http://marsrovers.jpl.nasa.gov/mission/status.html

SPIRIT UPDATE: Brushing the Dust Off 'Missouri' - sol 86, 
March 31, 2004

Spirit began sol 86, which ended at 2:20 p.m. PST on March 31, 
2004, by waking up and heating the panoramic mast assembly to 
complete sky and ground stares with the miniature thermal 
emission spectrometer. Spirit completed the alpha particle 
X-ray spectrometer integration on the hole made by the
rock abrasion tool and then took a 45-minute nap. 

Once Spirit woke up, it began the 6-position rock abrasion 
tool brush mosaic on the target "Missouri" on the rock called 
"Mazatzal." Once this was completed successfully, the rover's 
arm was stowed.

Spirit then rolled backwards .9 meters (2.95 feet) to 
correctly position itself to acquire mini thermal emission
spectrometer imaging of the newly brushed mosaic, and the 
previously ground hole. In addition, Spirit took sky and 
ground stares and panoramic camera images of the upcoming 
drive direction. The sol ended with mini thermal emission 
spectrometer stares at the "Columbia Hills" and an afternoon 
pass by NASA's Mars Odyssey orbiter. 

Sol 87, which ends at 3:00 p.m. PST on April 1, 2004, will be 
a driving day for Spirit as it begins what could be a 
record-breaking journey toward the Columbia Hills. 



OPPORTUNITY UPDATE: Opportunity 'Back in the Saddle' - sol 65, 
March 31, 2004

Opportunity resumed science operations after waking to 
Aerosmith's "Back in the Saddle" on its 65th sol, which ended 
at 2:02 a.m. PST on March 31. During the martian morning, the 
miniature thermal emission spectrometer and panoramic camera 
studied the atmosphere. "Bounce" rock was imaged by the 
panoramic camera. 

Opportunity's instrument arm was then deployed to get a close-up 
view of "Bounce" using the microscopic imager. The rock abrasion 
tool team used some of these images to identify the exact target 
for next sol's grinding operation. The Moessbauer spectrometer 
was then placed on a designated target on the rock for an 
overnight integration. 

In the afternoon, Opportunity took navigation and panoramic 
camera images and completed more miniature thermal emission 
spectrometer science. 

Next sol, the rover's rock abrasion tool will grind into Bounce.


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