Giotto's mission to planet earth

Details Giotto's mission to planet earth Giotto's mission to planet earth

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1663g&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, Sept. 1991, p. 1663-1666.

Physics

8

Geomagnetism, Giotto Mission, Spacecraft Trajectories, Swingby Technique, Bow Waves, Magnetopause

Scientific paper

The Giotto spacecraft was reactivated in February 1990 and performed the first-ever earth gravity-assisted maneuver on July 2, 1990 to be retargeted for Comet P/Grigg-Skjellerup. This swing-by is of unique scientific interest due to Giotto's hyperbolic, high-inclination orbit. This paper reports on scientific results of the Giotto magnetic field experiment. Due to the high fly-by velocity and the relative quietness of the magnetosphere during the swing-by period, these measurements present a snapshot view of the earth magnetosphere with clearly identified inbound and outbound bow shock and magnetopause crossings. The outbound crossings are of particular interest as surface waves at the polar magnetopause at a distance of 28 earth radii as well as a strong quasi-perpendicular bow shock at a distance of about 64 earth radii are observed.

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