MGS in Trouble, Formerly: MGS in safe mode |
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MGS in Trouble, Formerly: MGS in safe mode |
Guest_Analyst_* |
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#31
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SWTB - Solar Array Wing tip brake?
SR - Switch ...?? |
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#32
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Founder ![]() ![]() ![]() ![]() Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 ![]() |
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#33
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Member ![]() ![]() ![]() Group: Members Posts: 470 Joined: 24-March 04 From: Finland Member No.: 63 ![]() |
You have to remember, MGS might be out of HiRise's focus at 100km. Though the focus is adjustable, I don't know if its this much adjustable, and whether they would do a major adjust right at the beginning of the PSP.
Should still look pretty good. -------------------- Antti Kuosmanen
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#34
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Founder ![]() ![]() ![]() ![]() Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 ![]() |
Two more of whatever those things were...followed by two SCGNT :
CODE mi2128 94 SRSWTB 2006-314T19:29:16.4 2006-314T19:29:56.3 Radiated mi2128 94 SRSWTB 2006-314T20:09:08.8 2006-314T20:09:48.7 Radiated mi2177 94 SCGCNT 2006-314T21:26:58.4 2006-314T21:27:38.3 Radiated mi2177 94 SCGCNT 2006-314T22:07:39.4 2006-314T22:08:19.3 Radiated Doug |
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#35
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![]() Member ![]() ![]() ![]() Group: Members Posts: 428 Joined: 21-August 06 From: Northern Virginia Member No.: 1062 ![]() |
Doug,
Where do you get that kind of info? Just curious... Anyways, unless something drastic happens, it's looking more likely like JPL will have to take more drastic options to try and find MGS, feel free to use your imagination. Also note that everything public about the possibility of MRO photographic MGS mentions MRO, no specific instruments were mentioned. |
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#36
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![]() Senior Member ![]() ![]() ![]() ![]() Group: Moderator Posts: 2262 Joined: 9-February 04 From: Melbourne - Oz Member No.: 16 ![]() |
Have we gone past the 7 days out of contact yet?
It still seems likely to me that MGS is happily pointing her arrays at the sun and waiting for 7 days before attempting to contact Earth through the HGA, as she is programmed to do in safe mode. -------------------- |
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#37
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Founder ![]() ![]() ![]() ![]() Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 ![]() |
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#38
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![]() Member ![]() ![]() ![]() Group: Members Posts: 103 Joined: 12-February 05 From: Utah Member No.: 167 ![]() |
Does this "radiation log" mean MGS is still alive?? Have they regained contact? Let's hope so!
-------------------- - My signature idea machine is busted right now.
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#39
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Founder ![]() ![]() ![]() ![]() Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 ![]() |
It doesn't really tell us anything to be honest - it's guess work at best, but it's a list of the sequences being sent TO the spacecraft, not ones being recieved from it....and the same sequence being sent many times over would be suggestive (I would have thought) of an unresponsive spacecraft.
Lots more commands radiated overnight, including.... Reset a sun-angle timer to a different time. that's looped a few times, and then Turn on telementry modulation Switch that to 10bps then that gets looped a couple of times They've radiated 50 commands in the last 24 hours. Doug |
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Guest_Analyst_* |
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#40
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It's only guessing, and I guess they have not got telemetry back because almost every block of commands ends with "Turn on TWTA". Without a working TWTA you can't get telemetry.
Analyst |
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#41
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Founder ![]() ![]() ![]() ![]() Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 ![]() |
Well - we've had this loop of 5 commands
CODE mi2148 94 CXSPG1 2006-315T04:00:33.3 2006-315T04:01:13.2 Radiated mi2149 94 CXSPG2 2006-315T04:01:31.3 2006-315T04:02:11.3 Radiated mi2150 94 TCM1MN 2006-315T04:02:31.4 2006-315T04:03:11.3 Radiated mi2151 94 TCM2MN 2006-315T04:03:47.4 2006-315T04:04:27.3 Radiated mi1523 94 STRPAN 2006-315T04:05:37.7 2006-315T04:06:17.7 Radiated And it was run at..... 04:00 05:18 05:58 07:58 09:13 09:53 11:12 11:51 13:09 13:55 That's time gaps of... 78,50,120,75,40,79,39, 78 and 46 minutes. basically cycling between 80 ish and 50ish with one odd one ( perhaps a DSN handover) looks to me like they're trying at the two 'sides' of the orbit with 80ish mins being hte visible time and 40 mins being the occulted time. Unfortunately, space.jpl.nasa.gov doesn't include Mars spacecraft in orbit, and http://mars1.jpl.nasa.gov/mgs/realtime/mgs1.jpg is very very broken ![]() Doug |
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Guest_Analyst_* |
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#42
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There are small variations in this 5 command pattern lately.
Could it be that MGS is in a command loss routine, switching (by itself) between different hardware components with the goal to deselect a failed one and doing this until one of the commands sent here again and again comes through? Analyst |
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#43
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![]() Member ![]() ![]() ![]() Group: Members Posts: 103 Joined: 12-February 05 From: Utah Member No.: 167 ![]() |
Yikes...thanks for the answers. Guess we'll be waiting for the Hirise picture of MGS to tell us more. If this truly is the end, then let's salute MGS for a decade of service over Mars and a job well done.
-------------------- - My signature idea machine is busted right now.
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#44
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Founder ![]() ![]() ![]() ![]() Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 ![]() |
My best efforts in understanding what the sequences are is limited - but there are specific, multiple references to some of them...
CXSPG1 and 2 are "Set the modulation index for 10 bps data rate" on both Box Sides XSU1 and 2. The XSU's are cross strap units for routing telemetry to the SSR's or Telecoms. TCM1MN and TCM2MN turns telemetry modulation on for MOT 1 and 2 The MOT's are Mars Orbiter Transponders STRPAN turns on the TWTA. To try and put it all in to context - attached is an extract from http://mars.jpl.nasa.gov/mgs/pdf/SE012V1.PDF I wish someone from the MGS team would do a HiBlog type effort ![]() Doug |
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#45
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2504 Joined: 13-September 05 Member No.: 497 ![]() |
I wish someone from the MGS team would do a HiBlog type effort ![]() So which did you want, good outreach or a HiBlog type effort? ![]() Seriously, if somebody was blogging instead of working on recovering the spacecraft, I'd fire their ass. You're doing just about as good a job with the radiation log as I could; I hope they don't yank it off the web. I am not empowered to discuss spacecraft operations publicly; inquiries have to be directed to JPL. MGS is either power-positive right now, in which case we will get it back eventually, or it's not, in which case it's dead and gone. Not much else to explain. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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