The coherency between precipitated and trapped energetic electrons at high latitudes

Details The coherency between precipitated and trapped energetic electrons at high latitudes The coherency between precipitated and trapped energetic electrons at high latitudes

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jatp...38..637a&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 38, June 1976, p. 637-645.

Physics

Electron Precipitation, High Energy Electrons, Magnetically Trapped Particles, Polar Regions, Satellite Observation, Atmospheric Models, Atmospheric Turbulence, Cyclotron Resonance, Esro 1 Satellite, Magnetohydrodynamic Stability, Whistlers

Scientific paper

Both the correlation and coherency between the count rates of precipitated and trapped energetic (greater than 40 keV) electrons, as observed by a particle experiment aboard the ESRO 1A satellite at northern high latitudes at 07 plus or minus 2 hr local time during March 1969, have been computed. The coherency estimates give a measure of the correlation between the fluctuations of the two count rates as a function of frequency. Highly coherent fluctuations, with periods of between 1 and 4 sec, were observed during the study of 'splash' precipitation events. Nearly simultaneous recordings of VLF chorus at South Uist, Scotland (L = 3.4) show similar and other periodicities. These results are discussed in terms of O'Brien's 'splash-catcher' model and the Kennel-Petschek theory of whistler-mode turbulence associated with a gyroresonance plasma instability.

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