Tests on Earth to Help Free Spirit Rover on Mars: Live Webcast, Chat
A live videocast and chat from JPL will give viewers a chance to ask questions of rover team members working to get Spirit rolling again.
The team that operates rovers on Mars is using a test rover in southern 
California to assess maneuvers the Mars rover Spirit might use to get out 
of soft, loose soil where its wheels have sunk hub-deep.  A live videocast 
and chat from NASA's Jet Propulsion Laboratory, Pasadena, Calif., will give 
viewers a chance to ask questions of rover team members working to get 
Spirit rolling again.The live event will air on the "NASAJPL" channel available on Ustream Web TV 
at:http://www.ustream.tv/channel/nasajplon Thursday, July 23, beginning 
at 3 p.m. PDT (6 p.m. EDT and 2200 UTC).Spirit and its twin, Opportunity, landed on Mars in January 2004 for what were 
planned as three-month missions to study sites on opposite sides of the planet. 
Both are still active and returning streams of scientific information. Spirit 
has not driven since May 6, 2009, when it had become partially embedded in the 
soil. To minimize the risk of worsening Spirit's predicament, operators decided 
to conduct a series of experiments with a test rover before driving Spirit again.Participants in the July 23 event include:-- John Callas, project manager for NASA's Mars Exploration Rovers, Spirit and Opportunity.-- Ashley Stroupe, JPL rover planner, deputy lead for "Free Spirit" testingViewers may submit questions over Ustream or via Twitter.  Twitter users may send 
their questions to @NASAJPL using the hashtag #FreeSpirit. In addition, if you are 
unable to take part in the live chat, you may submit questions in advance tochatquestion@jpl.nasa.govand watch the archived video at a later time.Information about Spirit and Opportunity is available athttp://www.nasa.gov/rovers. 
Updates about testing of possible maneuvers for freeing Spirit are athttp://www.jpl.nasa.gov/freespirit.JPL is managed for NASA by the California Institute of Technology, Pasadena.