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A study of C band equatorial scintillation in the Asian sector
Author(s) -
Mollen T. A.,
Liu C. H.,
Fang D. J.
Publication year - 1988
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/rs023i003p00337
Subject(s) - scintillation , decibel , interplanetary scintillation , fade , ionosphere , statistics , mathematics , physics , meteorology , remote sensing , geology , optics , geophysics , acoustics , solar wind , coronal mass ejection , quantum mechanics , detector , magnetic field
Ionosphere scintillation data at 4 GHz received in Hong Kong are used to study the statistics of scintillating signals. The data were taken during the last solar maximum (1979–1980) and covered two ionospheric locations, POR (123°E, 20°N) and IOR (108°E, 20°N). The study includes two parts. First, the cumulative distribution functions of the signal are generated from the data base and compared with theoretical distributions. Signal statistics such as the decibel levels of maximum peak, 5% peak, 95% fade and maximum fade are recorded and compared to the scintillation index S 4 . Empirical relations between S 4 and these decibel levels are obtained through statistical analysis. It will be shown that simple linear relations exist between S 4 and peak/fade decibel levels. These relations were compared with the results obtained from the “third peak” method for determining the S I index. The second part of the study involved a statistical investigation of the variations of the decorrelation interval of the signal and the roll‐off slope of the power spectrum. Diurnal and seasonal variations are investigated. Geophysical interpretation of the results are presented.