Worldwide mapping of VLF intensities generated by a ground transmitter
Article first published online: 7 DEC 2012
Copyright 1977 by the American Geophysical Union.
Volume 12, Issue 3, pages 441–449, May-June 1977
How to Cite
1977), Worldwide mapping of VLF intensities generated by a ground transmitter, Radio Sci., 12(3), 441–449, doi:10.1029/RS012i003p00441., and (
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Received: 30 SEP 1974
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.