Wave-induced burst precipitation events detected with a digital ionosonde

Details Wave-induced burst precipitation events detected with a digital ionosonde Wave-induced burst precipitation events detected with a digital ionosonde

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17...61j&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, Jan. 1990, p. 61-64.

Physics

4

Electron Precipitation, Ionosondes, Magnetosphere-Ionosphere Coupling, Very Low Frequencies, Critical Frequencies, Cyclotron Radiation, Ionospheric Propagation, Refractivity

Scientific paper

Initial results are presented from two methods whereby burst precipitation events in the lower ionosphere, almost certainly induced by VLF wave-particle interactions in the magnetosphere, have been detected using a ground-based digital ionosonde. In the first method, HF echoes are received above the critical frequency of the surrounding plasma; particle energies and the location and extent of the plasma enhancement may be deduced. In the second method, a rapid decrease in the phase of ionospheric echoes is observed due to refractive index changes along the echo path; particle energies, the duration of the precipitation event and the precipitation energy flux can be estimated.

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