re: Could We Make A "Solar Still" On Mars?
We might already be seeing an example of this. See the MI images here:
Erebus Outcrops.
http://www.markcarey.com/cgi-bin/mt/mt-view.cgi/18/entry/27390/discussion_page?start=376&show=20
The flattened areas have a mushy appearance to them. Another check for this might be to perform a RAT observation early in the morning where there might be residual moisture left and compare this to a RAT observation of a spot nearby later in the afternoon when moisture would be expected to burn off.
Would there be a difference in the appearance in the two RATted areas?
Bob Clark