Eastern part of Landsat WRS-2 192/39, just outside of west edge of 191/39. Used by CNES (100 x 100 km), but a smaller area would be better.
Google Earth: Ranges from a dune wave pattern toward the northwest, to a criss-crossing dune pattern in general, to a pockmarked appearance toward the southeast. Reasonably spatially homogeneous in its heterogeneity when averaging over areas of 75 km by 75 km. A darker than average site.