Tilt Parameters End First Extrication Drive for Spirit

Nov 17, 2009
This mosaic of images from the Spirit rover, taken on Sol 1925 (June 2, 2009), helped engineers assess the rover's state and plan Spirit's extraction from the soft soil at the site called "Troy." The images were taken by Spirit's microscopic imager instrument, mounted on the end of the robotic arm. Image Credit: NASA/JPL-Caltech/Cornell/USGS

(PhysOrg.com) -- The preliminary results from the first extrication drive for Spirit on Sol 2088 (Nov. 17, 2009) indicate the rover stopped less than 1 second after it began, sensing more vehicle lateral tilt than permitted.

A tight limit on vehicle roll and pitch of less than 1 degree change was set for this first drive. As the rover began its first move, it sensed that its roll was outside the allowed limit and safely stopped the drive.

The project is starting cautiously, setting initial parameters with very tight limits with the knowledge that these hair triggers may stop the rover frequently. As the project gains confidence with extrication, these limits may be relaxed. From this limited drive the team now has a more accurate measurement of vehicle roll and pitch that will be used for subsequent drive planning. Analysis is continuing.

Completion of planning for the next drive will be no sooner than Wednesday, Nov. 18.

The attempt to extract Spirit from the Martian trap is expected to take weeks or months, with uncertain probability of success.

Provided by JPL/NASA (news : web)

Explore further: Collaboration aims to reduce, treat vision problems in astronauts

add to favorites email to friend print save as pdf

Related Stories

Mars Rover Team Diagnosing Unexpected Behavior

Jan 28, 2009

(PhysOrg.com) -- The team operating NASA's Mars Exploration Rover Spirit plans diagnostic tests this week after Spirit did not report some of its weekend activities, including a request to determine its orientation ...

Spirit Studies Layered Rocks

Feb 26, 2006

Spirit will soon be on top of the rugged plateau known as "Home Plate," which features the most spectacular layering Spirit has yet encountered, and begin taking images of the surrounding terrain. Spirit had ...

Spirit Completes Studies Of Arad, Moves On

Feb 03, 2006

Spirit is healthy and continues to pursue the short-term goal of driving to 'Home Plate.' Results from scientific instruments on the rover's robotic arm indicate that the white soil target called 'Arad' has a salty chemistry ...

Spirit Wiggles Into A Sturdy Workspace

Oct 19, 2005

Spirit is healthy and spent the week examining a rock called "Hillary" at the true summit of "Husband Hill." The first attempt to approach Hillary ended with a small pebble under Spirit's left front wheel, and the stability ...

Opportunity Rover Inspecting 'Bellemont'

Feb 26, 2006

Opportunity has completed its work on the "Olympia" outcrop. This week's activities included a Moessbauer spectrometer integration on target "Rough Rider," an alpha particle X-ray spectrometer integration on ...

Free Spirit: Rock Under the Belly

Jul 02, 2009

Engineers placed a rock underneath the test rover at NASA's Jet Propulsion Laboratory, Pasadena, Calif., on July 1, 2009, to more closely simulate Spirit's predicament on Mars.

Recommended for you

Light of life

8 hours ago

A fluorescent microscopic view of cells from a type of bone cancer, being studied for a future trip to deep space – aiming to sharpen our understanding of the hazardous radiation prevailing out there.

Local model better describes lunar gravity

13 hours ago

Two satellites orbiting the Moon as a part of NASA's Gravity Recovery and Interior Laboratory (GRAIL) mission have been mapping its inner structure by measuring subtle shifts in the pull of gravity on the ...

User comments : 0