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 Apr 4 2005, 02:38 PM
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Junior Member  Group: Members Posts: 90 Joined: 13-January 05 Member No.: 143  |
I just heard that Odyssey went into safe mode on Saturday. I haven't seen any official announcement yet.
One result is that MER is having to replan using direct to earth only. Current estimate is that Odyssey will not be able to support UHF relay until "mid-week at the earliest". |
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Apr 4 2005, 04:18 PM
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 Member Group: Members Posts: 578 Joined: 5-November 04 From: Denmark Member No.: 107 |
QUOTE (Sunspot @ Apr 4 2005, 04:03 PM) Are they still able to command the rovers in the normal way, just not transmit large amounts of data? I suppose they've put off all driving and science activities until the problem is resolved?   Why should they do that? Just send commands and downlink via direct to Earth sessions. And Why has MGS not been used for relay as much as Odessey? -------------------- "I want to make as many people as possible feel like they are part of this adventure. We are going to give everybody a sense of what exploring the surface of another world is really like"
- Steven Squyres |
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Apr 4 2005, 06:22 PM
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
QUOTE (dot.dk @ Apr 4 2005, 04:18 PM) downlink via direct to Earth sessions. One 12 minute UHF pass with Odyssey = 184 Mbits Typically done 2 times per sol, call it 300 Mbits. 300 Mbits at 8kbps DTE (on DSN antennae already scheduled for other missions) = 10.4 hrs. The most they could use the DTE for in a sol is a couple of hours, it takes a lot of power, and means that a single sols data would take perhaps 4 sols to downlink - during which time, the flash memory will have filled up - two fold  MGS uses the MOC buffer for UHF ops - and so it plays hell with scheduling of MGS ops - has to be planned quite well in advance. Odyssey was doing more than enough for relay ops - so MGS was turned back to mapping ops. They only uplink to MGS about 3 or 4 times a week - and the sequence to include fill-in UHF passes would take a week or so to write - so by the time they've written the sequences, uplinked them....Odyssey will be back on course Doug |
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mars_armer Safe Mode Apr 4 2005, 02:38 PM
djellison Now that's bad news. I suppose they could bri... Apr 4 2005, 02:55 PM
MahFL I was wondering why there were no new images since... Apr 4 2005, 03:25 PM Sunspot Are they still able to command the rovers in the n... Apr 4 2005, 04:03 PM tedstryk QUOTE (dot.dk @ Apr 4 2005, 04:18 PM)QUOTE (S... Apr 4 2005, 04:51 PM dvandorn QUOTE (djellison @ Apr 4 2005, 12:22 PM)QUOTE... Apr 4 2005, 07:10 PM cIclops QUOTE (dvandorn @ Apr 4 2005, 07:10 PM)Heck -... Apr 4 2005, 07:26 PM tedstryk [/quote]
Makes you appreciate why Squyres, in one... Apr 4 2005, 08:27 PM djellison A typical rover day - roughtly - in local solar t... Apr 4 2005, 04:21 PM mars_armer QUOTE (djellison @ Apr 4 2005, 04:21 PM)The b... Apr 4 2005, 06:44 PM Sunspot I think they were planning 2 days of imaging at Vi... Apr 4 2005, 04:48 PM dot.dk Can't wait for relay via MRO then hehe Apr 4 2005, 05:01 PM dot.dk IF Odessey is crippled could they use Mars Express... Apr 4 2005, 07:28 PM djellison I'll hold one end - and you start walking, sto... Apr 4 2005, 07:28 PM alan There have been three images (full resolution not ... Apr 4 2005, 08:36 PM mars_armer QUOTE (alan @ Apr 4 2005, 08:36 PM)There have... Apr 4 2005, 09:16 PM dvandorn I've done some extensive Googling, and can... Apr 5 2005, 08:13 PM cIclops QUOTE (dvandorn @ Apr 5 2005, 08:13 PM)I... Apr 5 2005, 08:50 PM mars_armer QUOTE (dvandorn @ Apr 5 2005, 08:13 PM)I... Apr 5 2005, 10:02 PM slinted Just a quick mention, with regards to the importan... Apr 6 2005, 12:12 AM djellison QUOTE (slinted @ Apr 6 2005, 12:12 AM)So, if ... Apr 6 2005, 08:54 AM Sunspot Yikes....this is starting to sound REALLY bad for ... Apr 6 2005, 09:45 AM djellison I'm quite disgusted by the lack of information... Apr 6 2005, 09:52 AM Sunspot .....it seems the people that use and read this me... Apr 6 2005, 10:02 AM djellison If anyone wants to poke around somewhere they prob... Apr 6 2005, 10:14 AM chris QUOTE (djellison @ Apr 6 2005, 10:14 AM)07925... Apr 6 2005, 10:44 AM RedSky QUOTE (djellison @ Apr 6 2005, 05:14 AM)If an... Apr 6 2005, 10:05 PM cIclops Finally an "official" story from NASA ab... Apr 9 2005, 09:20 AM djellison Well - that would have been about Feb 10th
If th... Apr 6 2005, 10:53 AM chris QUOTE (djellison @ Apr 6 2005, 10:53 AM)Well ... Apr 6 2005, 11:36 AM OWW Thanks Doug for that link. Look at this pdf on tha... Apr 6 2005, 12:31 PM djellison QUOTE (ObsessedWithWorlds @ Apr 6 2005, 12:31... Apr 6 2005, 04:27 PM alan Twenty new navcams were added at exploratorium 15 ... Apr 6 2005, 09:15 PM mars_armer QUOTE (alan @ Apr 6 2005, 09:15 PM)Twenty new... Apr 6 2005, 09:33 PM Sunspot Either they didnt drive or the drive stalled as Sp... Apr 9 2005, 11:38 AM |
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