[meteorite-list] Mars Odyssey Enters, Then Exits, Standby Safe Mode

From: Ron Baalke <baalke_at_meteoritecentral.com>
Date: Fri, 13 Jul 2012 13:21:04 -0700 (PDT)
Message-ID: <201207132021.q6DKL4Zm011070_at_zagami.jpl.nasa.gov>


Orbiter Enters, Then Exits, Standby Safe Mode
Jet Propulsion Laboratory
July 13, 2012

Mars Odyssey Mission Status Report

PASADENA, Calif. -- NASA's Mars Odyssey orbiter experienced about 21 hours in a
reduced-activity precautionary status ending at about 10 a.m. PDT (1 p.m. EDT) on
Thursday, July 12.

The orbiter put itself in the precautionary, Earth-pointed status called safe mode,
at about 1 p.m. PDT (4 p.m. EDT) on July 11, as it finished a maneuver adjusting, or
trimming, its orbit. Odyssey's computer did not reboot, so diagnostic information was
subsequently available from the spacecraft's onboard memory. Based on analysis of
that information, the mission's controllers sent commands yesterday morning taking
Odyssey out of safe mode and reorienting it to point downward at Mars.

"We are on a cautious path to resume Odyssey's science and relay operations soon," said
Gaylon McSmith, Odyssey project manager at NASA's Jet Propulsion Laboratory, Pasadena,
Calif. "We will also be assessing whether another orbit trim maneuver is warranted."

The thruster burn for Wednesday's orbit-trim maneuver lasted 1.5 seconds, as planned,
which was shorter than any previous orbit-trim maneuver of the mission's decade at Mars.
The spacecraft's onboard capability for maintaining orientation during the burn put
unexpectedly high demand on a reaction wheel in the attitude control system, which
prompted the change to safe mode.

NASA launched the Mars Odyssey spacecraft on April 7, 2001, and it arrived at Mars
Oct. 24, 2001. It has worked at Mars longer than any other Mars mission in history.
Besides conducting its own scientific observations, it serves as a communication relay
for robots on the Martian surface. NASA plans to use Odyssey and the newer Mars
Reconnaissance Orbiter as communication relays for the Mars Science Laboratory mission
during the landing and Mars-surface operations of its Curiosity rover.

Odyssey is managed by JPL for NASA's Science Mission Directorate in Washington. Lockheed
Martin Space Systems in Denver built the spacecraft. JPL and Lockheed Martin collaborate
on operating the spacecraft. For more about the Mars Odyssey mission, visit:
http://mars.jpl.nasa.gov/odyssey .

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

Received on Fri 13 Jul 2012 04:21:04 PM PDT

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