN 0021-9169
Publication date 1977
Sub-type Article (original research)
DOI 10.1016/0021-9169(77)90146-5
Volume 39
Issue 7
Total pages 1
Subject 1902 Film, Television and Digital Media
1908 Geophysics
Abstract Mult́i-satellite scintillations, at a transmission frequency of 150 MHz, and associated vertical-incidence ionosonde data were recorded at Brisbane from November 1973-January 1976. A distinct type of regular amplitude fadings, so-called quasiperiodic (QP) scintillations, was most frequently recorded in a time interval: 2200 to 0200 LT in the southern summer, and to a lesser extent in autumn. The maximum in the occurrence number of QP scintillations coincided with the largest simultaneous increases in the intensities of nocturnal sporadic-E (Es) and spread-F. QP scintillations were rarely recorded in winter at the time of pronounced Es activity. The majority of QP scintillations occurred at zenith angles in excess of 70°, and at north-west azimuth angles centered on 330°. The azimuth preference in the occurrence of QP scintillations is similar to the prevailing north-west direction of arrival of ionospheric reflections at Brisbane. It appears that the generation of these scintillations is associated with the frontal structure of irregularities responsible for spread-F and Es in southern midlatitudes.
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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