Opportunity is happy to be moving again and it's heading back to "Purgatory Dune." The rover's wheels dug wonderful trenches during its egress, and the science team is eager to get the robotic arm out and have a look at the soil inside and outside of the tracks. As you can imagine, Opportunity has been driving very carefully, backing away from the dune, turning around and then re-approaching it.
490: (June 9, 2005) Drive away from Purgatory Dune.
491-493: Over the weekend the rover team had a problem with the uplink. On sol 491 they were loading all files for sols 491, 492 and 493. Due to an error at the Deep Space Network antenna, the sol 492 master file was not loaded. A drive scheduled for 492 did not occur. The 491 master file performed the run out science submaster and then self-recovered on sol 493. The vehicle was never in any danger and autonomously continued its science objectives.
494: First half of turning around. The team must turn the rover around, using a "k-turn" maneuver (a three-point turn that mimics the sideways "v" formation of the letter "k") to approach the Purgatory Dune with the robotic arm.
496: Second half of the "k-turn."