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Odyssey mission status
OWW
post Apr 8 2007, 11:27 AM
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http://mars.jpl.nasa.gov/odyssey/newsroom/.../20070327a.html

Engineers for NASA's Mars Odyssey mission are examining data from the orbiter to determine whether onboard backup systems never used by the 6-year-old spacecraft could still be available if needed.

Odyssey reported last week that a power processing component of the backup, or "B-side," systems had stopped working. The component, the high-efficiency power supply, has a twin that is continuing to serve the "A-side" hardware, which is operating normally. Odyssey has stayed on its A-side systems, including the A-side flight computer, since launch on April 7, 2001. However, the A-side power supply cannot serve most systems on the B-side, including the backup B-side computer. If engineers do not determine a way to restore the B-side power supply, most of the backup hardware would not be available, if it were ever needed.

Odyssey is in its second extended mission. The orbiter is conducting scientific observations and also serving as the primary communications relay for NASA's Mars rovers. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology, Pasadena, manages the Mars Odyssey Project for NASA's Science Mission Directorate, Washington. Lockheed Martin Space Systems, Denver, is the prime contractor for the project and built the spacecraft.


I hope Odyssey is not one failure away from another MGS-type loss because of this.
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nprev
post Apr 8 2007, 02:43 PM
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Sounds kind of ominous, all right. Surprised that such a critical component apparently doesn't have a fail-safe operational mode, or a separate backup unit; not enough internal redundancy? Come to that, why weren't the two power systems designed to allow crossfeeding?

I'm sure there are good answers to these questions just as sure as I am that I don't know anything about Odyssey's design.. smile.gif ..and "Monday-morning quarterbacking" isn't the intent here. Very interested in the design attributes employed for fail-operational situations on spacecraft, though.


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Jeff7
post Apr 8 2007, 04:08 PM
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So this sounds like kind of good bad news - bad news that's not really too awfully bad. As I understand it, the primary systems are still just peachy, but the backups are getting flaky.
Hopefully they do figure this out though. Those folks at NASA and JPL seem to work remote miracles on their hardware. It's a testament of good engineering when a malfunctioning robot is still capable of not only keeping itself going (generally), but also transmitting diagnostics information back home. True they can't account for everything, otherwise MGS might still be going, but they can apparently deal with quite a bit. Spirit pulled through a pretty nasty problem early on. And heck, now Spirit's pulling a nasty problem along with for a ride - its right front wheel. laugh.gif
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PDP8E
post Sep 18 2007, 02:06 PM
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Odyssey Off-line Due to Glitch

http://news.yahoo.com/s/ap/20070918/ap_on_sc/mars_probes


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Rakhir
post Sep 18 2007, 08:04 PM
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Odyssey Returning to Service After Taking Precaution
http://www.jpl.nasa.gov/news/features.cfm?feature=1473

The spacecraft is expected to point its instruments and UHF relay antenna toward Mars today (Tuesday), to resume relaying communications from the Mars rovers on Wednesday.
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Tesheiner
post Sep 19 2007, 10:06 AM
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> ... to resume relaying communications from the Mars rovers on Wednesday.

Today is Wednesday. The next UHF relay session is with Spirit at 12:06 UTC and the data should be downlinked at 15:55 UTC hitting the exploratorium web at 16:35.

Cross your fingers.
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Astro0
post Mar 11 2009, 10:08 AM
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We just take Odyssey for granted.But it has issues at the moment.

Unexpected temperature rise in the star camera has delayed a system reboot.
http://www.nasa.gov/mission_pages/odyssey/...y-20090310.html

Related story on the reason for the reboot.
http://www.nasa.gov/mission_pages/odyssey/...y-20090304.html
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Del Palmer
post Mar 12 2009, 12:58 AM
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Looks like the procedure went well and redundancy has been restored:

http://www.jpl.nasa.gov/news/news.cfm?release=2009-046
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Nomadd22
post Apr 7 2009, 10:23 PM
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Kinda funny that after two years of worrying about the bad power supply the solution was to turn it off and back on again.
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nprev
post Apr 10 2009, 04:51 AM
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It's the "back on again" part that's worth two years of study before turning off something that's a couple of hundred million kms away, though. Well done, Odyssey team! smile.gif


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Paolo
post Jan 13 2010, 09:42 PM
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I am trying to locate the exact date in late 2003 when Odyssey's orbit was frozen to 5 PM equator crossing. Can anybody help?
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tedstryk
post Jan 15 2010, 05:50 PM
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I don't think that is correct. I believe it was February 19, 2002.

QUOTE
The Mapping Phase began once the 400 km science orbit with
approximately 5 PM equator crossing was achieved, at
19-Feb-2002 17:14:32 UTC. This time marked the beginning
of orbit number 816. The intensive science portion lasted
917 days, with at least one of the three science instruments
operating at all times throughout that period.



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Paolo
post Jan 15 2010, 06:24 PM
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From Saunders, "2001 Mars Odyssey Mission Summary" (Space Science Reviews, 110, 2004, 1-36;
QUOTE
During the first 670 days of the mapping phase, the LMST drifts at a constant rate from its initial value of 3:54 p.m. to 5:00 p.m. At that time a maneuver using 8 m/s of delta-V will lock LMST to 5 p.m.


see also this image from the same paper:

Attached thumbnail(s)
Attached Image
 
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monty python
post Jul 22 2010, 05:50 AM
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According to marsprogram.jpl.nasa.gov, Odyssey went into safe mode on july 14. The reason - an encoder controlling a gimbal that moves the solar array didn't perform correctly. A redundant encoder was switched in and the gimbal itself performed well. Full opps should resume this week. YAAAY!!

Brian
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Marz
post Jun 22 2012, 04:07 PM
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Odyssey is back online after switching to a spare reaction wheel. Hang in there!

http://news.yahoo.com/mars-odyssey-spacecr...-155336794.html
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