Computer Science
Scientific paper
Feb 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esabu..37...46w&link_type=abstract
ESA Bulletin (ISSN 0376-4265), no. 37, Feb. 1984, p. 46-50.
Computer Science
Geomagnetic Tail, International Sun Earth Explorer 3, Space Exploration, Comets, Earth Orbits, Energetic Particles, Magnetic Fields, Magnetohydrodynamic Flow, Spatial Distribution
Scientific paper
The ISEE-3 mission is reviewed, with a focus on its exploration of the geomagnetic tail (GT) in 1982 and 1983. The complex orbital maneuvers, including lunar swing-bys to offset precession, used to bring ISEE-3 from its 1978-1982 sunward position and let it cross the GT at various distances are explained and illustrated. The structure of the GT is shown in a diagram, and preliminary results from the ISEE-3 measurements are summarized. The GT beyond about 120 earth radii (Re) has a diameter about 60 Re, two distinct lobes of strength 9 nT, a separating neutral sheet embedded in a plasma sheet, increased turbulence beyond about 180 Re, and plasma and energetic-ion flows away from the earth at up to 500 km/sec from an acceleration region 60-100 Re from the earth. ISEE-3 has now left the earth vicinity to pass through the tail of the comet Giacobini-Zinner in September, 1985, and to monitor solar-wind conditions upstream of comet Halley in March, 1986.
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