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

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)

Document Details

Document Type
Technical Report
Publication Date
May 01, 1968
Accession Number
AD0673878

Entities

People

  • Bernard Blake
  • George A. Paulikas
  • Sam S. Imamoto
  • Stanley C. Freden

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Altitude
  • Artificial Satellites
  • Diurnal Variations
  • Electron Flux
  • Electrons
  • Integrals
  • Magnetic Storms
  • Observation
  • Recovery

Fields of Study

  • Physics

Readers

  • Atmospheric Science/Meteorology
  • Mathematics or Statistics
  • Solar Physics

Technology Areas

  • Microelectronics
  • Space