The live event will air on the "NASAJPL" channel available on Ustream Web TV at: http://www.ustream.tv/channel/nasajpl on 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" testing
Viewers 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 to email@example.com and watch the archived video at a later time.
Information about Spirit and Opportunity is available at http://www.nasa.gov/rovers. Updates about testing of possible maneuvers for freeing Spirit are at http://www.jpl.nasa.gov/freespirit .
JPL is managed for NASA by the California Institute of Technology, Pasadena.