Headlines > News > Free Spirit - Second Extrication Drive Yields Slight Progress

Free Spirit - Second Extrication Drive Yields Slight Progress

Published by Matt on Fri Nov 20, 2009 11:48 am via: source
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Spirit successfully completed the first step of its planned two-step motion on Sol 2090 (Nov. 19).

This blink comparison documents very slight forward movement of NASA's Mars Exploration Rover Spirit during a drive on the rover's 2,090th Martian day, or sol (Nov. 19, 2009). Image Credit: NASA/JPL-Caltech

This blink comparison documents very slight forward movement of NASA's Mars Exploration Rover Spirit during a drive on the rover's 2,090th Martian day, or sol (Nov. 19, 2009). Image Credit: NASA/JPL-Caltech

After spinning the wheels for the equivalent of 2.5 meters (8.2 feet) in the forward direction, the center of the rover moved approximately 12 millimeters (0.5 inch) forward, 7 millimeters (0.3 inch) to the left and about 4 millimeters (0.2 inch) down. The rover tilt changed by about 0.1 degree. Small forward motion was observed with the non-operable right front wheel, and the left front wheel showed indications of climbing, despite the center of the rover moving downward. These motions are too small to establish any trends at this time.

The drive plan had imposed a limit of 1 centimeter (0.4 inch) motion in any direction. The second step of the drive was not performed, because Spirit calculated it had exceeded that limit.

The data downlink volume from the rover was much better than expected, with all drive-related imagery being received. The team is continuing to analyze results from the drive.

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