On the frequency dependence of ELF/VLF waves produced by modulated ionospheric heating

Journal Article · Thu Jun 01 00:00:00 EDT 1989 · Radio Science; (USA)

DOI:https://doi.org/10.1029/RS024i003p00270· OSTI ID:5594129

Rietveld, M T; Stubbe, P; Kopka, H ^[1]

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1. Max-Planck-Institut fuer Aeronomie, Katlenburg-Lindau (Germany, F.R.)

Results for local field strength and apparent source height as a function of frequency from 200-6600 Hz were obtained for ELF/VLF waves produced in the auroral D region through modulated RF heating. Besides the normal amplitude peaks near 2, 4, and 6 kHz, the occasional presence of peaks is noted at intermediate frequencies, particularly in the right-hand circularly polarized mode. A model involving a full-wave solution of the ELF/VLF waves produced by the self-consistently calculated source currents, and corrected for the effects of finite source current extent and multiple earth-ionosphere reflections, is shown to accurately reproduce the measured amplitudes and source heights about 600 Hz, but to increasingly underestimate the measured amplitudes below this value. 15 refs.

• OSTI ID: 5594129
• Journal Information: Radio Science; (USA), Vol. 24; ISSN 0048-6604
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
IONOSPHERE
RADIOWAVE RADIATION
AURORAL ZONES
D REGION
FREQUENCY MODULATION
HEATING
SPORADIC E
WAVE PROPAGATION
E REGION
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
MODULATION
PLANETARY IONOSPHERES
RADIATIONS
640201* - Atmospheric Physics- Auroral
Ionospheric
& Magetospheric Phenomena