From: Jet Propulsion Laboratory
Posted: Thursday, November 6, 2008
Opportunity Status for sol 1674-1680
Opportunity got some good vibrations going this week while trying to remove dust from the mirror of the miniature thermal emission spectrometer, an instrument that measures temperatures and detects minerals from a distance. Using low-level motor commands on the rover's 1,680th sol, or Martian day of exploration (Oct. 14, 2008), Opportunity created a short vibration to shake the instrument's external scan mirror. It was the first time Opportunity attempted such a feat, and scientists are analyzing the results.
Opportunity also got into position for the final imaging campaign at "Victoria Crater," driving onto a promontory known as "Cape Agulhas." From here, the rover acquired images of rocks exposed in a promontory known as "Cape Victory."
Other remote-sensing highlights of the week included measurements of argon gas in the atmosphere on sols 1675, 1677 and 1680 (Oct. 9, 11, and 14, 2008) and color images of an area of bedrock in front of the rover nickamed "Savu Sea" on sol 1676 (Oct. 10, 2008). Opportunity took images of a weathered rock exposure known as "Dauphin," surveyed the horizon, and took spot images of the sky for calibration purposes. The rover monitored dust on the panoramic-camera mast assembly, searched for clouds, and studied the atmosphere.
Opportunity remains healthy, with all subsystems performing as expected as of Martian day, or sol, 1680 (Oct. 14, 2008). Power has been averaging 616 watt-hours during the past week (100 watt-hours is the amount of energy needed to light a 100-watt bulb for one hour.)
Besides measuring daily, dust-related changes in atmospheric clarity with the panoramic camera, Opportunity completed the following activities:
Sol 1674 (Oct. 8, 2008): During the day's drive, Opportunity acquired a 2-by-1 panel of images with the navigation camera. After the drive, Opportunity acquired a 5-by-1 tier of navigation-camera images, a 4-by-1 tier of forward-looking, panoramic-camera images, and a 5-by-1 tier of rearward-looking, navigation-camera images.
Sol 1675: In the morning, Opportunity surveyed the horizon with the panoramic camera. The rover took thumbnail images of the sky for calibration purposes with the panoramic camera and scanned the sky for clouds by acquiring four time-lapse images with the navigation camera. After relaying data to NASA's Odyssey orbiter to be transmitted to Earth, Opportunity measured atmospheric argon with the alpha-particle X-ray spectrometer.
Sol 1676: Opportunity acquired full-color images, using all 13 filters of the panoramic camera, of Savu Sea. The rover continued driving, acquiring a 2-by-1 panel of forward-looking images along the way with the navigation camera. After the day's drive, Opportunity took a 5-by-1 tier of images with the navigation camera, a 4-by-1 panel of images of the road ahead with the panoramic camera, and a 5-by-1 tier of rearward-looking images with the navigation camera.
Sol 1677: In the morning, Opportunity monitored dust accumulation on the rover mast. After sending data to Odyssey, Opportunity integrated measurements of atmospheric argon with the alpha-particle X-ray spectrometer.
Sol 1678: Opportunity acquired systematic, full-color images of the foreground with the panoramic camera. The rover spent much of the day recharging the battery.
Sol 1679: Opportunity took morning spot images of the sky for calibration purposes and a 2-by-1 panel of pre-drive images of Dauphin with the panoramic camera. The rover drove to the next imaging location on Cape Agulhas, acquiring a 2-by-1 panel of forward-looking images before ending the drive with the navigation camera. After the drive, Opportunity acquired a 3-by-1 standard tier and a 7-by-1 rearward-looking tier of images with the navigation camera. The rover transmitted data to Odyssey.
Sol 1680 (Oct. 14, 2008): Opportunity took spot images of the sky with the panoramic camera and searched for morning clouds with the navigation camera by pointing it skyward and acquiring a six-frame, time-lapse movie. Opportunity acquired a 3-by-1 panel of color images of Cape Victory with the panoramic camera and a high-resolution view of the rover deck with the navigation camera. The rover acquired images with the navigation camera to provide context for measurements by the miniature thermal emission spectrometer. Before shaking the spectrometer's mirror, Opportunity checked for drift (changes with time) in the instrument, conducted an operational test, and surveyed the ground and sky with the instrument for comparison purposes. Finally, Opportunity conducted the shake test, operating the motor in such a way as to vibrate the mirror in an effort to shake off dust. After sending test results and other data to Odyssey, Opportunity measured argon gas in the atmosphere with the alpha-particle X-ray spectrometer.
As of sol 1679 (Oct. 13, 2008), Opportunity's corrected total odometry was 12,362.95 meters (7.68 miles).
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