Mars Exploration Rover OPPORTUNITY
(January 25, 2004 - present) [2960 on May 22, 2012]

Rover Atmospheric Entry Profile (Density, pressure, temperature versus altitude)
Pancam-derived 440 nm and 880 nm Atmospheric opacity, sols 1-2790 (at GEO Node)
Mini-TES derived near-surface atmosphere temperature profiles (is this derived product available?.. mini-TES data are at GEO)
Dust devil images, animations (is there a data set available which indicates individual images with identified dust devils?)