C is the area on the south edge of Valles Marineris over which SCIM would make a very low pass (c. 40 km) to collect some Mars atmosphere for return to Earth. D and E are sites for the Naiades landers - 2 or 4 landers which would land close to each other and use electromagnetic sounding to detect water below the surface. D is in the head of a large valley draining into Hellas. E, the final site, is a small crater with many gullies cut into its walls.
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This map is a grab-bag of sites for Mars Scout missions - just those for which we have some site information. A is the Urey site - Urey was a lander and rover (using the Mars 2001 lander and Marie Curie rover) to measure the age of very young lava flows. B is the area for Cryoscout, using the same Mrs 2001 lander to deploy a probe to melt its way down into polar ice, examining layers of ice and climate data.
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Mars Scout was a program like Discovery, intended to fly competed small missions fairly frequently. Mars was excluded from Discovery while Mars Scout was in operation. Two missions flew - Phoenix and MAVEN. Now Mars Scout is over and Mars is back in Discovery. But while it lasted there were lots of proposals. I will only look at those for which I have landing site details. The first is a Mars aircraft called ARES (Aerial Regional-scale Environmental Survey).
#mars #marsscout