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VLF propagation in the magnetosphere during sunrise and sunset hours
Author(s) -
Walter F.,
Scarabucci R. R.
Publication year - 1975
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/rs010i011p00965
Subject(s) - whistler , sunrise , sunset , magnetosphere , physics , plasmasphere , ionosphere , electron density , very low frequency , atmospheric sciences , geophysics , meteorology , electron , astronomy , plasma , quantum mechanics
Whistlers observed on records of the OGO‐4 satellite during the sunset/sunrise hours show evidence of both the proresonance (PR) and prolongitudinal (PL) mode of propagation. By tracingrays in a model magnetosphere suitable for these hours, the whistlers observed on these records are reproduced. The upper cutoff frequency presented in the walking trace whistlers appears naturally as a consequence of the inclusion of latitudinal gradients in the electron density model. A new whistler trace is predicted which appears as a consequence of the transition from the PR to the PL mode of propagation.