Dust Storm- Opportunity EOM, the end of the beginning of a new era in robotic spaceflight |
Dust Storm- Opportunity EOM, the end of the beginning of a new era in robotic spaceflight |
Jun 11 2018, 09:52 PM
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#31
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
Has Opportunity ever been in a low-power fault state? I'm thinking not.
As far as I know, Spirit went into this state on sol 2210 and never came out, although this is supposed to be recoverable. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Jun 11 2018, 11:28 PM
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#32
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Senior Member Group: Members Posts: 1057 Joined: 17-February 09 Member No.: 4605 |
I guess Opportunity would be better placed to come out of a low power fault state. Spirit had to try and survive the depths of winter. With the dust storm maximum temperatures will be cool but minimum temperatures will be higher than normal for this time of year and the radioisotope heaters may be able to cope.
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Jun 12 2018, 12:33 AM
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#33
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Member Group: Members Posts: 507 Joined: 10-September 08 Member No.: 4338 |
https://mars.nasa.gov/mer/newsroom/pressrel.../20040526a.html
Is it cold enough to require "Deep Sleep" mode to keep the "stuck-on" heater from wasting energy? (I guess we don't have to worry about the Mini-TES any more.) Does the loss of flash memory affect the hazard of a low-battery state? |
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Jun 12 2018, 04:11 AM
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#34
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Senior Member Group: Members Posts: 1452 Joined: 26-July 08 Member No.: 4270 |
It's apparently not as bad over Curiosity's landing site, but the air is noticeably dusty.
Sol 2077 MastCam. -------------------- -- Hungry4info (Sirius_Alpha)
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Jun 12 2018, 05:47 AM
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#35
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
I guess Opportunity would be better placed to come out of a low power fault state. Spirit had to try and survive the depths of winter. I'm not sure that the specific failure mode that got Spirit has ever really been identified. The presumption was that it was related to cold, but it would surprise me a little if there was anything about MER that could be rendered non-functional by a few deep thermal cycles. (Well, maybe the batteries, but the system would still work in the daytime.) Hopefully there isn't some inherent flaw in the low power fault state, or better yet, that it never gets entered. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Jun 12 2018, 09:36 PM
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#36
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Senior Member Group: Members Posts: 2431 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
NASA will host a media teleconference at 10:30 a.m. PDT (1:30 p.m. EDT) Wednesday, June 13, to discuss a massive Martian dust storm affecting operations of the agency's Opportunity rover and what scientists can learn from the various missions studying this unprecedented event. More at link:
https://www.jpl.nasa.gov/news/news.php?feature=7158 |
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Jun 12 2018, 10:09 PM
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#37
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Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
NASA will host a media teleconference at 10:30 a.m. PDT (1:30 p.m. EDT) Wednesday, June 13, to discuss a massive Martian dust storm... Now that we have equipment on Mars, should global dust storms get names like Earth hurricanes or typhoons? Guess the 2007 storm would be "Ashes" and this would be "Bowie"? |
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Jun 12 2018, 10:39 PM
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#38
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Forum Contributor Group: Members Posts: 1374 Joined: 8-February 04 From: North East Florida, USA. Member No.: 11 |
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Jun 12 2018, 11:32 PM
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#39
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Member Group: Members Posts: 282 Joined: 18-June 04 Member No.: 84 |
Has there been any further communication from Opportunity since Sunday morning?
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Jun 13 2018, 12:46 AM
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#40
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Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
There will be a telecon tomorrow (Wednesday June 13, 2018) at 10:30am PDT
https://www.jpl.nasa.gov/news/news.php?feature=7158 Paolo -------------------- Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
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Jun 13 2018, 12:50 AM
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#41
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
Has there been any further communication from Opportunity since Sunday morning? I don't know. I happened to notice a DSN track on DSN Now this morning but nothing was received while I was watching. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Jun 13 2018, 03:05 AM
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#42
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Member Group: Members Posts: 306 Joined: 4-October 14 Member No.: 7273 |
The JPL news story on the dust storm was updated this evening to say that the rover failed to check in today and is likely in low-power fault mode.
https://www.jpl.nasa.gov/news/news.php?feature=7155 |
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Jun 13 2018, 03:45 AM
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#43
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
the rover failed to check in today and is likely in low-power fault mode. Bummer. Per https://trs.jpl.nasa.gov/handle/2014/37750 (assuming there are no changes to the fault response), if it gets enough power to boot back up, comm is limited to one LGA DTE per day at 11 LST, unless the ops team can get commands in to alter this behavior and enable UHF comm. I'm sure this will all be described tomorrow. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Jun 13 2018, 04:15 AM
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#44
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Senior Member Group: Members Posts: 1057 Joined: 17-February 09 Member No.: 4605 |
Thanks for that link. I guess all that can be done now is sit back, cross all available fingers and hope that this amazing feat of engineering design can astound us one more time.
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Jun 13 2018, 04:21 PM
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#45
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Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
...the solar panels however they are supported must have some some natural vibration frequencies. If it were possible to drive those natural oscillations the amplitude might be enhanced to the point where more dust slides. On Si=ol 4311 we "drove" uphill at 32 degrees and excited the vehicle with quite large values of vibration and very little dust was moved. We tried on Spirit as well back on a slope (also at 30deg) before leaving the north side of Home Plate and there was no measurable effect on dust factor. I think one has to consider we are talking DUST, not sand. Paolo -------------------- Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
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