DE-1 and COSMOS 1809 observations of lower hybrid waves excited by VLF whistler mode waves

Details DE-1 and COSMOS 1809 observations of lower hybrid waves excited by VLF whistler mode waves DE-1 and COSMOS 1809 observations of lower hybrid waves excited by VLF whistler mode waves

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21..653b&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 8, p. 653-656

Computer Science

Sound

7

Atmospheric Sounding, Earth Ionosphere, Ionospheric Ion Density, Ionospheric Propagation, Plasma Heating, Plasma Waves, Power Spectra, Very Low Frequencies, Whistlers, Electric Fields, Protons, Resonant Frequencies, Satellite Sounding, Scientific Satellites, Spectrograms, Thunderstorms

Scientific paper

Past work demostrates that strong lower hybrid (LH) waves can be excited by electromagnetic whistler mode waves throughout large regions of the topside ionosphere and magnetosphere. The effects of the excited LH waves upon the suprathermal ion population in the topside ionosphere and magnetosphere depend upon the distribution of LH wave amplitude with wavelength lambda. The present work reports plasma wave data from the DE-1 and COSMOS 1809 spacecraft which suggests that the excited LH wave spectrum has components for which lambda less than or equal to 3.5 m when excitation occurs at a frequency roughly equal to the local lower hybrid resonance frequency. This wavelength limit is a factor of approximately 3 below that reported in past work and suggests that the excited LH waves can interact with suprathermal H(+) ions with energy less than or equal to 6 eV. This finding supports recent work concerning the heating of suprathermal ions above thunderstorm cells.

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