Relativistic electron enhancements - Simultaneous measurements from synchronous and low altitude satellites

Details Relativistic electron enhancements - Simultaneous measurements from synchronous and low altitude satellites Relativistic electron enhancements - Simultaneous measurements from synchronous and low altitude satellites

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18..397i&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, March 1991, p. 397-400. Research supported by Lockheed Independent Resea

Computer Science

Sound

15

Electron Precipitation, Relativistic Electron Beams, Satellite Sounding, Synchronous Satellites, Electron Energy, Energy Spectra, Low Altitude

Scientific paper

This paper presents, for the first time, simultaneous measurements of trapped relativistic electron enhancements at synchronous altitude and precipitating electrons in the bounce loss cone at low altitudes. The measurements show that the daily variations in the precipitation flux for L greater than 5 correlated well with the daily variations in the total flux at high altitude, both with respect to sudden enhancements as well as flux depletions. The daily averaged precipitating flux (E greater than 1 MeV) at L = 6.1 to 7.1 was about 0.3 percent of the daily averaged directional flux (E not less than 1.5 MeV) observed at synchronous altitude, whereas within narrow spikes the precipitating directional fluxes were often within a factor of 10 of the daily averaged trapped fluxes. Strong depletions in the synchronous altitude not less than 1.5 MeV electron intensities are shown to be associated with low-altitude measurements of the equatorward movement of precipitating spikes to lower L shells.

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