Accession Number : AD0489760

Title :   INITIAL OBSERVATIONS OF LOW-ENERGY ELECTRONS IN THE EARTH'S MAGNETOSPHERE WITH OGO 3.

Descriptive Note : Progress rept.,

Corporate Author : IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY

Personal Author(s) : Frank, L. A.

Report Date : AUG 1966

Pagination or Media Count : 48

Abstract : Initial observations of electrons over the energy range extending from approximately 100 eV to 50 KeV at geocentric radial distances 8 R sub E to 20 R sub E in the dark hemisphere of the earth's magnetosphere with electrostatic analyzers borne on OGO 3 (launch, 7 June 1966) are presented for the inbound pass of the satellite on 12-13 June 1966. The electron differential energy spectrums typically are characterized by a single peak in intensities occurring in the energy range approximately 0.8 to 10 KeV and at lower energies with increasing geocentric radial distances, by broader width with decreasing radial distance, and by greater slopes for electron energies E sub E greater than 5 keV with increasing radial distance. The radial profiles of unidirectional and omnidirectional, integral and differential intensities, and energy densities of electrons within the above energy range are characterized by catastrophic variations in magnitude which are presumably reflections of both temporal and spatial variations in intensities. A relatively uncommon example of an electron spectrum with two peaks in intensity at E sub E approximately 1 keV and approximately 10 keV is examined during the onset of the event and the peaks in electron intensity were found to occur at lower energies with increasing time.

Descriptors :   *ELECTRON DENSITY), (*UPPER ATMOSPHERE, (*SCIENTIFIC SATELLITES, ELECTRON DENSITY), VAN ALLEN RADIATION BELT, INTENSITY, AURORAE, ELECTRONS, ENERGY, EXPERIMENTAL DATA, ANALOG COMPUTERS.

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE