VLF heating of the lower ionosphere

Details VLF heating of the lower ionosphere VLF heating of the lower ionosphere

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..729i&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, May 1990, p. 729-732.

Physics

38

Ionospheric Heating, Lower Ionosphere, Radio Frequency Heating, Electric Fields, Ionospheric Cross Modulation, Lightning, Radio Transmitters, Very Low Frequencies, Whistlers

Scientific paper

A controlled wave-injection experiment with a 28.5 kHz transmitter having a radiated power of 100 kW has revealed evidence of ionospheric heating by VLF waves. Calculations indicate that the observed effect can be attributed to the absorption of wave energy in the lower ionosphere, which is estimated to result in a 30 percent enhancement in the collision frequency at 85 km. This process also represents a new means of direct coupling of lightning energy to the lower ionosphere.

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