Physics
Scientific paper
Apr 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..15..143l&link_type=abstract
Advances in Space Research (ISSN 0273-1177), vol. 15, no. 4, p. (4)143-(4)157
Physics
4
Aeronomy, Dust Storms, Ions, Mars (Planet), Mars Atmosphere, Planetary Ionospheres, Planetary Magnetic Fields, Solar Wind, Atmospheric Density, Atmospheric Temperature, Ionospheric Temperature, Mariner 9 Space Probe, Soviet Spacecraft, Viking Lander Spacecraft
Scientific paper
Although the Phobos-2 spacecraft recently obtained important results relevant to some of the major remaining questions in Mars aeronomy, much remains to be done. In particular, not since the Viking Landers have we made in-situ measurements of aeronomical quantities such as atmospheric and ionospheric densities and temperatures below 400 km altitude. We have never made magnetic field measurements at these altitudes. Without such measurements we cannot unambiguously resolve arguments concerning issues such as the significance of the planetary magnetic field in the solar wind interaction, or understand the atmospheric cycle that leads to escape to space. With the trio of future orbiters including Mars Observer, Mars-94, and Planet-B we should see a veritable explosion of new knowledge, but some gaps in aeronomical science coverage will still remain. This paper briefly reviews some of the major unsolved problems in Mars aeronomy, and points out which are expected to remain outstanding after this flotilla of missions.
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