Computer Science
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984p%26ss...32..809s&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 32, July 1984, p. 809-817. Research supported by the Department of Transport
Computer Science
7
Airglow, Auroral Echoes, Electromagnetic Pulses, Hiss, Radio Auroras, Vlf Emission Recorders, Cyclotron Resonance, Electron Precipitation, Equatorial Atmosphere, Ionospheric Electron Density, Luminous Intensity, Power Spectra, Television Systems
Scientific paper
The association between VLF hiss and auroral-light intensity has been studied for pulsating auroras by coordinated observations with a broad-band VLF receiver and a low-light-level TV system viewing the N2(+) ING emissions. Power-spectral analyses of the VLF hiss and auroral-light intensity fluctuations display a common peak at 1.3 + or - 0.3 Hz. Cross-spectral analysis shows that the times of the peaks in the auroral-light intensity fluctuations differ from those of the VLF hiss by times ranging between zero and 0.2 s. This result is shown to be compatible with a cyclotron-resonance interaction in the vicinity of the equatorial plane. The periodicity of the intensity fluctuations can be accounted for by assuming the process is driven by echoing VLF hiss, which may be single-phase or three-phase.
Duthie D. D.
Rash P. S. J.
Scourfield Malcolm J. W.
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