Odyssey mission status |
Odyssey mission status |
Apr 8 2007, 11:27 AM
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#1
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Member Group: Members Posts: 710 Joined: 28-September 04 Member No.: 99 |
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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Apr 8 2007, 02:43 PM
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#2
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Merciless Robot Group: Admin Posts: 8789 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
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.. ..and "Monday-morning quarterbacking" isn't the intent here. Very interested in the design attributes employed for fail-operational situations on spacecraft, though. -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Apr 8 2007, 04:08 PM
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#3
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Member Group: Members Posts: 477 Joined: 2-March 05 Member No.: 180 |
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. |
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Sep 18 2007, 02:06 PM
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#4
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Member Group: Members Posts: 808 Joined: 10-October 06 From: Maynard Mass USA Member No.: 1241 |
-------------------- CLA CLL
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Sep 18 2007, 08:04 PM
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#5
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Member Group: Members Posts: 370 Joined: 12-September 05 From: France Member No.: 495 |
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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Sep 19 2007, 10:06 AM
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#6
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Senior Member Group: Moderator Posts: 4280 Joined: 19-April 05 From: .br at .es Member No.: 253 |
> ... 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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Mar 11 2009, 10:08 AM
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#7
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Senior Member Group: Admin Posts: 3108 Joined: 21-December 05 From: Canberra, Australia Member No.: 615 |
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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Mar 12 2009, 12:58 AM
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#8
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Member Group: Members Posts: 213 Joined: 21-January 07 From: Wigan, England Member No.: 1638 |
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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Apr 7 2009, 10:23 PM
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#9
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Newbie Group: Members Posts: 13 Joined: 6-April 09 Member No.: 4720 |
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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Apr 10 2009, 04:51 AM
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#10
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Merciless Robot Group: Admin Posts: 8789 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
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!
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Jan 13 2010, 09:42 PM
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#11
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
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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Jan 15 2010, 05:50 PM
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#12
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Interplanetary Dumpster Diver Group: Admin Posts: 4405 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
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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Jan 15 2010, 06:24 PM
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#13
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
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: |
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Jul 22 2010, 05:50 AM
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#14
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Member Group: Members Posts: 184 Joined: 2-March 06 Member No.: 692 |
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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Jun 22 2012, 04:07 PM
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#15
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Member Group: Members Posts: 311 Joined: 31-August 05 From: Florida & Texas, USA Member No.: 482 |
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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