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VLF reflection properties of the normal and disturbed polar ionosphere in northern Greenland
Author(s) -
Kossey P. A.,
Turtle J. P.,
Pagliarulo R. P.,
Klemetti W. I.,
Rasmussen J. E.
Publication year - 1983
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/rs018i006p00907
Subject(s) - ionosphere , quiet , reflection (computer programming) , daytime , atmospheric sciences , polar , latitude , flux (metallurgy) , geology , ionospheric reflection , geophysics , physics , geodesy , ionospheric absorption , astronomy , materials science , computer science , programming language , metallurgy
This paper describes long‐wave reflection properties of the high‐latitude ionosphere, observed under both quiet and highly disturbed conditions. The data were obtained using a short‐pulse VLF ionosounder located within the polar cap, in northern Greenland. Under quiet ionospheric conditions, substantial diurnal, day‐to‐day, seasonal, and solar cycle variations were observed. During polar cap absorption events the VLF reflection properties of the disturbed ionosphere depended greatly on the solar illumination conditions, as well as the magnitude of the incoming energetic particle flux. The use of the steep‐incidence VLF reflection data to develop and validate models of the lower ionosphere is discussed; and electron density profiles are given, derived from reflection data obtained during quiet and disturbed conditions.