Mars Exploration Rovers Update - March 2, 2004

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SPIRIT UPDATE: Grinding, Take Two - sol 58, Mar 02, 2004

On sol 58, which ends at 7:52 p.m., PST on March 2, the planned four-hour
rock abrasion tool grind of "Humphrey" was limited to only 20 minutes. The
intricate slopes and cracks of the rock make it a challenging target for
instruments. When sensors indicated a loss of contact with surface material,
the software perceived a problem and the rock abrasion tool was moved away
from the rock. Engineers are amending the software limits to duplicate the
rock abrasion tool's earlier operation on the rock "Adirondack," giving a
higher likelihood of successful completion on the next sol.

The morning began with the completion of the alpha particle X-ray spectrometer
integration on the previously brushed area. The panoramic camera then took a
multi-spectral observation of the nearby ground, followed by a Mössbauer
spectrometer integration on the same area.

Spirit's Sol 58 wake-up song was "I Still Haven't Found What I'm Looking For"
by U2 to pay homage to its twin rover's amazing findings of water evidence
at Meridiani Planum.

On sol 59, Spirit will attempt another rock abrasion tool grind on "Humphrey,"
followed by detailed observations of the hole.



OPPORTUNITY UPDATE: Let's Go to 'Last Chance' - sol 37, Mar 02, 2004

On sol 37, Opportunity woke up at 9:35 Local Solar Time to "Let's Go" by
the Cars. Opportunity completed the miniature thermal emission spectrometer
and panoramic camera surveys of the rock abrasion tool holes at "Guadalupe"
and "McKittrick," then drove 4.25 meters (14 feet) to "Last Chance," ending
the sol at 7:33 a.m. PST on Tuesday, March 2.

With the moves of a tango dancer, the drive was another intricate study in,
and challenge of, driving on a slippery, steep slope.

The rover was directed to: turn right, go forward, turn right, take images
of "Last Chance," turn right, go forward, turn left, go forward, turn right,
take images of "Big Bend," go straight, turn left and go straight! Due to
the challenges of driving and pirouetting on such a steep slope (as steep as
22 degrees) the rover found it difficult to maintain a perfectly straight
course, and Opportunity came up shy and right of the "Last Chance" target
by about 30 centimeters (about one foot).

The plan for sol 38, which will end at 8:13 a.m. PST on Wednesday, March 3
is to do a short drive again to get within arm's reach of "Last Chance."
Once in place, Opportunity will use the science instruments on the end of
the robotic arm to analyze "Last Chance."
Reply to
Ron
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Man, those NASA folks are rocket-scientists.
How many of us could do this on a flat, smooth floor and get within 30 centimeters of the target?
Now try it in the sand on a hill!
"The rover was directed to: turn right, go forward, turn right, take images of "Last Chance," turn right, go forward, turn left, go forward, turn right, take images of "Big Bend," go straight, turn left and go straight!
Due to the challenges of driving and pirouetting on such a steep slope (as steep as 22 degrees) the rover found it difficult to maintain a perfectly straight course, and Opportunity came up shy and right of the "Last Chance" target by about 30 centimeters (about one foot)."
These people are doing an incredible job.
And with solar power to boot.
Reply to
Alan Kilian
It is truly amazing. It's really neat to be able to follow the progress.
The team members must feel really lucky to be in on it.
Greg in Cincinnati
Reply to
Greg Teets

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