Long-lived Mars Odyssey orbiter resumes work with fresh equipment

Nov 13, 2012 by Guy Webster
NASA's Mars Odyssey spacecraft passes above Mars' south pole in this artist's concept illustration. The spacecraft has been orbiting Mars since October 24, 2001. Credit: NASA/JPL

(Phys.org)—The NASA Mars Odyssey orbiter has resumed duty after switching to a set of redundant equipment, including a main computer, that had not be used since before the spacecraft's 2001 launch.

Odyssey relayed data to Earth late Sunday that it received from NASA's on Mars using the orbiter's fresh "B-side" radio for UHF (ultra-high frequency) communications. In plans for this week are relay opportunities for the newest Mars rover, Curiosity, and resumption of Odyssey's own scientific observations.

"The side-swap has gone well. All the subsystems that we are using for the first time are performing as intended," said Odyssey Project Manager Gaylon McSmith of NASA's Jet Propulsion Laboratory, Pasadena, Calif.

Like many spacecraft, this orbiter carries a pair of redundant main computers, to have a backup available if one fails. Odyssey's A-side computer and B-side computer each have several other redundant subsystems linked to just that computer.

Odyssey is already the longest-working spacecraft ever sent to Mars. The side swap was initiated last week in response to months of diagnostic data indicating that the A side's inertial measurement unit shows signs of wearing out. This -containing mechanism senses changes in the spacecraft's orientation, providing important information for control of pointing the antenna, and instruments.

The diagnostics indicate that the A side's inertial measurement unit still has a few months or more of useful life. The reason for switching sides was to keep a fully functional A side available in case of any problem on the B side in coming years that can be dealt with by switching back to the A side temporarily for a few days or weeks.

"It is testimony to the excellent design of this spacecraft and operation of this mission in partnership with that we have brand-new major components available to begin using after more than 11 years at Mars," McSmith said.

JPL, a division of the California Institute of Technology in Pasadena, manages the project 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.

The Mars Reconnaissance Orbiter, which shares with Odyssey the data-relay responsibility for NASA's , continued relay support while Odyssey was unavailable for a few days following the side swap.

Odyssey launched April 7, 2001, began orbiting Mars Oct. 24 that year, began systematic science observations of Mars in early 2002, and broke the previous record for longest-working Mars spacecraft in December 2010. Odyssey's longevity enables continued science by instruments on the orbiter, including the monitoring of seasonal changes on Mars from year to year, in addition to communication-relay service. For more about the Mars Odyssey mission, visit: http://.jpl.nasa.gov/odyssey .

Explore further: Best evidence yet for coronal heating theory detected by NASA sounding rocket

Related Stories

Mars longevity champ switching computers

Nov 02, 2012

(Phys.org)—NASA's Mars Odyssey orbiter, already the longest-working spacecraft ever sent to Mars, will switch to some fresh, redundant equipment next week that has not been used since before launch in 2001.

Mars Odyssey Orbiter is back in service

Jun 28, 2012

(Phys.org) -- NASA's Mars Odyssey orbiter has resumed its science observations and its role as a Mars rover's relay, thanks to a spare part that had been waiting 11 years to be put to use.

Mars Odyssey orbiter out of precautionary 'safe mode'

Jun 20, 2012

(Phys.org) -- NASA's Mars Odyssey orbiter has been taken out of a protective status called safe mode. Remaining steps toward resuming all normal spacecraft activities will probably be completed by next week.

Orbiter enters, then exits, standby safe mode

Jul 16, 2012

(Phys.org) -- 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.

Recommended for you

Rosetta measures comet's temperature

11 hours ago

(Phys.org) —ESA's Rosetta spacecraft has made its first temperature measurements of its target comet, finding that it is too hot to be covered in ice and must instead have a dark, dusty crust.

How Rosetta arrives at a comet

13 hours ago

After travelling nearly 6.4 billion kilometres through the Solar System, ESA's Rosetta is closing in on its target. But how does a spacecraft actually arrive at a comet?

Lunar occultation of Saturn

13 hours ago

On the night of Monday August 4, mainland Australia will see Saturn disappear behind the moon. It's the third time this year that the moon and Saturn will perfectly line up, as viewed from our part of the ...

User comments : 0