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MARSDAILY
Rover takes on steepest slope ever tried on Mars
by Staff Writers
Pasadena CA (JPL) Apr 04, 2016


A shadow and tracks of NASA's Mars rover Opportunity appear in this March 22, 2016, image, which has been rotated 13.5 degrees to adjust for the tilt of the rover. Image courtesy NASA/JPL-Caltech. For a larger version of this image please go here.

NASA's long-lived Mars rover Opportunity is driving to an alternative hillside target after a climb on the steepest slope ever tackled by any Mars rover. Opportunity could not quite get within reach of a target researchers hoped the rover could touch earlier this month.

A new image shows the view overlooking the valley below and catches the rover's own shadow and wheel tracks as Opportunity heads toward its next target.

The rover's tilt hit 32 degrees on March 10 while Opportunity was making its closest approach to an intended target near the crest of "Knudsen Ridge."

Engineers anticipated that Opportunity's six aluminum wheels would slip quite a bit during the uphill push, so they commanded many more wheel rotations than would usually be needed to travel the intended distance.

Results from the drive were received in the next relayed radio report from the rover: The wheels did turn enough to have carried the rover about 66 feet (20 meters) if there had been no slippage, but slippage was so great the vehicle progressed only about 3.5 inches (9 centimeters). This was the third attempt to reach the target and came up a few inches short.

The rover team reached a tough decision to skip that target and move on.

Both the intended target near the top of the ridge and the current target area farther west are on the hillside forming the southern edge of "Marathon Valley," which slices east-west across the raised western rim of Endeavour Crater. Both targets are in areas where mineral-mapping observations by NASA's Mars Reconnaissance Orbiter have identified clay minerals, which form in the presence of water.

The March 10 drive surpassed Opportunity's own previous record for the steepest slope ever driven by any Mars rover. That record was accomplished while Opportunity was approaching "Burns Cliff" about nine months after the mission's January 2004 landing on Mars.

In eight drives between the steepest-ever drive and March 31, Opportunity first backed downhill, northward, for about 27 feet (8.2 meters), then drove about 200 feet (about 60 meters) generally southwestward and uphill, toward the next target area.


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Previous Report
MARSDAILY
Opportunity moves to new locations to the southwest
Pasadena CA (JPL) Mar 28, 2016
Opportunity is exploring the south side of 'Marathon Valle' located on the rim of Endeavour crater. The rover is up on the slopes of 'Knudsen Ridge'. The objective is to identify specific outcrops for evidence of clay minerals. Opportunity recently backed down off of some of the steepest slopes of the mission and has begun the move to new locations to the southwest. Supporting Naviga ... read more


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