July 24, 2012

Dwayne Brown Headquarters, Washington 202-358-1726 dwayne c brown@nasa gov

Guy Webster Jet Propulsion Laboratory, Pasadena, Calif 818-354-6278 guy webster@jpl nasa gov

RELEASE: 12-255

NASA MARS ORBITER REPOSITIONED TO PHONE HOME MARS LANDING

PASADENA, Calif -- NASA's Mars Odyssey spacecraft has successfully adjusted its orbital location to be in a better position to provide prompt confirmation of the August landing of the Curiosity rover

The Mars Science Laboratory (MSL) spacecraft carrying Curiosity can send limited information directly to Earth as it enters Mars' atmosphere Before the landing, Earth will set below the Martian horizon from the descending spacecraft's perspective, ending that direct route of communication Odyssey will help to speed up the indirect communication process

NASA reported during a July 16 news conference that Odyssey, which originally was planned to provide a near-real-time communication link with Curiosity, had entered safe mode July 11 This situation would have affected communication operations, but not the rover's landing Without a repositioning maneuver, Odyssey would have arrived over the landing area about two minutes after Curiosity landed

A spacecraft thruster burn Tuesday lasting about six seconds has nudged Odyssey about six minutes ahead in its orbit Odyssey now is operating normally, and confirmation of Curiosity's landing is expected to reach Earth at about 10:31 p m PDT Aug 5, as originally planned

"Information we are receiving indicates the maneuver has been completed as planned," said Gaylon McSmith, Mars Odyssey project manager at NASA's Jet Propulsion Laboratory (JPL), in Pasadena, Calif "Odyssey has been working at Mars longer than any other spacecraft, so it is appropriate that it has a special role in supporting the newest arrival "

Two other Mars orbiters, NASA's Mars Reconnaissance Orbiter (MRO) and the European Space Agency's Mars Express, also will be in position to receive radio transmissions from MSL during its descent However, they will be recording information for later playback Only Odyssey can relay information immediately

Odyssey arrived at Mars in 2001 In addition to its own scientific observations, it has served as a communications relay for NASA's Spirit and Opportunity Mars rovers and the Phoenix lander Spirit and Phoenix are no longer operational Odyssey and MRO will provide communication relays for Curiosity during the rover's two-year prime mission

Odyssey and MSL, with its Curiosity rover, are managed by JPL for NASA's Science Mission Directorate in Washington Curiosity was designed, developed and assembled at JPL The Odyssey spacecraft is operated by JPL and Lockheed Martin in Denver Lockheed Martin Space Systems in Denver built Odyssey

For more information about Mars Odyssey, visit:

http://mars jpl nasa gov/odyssey

For information about the Curiosity landing and other NASA Mars missions, visit:

http://www nasa gov/mars

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