Sol 3937, February 20, 2015. Opportunity’s Pancam is imaging the walls of Marathon Valley through multiple filters; this five-frame composite uses the left-side imager’s red-sensitive filter. (Click the image to load a larger version in a new tab.)
The process goes slowly because the rover is still operating in RAM-only mode. This limits how much data can be taken each day because none can be stored overnight. Whatever doesn’t get sent to Earth each sol disappears when the rover goes to sleep each night.
Opportunity raw images, its latest mission status, a location map. and atmospheric opacity, known as tau.