Physics
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..gp22a02a&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #GP22A-02 INVITED
Physics
1594 Instruments And Techniques
Scientific paper
The Mars Global Surveyor Mission was designed to replace the ill fated Mars Observer Mission which failed to achieve orbit around Mars in 1993. Due to resource limitations the mission was designed to use aerobraking as a primary strategy to circularize its orbit by dragging the spacecraft solar panels against the planet's atmosphere. This orbit geometry was highly favorable to the magnetic mapping objectives of MGS since it brought the spacecraft to less than 100km above the surface of Mars during peripasis. The highly elliptical orbits associated with aerobraking resulted in non-ideal coverage of the planet but were instrumental in the discovery of intensely magnetized regions of the Martian crust and the determination that the Martian dynamo had ceased to exist very early in the history of the planet. Crustal magnetism at Mars exceeds by an order of magnitude that observed at Earth and has significant implications for our knowledge of the planet's thermal evolution, its interaction with the solar wind, and the possible role of the magnetic field in the loss of volatiles from the atmosphere.This talk will present details of the MGS mission, its orbits, the unique accommodation of the magnetic field instruments and highlights of the scientific results achieved to date.
Acuña Mario Humberto
Connerney J. E.
Lin Robert P.
Mitchell Dana D.
Ness Norman F.
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