This daytime IR image from shows NASA 2001 Mars Odyssey spacecraft part of the dune field on the floor of Rabe Crater. The dunes show up as brighter than the surrounding materials because they are warmer.
Rabe Crater Dunes
This daytime IR image from shows NASA 2001 Mars Odyssey spacecraft part of the dune field on the floor of Rabe Crater. The dunes show up as brighter than the surrounding materials because they are warmer.