Magnetopause characteristics at 0840-1040 hours local time

Details Magnetopause characteristics at 0840-1040 hours local time Magnetopause characteristics at 0840-1040 hours local time

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.3387w&link_type=abstract

Journal of Geophysical Research, vol. 85, July 1, 1980, p. 3387-3395.

Physics

4

Distribution Functions, Energetic Particles, International Sun Earth Explorer 1, Magnetopause, Magnetically Trapped Particles, Magnetosheath, Particle Motion, Periodic Variations, Radial Velocity, Satellite Orbits, Time Dependence

Scientific paper

An analysis of three-dimensional energetic particle distributions for 14 consecutive ISEE satellite orbits during magnetopause crossings and close approaches is presented. The data were collected from the Nov. 10 through Dec. 11, 1977, time period and cover local times of 0840 to 1040 hours. It was found that the magnetopause in this period defined by energetic particles can be represented as sharp particles and a well defined boundary for magnetospherically trapped particles for a wide range of magnetospheric activity and magnetosheath field conditions. The magnetopause position, orientation, and velocity were determined for all identified magnetopause crossings and close approaches using the technique of Williams (1979); it was found that the magnetopause is nearly always in motion with velocities ranging from near zero to at least plus or minus 25 km/s. Correlations with published plasma, magnetic field, and plasma wave magnetopause identifications show the energetic particle results to be accurate and an important factor in determining magnetopause characteristics and behavior.

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