Other
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..773l&link_type=abstract
Lunar and Planetary Science, volume 27, page 773
Other
Cassini, Cassini: Information, Coverage, Mapping, Psychology
Scientific paper
I investigate, by means of numerical experiments and a real-time quiz of colleagues (to be repeated at the poster presentation associated with this abstract), how well-characterized a planet may be considered, as a function of how much of its surface has been studied. Most measures seem to indicate that characterization quality increases steeply up to about 30% coverage. Beyond 30%, additional coverage has a lower marginal value as a 'complete' knowledge of the surface is asymptotically reached. These studies are pertinent where tradeoffs of coverage against other scientific objectives exist, for example the orbital tour design of the Cassini mission. The tour design affects how much of Titan's surface (after the Galileo mission, Titan's surface becomes the largest mappable, but unmapped, area in the solar system) may be covered by the Cassini radar. The mission has too few flybys to cover all of Titan's surface: the Radar team aims to have 30% coverage at 1km resolution or better. I also find that long, thin swaths sample a planet better than square blocks of equivalent area.
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