Physics
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....9813627s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A8, p. 13,627-13,634.
Physics
42
Electromagnetic Absorption, F Region, Gyrofrequency, Ionospheric Propagation, Radio Frequency Heating, Electron Energy, Harmonics, Wave-Particle Interactions
Scientific paper
Observations of the anomalous absorption of low-power HF probe waves caused by the action of a high-power HF ordinary mode radio wave are presented. At pump frequencies in the vicinity of harmonics of the electron gyrofrequency the anomalous absorption measured on the low-power probe waves exhibit local minima. Also at these frequencies, large-scale changes deduced from phase measurements of the low-power probe waves and heater self-absorption are reduced, whereas the growth time of the anomalous absorption is increased. The electron gyrofrequency estimated from the frequency of the absorption minimum compares favorably with that derived from the International Geomagnetic Reference Field (IGRF) magnetic field model.
Honary Farideh
Jones Bernard T.
Robinson Terry R.
Stocker A. J.
Stubbe Peter
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