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Shapes of irregularities in the sporadic E layer producing quasi‐periodic scintillations
Author(s) -
Maruyama Takashi
Publication year - 1995
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/95rs00830
Subject(s) - geostationary orbit , middle latitudes , sporadic e propagation , physics , ionosphere , field strength , field (mathematics) , computational physics , geophysics , perpendicular , electron , quasi periodic , geology , optics , satellite , magnetic field , meteorology , geometry , mathematics , astrophysics , astronomy , quantum mechanics , pure mathematics
Field strengths of the beacon radio waves transmitted from the geostationary satellite ETS 2 are observed at a midlatitude station in Japan. Regular periodic variations in the field strength with a deep fade‐out at the central portion, called quasi‐periodic scintillations, are analyzed in terms of the minimum and maximum field strengths during each event. The variation in the field strengths is simulated with irregularity models for a variety of shapes, sizes, and electron densities. The numerical results are quantitatively compared with the observations and suggest that one type of quasi‐periodic scintillations is generated by linear irregularities that are elongated perpendicular to the drift direction, while the other type is generated by two‐dimensional, disk‐shaped irregularities.