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Worldwide mapping of VLF intensities generated by a ground transmitter
Author(s) -
Souza R. F.,
Scarabucci R. R.
Publication year - 1977
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/rs012i003p00441
Subject(s) - ionosphere , wkb approximation , attenuation , transmitter , physics , computational physics , radio wave , altitude (triangle) , d region , electron precipitation , magnetic field , intensity (physics) , satellite , geophysics , optics , magnetosphere , telecommunications , channel (broadcasting) , computer science , geometry , mathematics , quantum mechanics , astronomy
The prediction of the magnetic field intensity of VLF waves in the upper ionosphere generated by a ground transmitter is investigated using a latitudinally dependent model of the ionosphere that includes only electrons as charged particles. The behavior of the wave in the lower ionosphere is analyzed using a full‐wave computer program developed by Scarabucci. The attenuation in the neutral atmosphere leaky waveguide is found using the results of that program. Above the E region the WKB approximation is used to find the ray trajectories. Based on these assumptions, a mapping of the wave magnetic field intensity at an altitude of 500 km for a night transmission of the NAA station is found. The theoretical predictions are compared with some data obtained from the OGO‐4 satellite.