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

Journal Article · Fri Mar 01 04:00:00 EST 1991 · Geophysical Research Letters (American Geophysical Union); (United States)

DOI:https://doi.org/10.1029/91GL00132· OSTI ID:5877070

Imhof, W L; Voss, H D; Mobilia, J; Datlowe, D W; McGlennon, J P ^[1]; Baker, D N ^[2]

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1. Lockheed Palo Alto Research Lab., CA (United States)
2. Goddard Space Flight Center, Greenbelt, MD (United States)

The authors present here 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 > 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 > 1 MeV) at L = 6.1 to 7.1 was about 0.3 percent of the daily averaged directional flux (E {ge} 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 {ge} 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.

• OSTI ID: 5877070
• Journal Information: Geophysical Research Letters (American Geophysical Union); (United States), Journal Name: Geophysical Research Letters (American Geophysical Union); (United States) Vol. 18:3; ISSN 0094-8276; ISSN GPRLA
• Country of Publication: United States
• Language: English

Related Subjects

661320* -- Auroral
Ionospheric
& Magnetospheric Phenomena-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHARGED-PARTICLE PRECIPITATION
CORRELATIONS
DAILY VARIATIONS
DATA ANALYSIS
ELECTRON DENSITY
ELECTRON PRECIPITATION
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY SPECTRA
FERMIONS
LEPTONS
LEVELS
LOSS CONE
RELATIVISTIC RANGE
SPECTRA
TRAPPED ELECTRONS
VARIATIONS