Local time dependence of electron flux changes during substorms derived from multi-satellite observation at synchronous orbit

Details Local time dependence of electron flux changes during substorms derived from multi-satellite observation at synchronous orbit Local time dependence of electron flux changes during substorms derived from multi-satellite observation at synchronous orbit

May 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.3456n&link_type=abstract

Journal of Geophysical Research, vol. 87, May 1, 1982, p. 3456-3468.

Computer Science

Sound

19

Electron Density Profiles, Energetic Particles, Magnetospheric Electron Density, Satellite Sounding, Flux (Rate), Goes Satellites, Magnetic Signatures, Magnetic Variations, Time Dependence

Scientific paper

The local time dependence of variations in the flux of energetic electrons (energy greater than 2 MeV) in the near-earth magnetosphere during a substorm is investigated. Flux measurements were made by the space environment monitors on board the synchronous meteorological satellites GOES 2, GOES 3 and GMS, covering a range of approximately 10 hours local time. During substorm events indicated by low-latitude positive bay aspects in ground-based magnetic data, the simultaneous satellite observations demonstrate a local time dependence in particle dynamics. The onset of the expansion phase of a magnetospheric substorm is characterized by a flux increase in a wide longitudinal area of the nightside which follows a flux decrease extending from the afternoonside through midnight to the dawnside associated with an increase in magnetic field intensity. On the afternoonside, the substorm signature is a small flux decrease during the expansion phase associated with a decrease in magnetic field intensity, suggesting different mechanisms for the flux decreases in the afternoon and nighttime sectors.

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