WashingtonPost.com suggests ice and rock will be distinguishable by Mars Express, but...
I'm concerned about the potential for "false negatives" and the adverse impact they could have on fervor for Mars exploration. WashingtonPost.com suggests that ice and rock will be distinguishable by Mars Express, but again I see few (if any) details:
http://www.washingtonpost.com/wp-dyn/articles/A30844-2003Dec25.html
"Mars Express can even probe beneath the surface of the planet using long wavelength radio waves from a 130-foot antenna to search for signs of subsurface water or ice."
