Accession Number : AD0673878

Title :   OBSERVATIONS OF ENERGETIC ELECTRONS AT SYNCHRONOUS ALTITUDE. VOLUME I. GENERAL FEATURES AND DIURNAL VARIATIONS,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Paulikas,George A. ; Blake,J. Bernard ; Freden,Stanley C. ; Imamoto,Sam S.

Report Date : MAY 1968

Pagination or Media Count : 40

Abstract : Energetic electron fluxes above four integral thresholds (E sub e greater than 300 keV, greater than 450 keV, 1.05 MeV, and 1.9 MeV) were measured at synchronous altitude (R = 6.6 R sub e) during the first half of 1967 on board the ATS-1 satellite (1966-110A). The fluxes show a diurnal variation, with the noon-to-midnight ratio being larger for the more energetic electron groups and being larger, on the average, for magnetically disturbed days. Magnetic storms produce a great deal of fine structure in the electron fluxes, with changes occurring on the time scale of minutes; the effect of such storms is to depress the fluxes. Recovery to pre-storm levels is an energy-dependent process which proceeds more slowly for more energetic electrons and apparently in a stepwise manner. (Author)

Descriptors :   (*MAGNETIC STORMS, ELECTRON DENSITY), ENERGY, DIURNAL VARIATIONS, ALTITUDE, SYNCHRONOUS SATELLITES, PROTONS, MAGNETOSPHERE, DETECTORS, PARTICLES, INTERACTIONS, SCIENTIFIC SATELLITES

Subject Categories : Atmospheric Physics
      Geomagnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE