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 |
Oct 19 2018, 01:51 AM
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#316
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Member Group: Members Posts: 507 Joined: 10-September 08 Member No.: 4338 |
In my many winters' experience with snow, and three recent experiences with forest fire ash, the deposition of a windborne, granular substance does not cover all surfaces equally. Maybe Oppy's solar panels accumulate half as much as nearby surface units, maybe twice as much. I don't know how we could know – unless and until Opportunity wakes up and sends us pictures. The law of averages: an interval around the mean carries the most probability mass. It is true we cannot know in any absolute sense but we can maybe get a likely estimate that could inform the recovery strategy going forward. With regard to CRISM on Winnemucca: http://www.planetary.org/explore/space-top...nce-valley.html QUOTE Instead, the scientists are examining Winnemucca with ground imagery, remote sensing, and an orbital mineralogical detector. I assumed the orbital mineralogical detector was CRISM. In any case, it can be imaged by HIRISE, and I think the bright backdrop might provide a convenient "canvas" for viewing the new dust deposit. |
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Oct 19 2018, 05:33 AM
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#317
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Member Group: Members Posts: 691 Joined: 21-December 07 From: Clatskanie, Oregon Member No.: 3988 |
unless and until Opportunity wakes up and sends us pictures. I think if that happens, a gust would have blown a vast majority of any fallout off of the panels since Oppy would have woken up and phoned home. We will never really know at leased for sure how much accumulation was really on them in that case or any case. Oppy did take a pancam color panorama in the weeks on up to the end of science ops. So if the rover does wake up and starts taking pics around the area, change detection could be interesting. Not sure if even that would give an accurate fallout estimate, since winds could have also cleared the area. |
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Oct 25 2018, 04:18 PM
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#318
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Member Group: Members Posts: 507 Joined: 10-September 08 Member No.: 4338 |
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Oct 30 2018, 08:17 AM
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#319
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Member Group: Members Posts: 470 Joined: 24-March 04 From: Finland Member No.: 63 |
QUOTE After a review of the progress of the listening campaign, NASA will continue its current strategy for attempting to make contact with the Opportunity rover for the foreseeable future. Winds could increase in the next few months at Opportunity's location on Mars, resulting in dust being blown off the rover's solar panels. The agency will reassess the situation in the January 2019 time frame. https://www.jpl.nasa.gov/news/news.php?feature=7227 Cheers to Nasa for continuing the effort! -------------------- Antti Kuosmanen
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Nov 4 2018, 05:50 PM
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#320
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Member Group: Members Posts: 507 Joined: 10-September 08 Member No.: 4338 |
Are false locks less likely when COMM sessions are scheduled on a dedicated antenna, rather than in an MSPA group?
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Nov 5 2018, 04:42 AM
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#321
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
There's no difference.
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Nov 13 2018, 12:17 AM
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#322
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Member Group: Members Posts: 507 Joined: 10-September 08 Member No.: 4338 |
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Nov 15 2018, 09:49 PM
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#323
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Member Group: Members Posts: 282 Joined: 18-June 04 Member No.: 84 |
Is this thread about to get busy?
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Nov 15 2018, 10:08 PM
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#324
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Member Group: Members Posts: 293 Joined: 22-September 08 From: Spain Member No.: 4350 |
There's a tweet from Chris G from NASASpaceflight about a 11b/s downlink, but there's been false alarms before from orbiter signals.
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Nov 15 2018, 10:58 PM
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#325
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Member Group: Members Posts: 507 Joined: 10-September 08 Member No.: 4338 |
Probably a misidentified lock, re-identified later as on Maven.
https://twitter.com/dsn_status/status/1063171515208945664 https://twitter.com/dsn_status/status/1063175195492601857 https://twitter.com/dsn_status/status/1063183283754844161 https://twitter.com/dsn_status/status/1063181601453031427 |
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Nov 15 2018, 11:13 PM
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#326
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
"Today http://eyes.nasa.gov/dsn/dsn.html showed what looked like a signal from @MarsRovers Opportunity. As much as we'd like to say this was an #OppyPhoneHome moment, further investigation shows these signals were not an Opportunity transmission."
https://twitter.com/NASAJPL/status/1063204394596937728 I'd also refer people back to this : http://www.unmannedspaceflight.com/index.p...st&p=241237 |
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Nov 19 2018, 01:16 AM
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#327
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Member Group: Members Posts: 507 Joined: 10-September 08 Member No.: 4338 |
I suspect the Insight spacecraft is close enough to Mars now for its signal to be confused with that of Opportunity. The frequency is not so different. It will be landing soon.
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Nov 19 2018, 04:24 AM
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#328
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
Not really....
From https://deepspace.jpl.nasa.gov/dsndocs/810-005/302/302C.pdf the half power beam width for Xband on the 70M antennas is 0.034 degrees Using Eyes on the Solar System - currently the InSight-Earth-Mars angle is around 0.56 degrees. It will drop to 0.1 degrees at about 30 hrs before landing, 0.034 degrees about 10 1/2 hrs before landing, |
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Dec 4 2018, 02:16 AM
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#329
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Member Group: Members Posts: 507 Joined: 10-September 08 Member No.: 4338 |
http://www.planetary.org/explore/space-top...son-begins.html
New MER Update from TPS. It mentions a new hirise image that however has not been released yet. Also a discussion of the MER extension proposal. Apparently there are certain commonalities between the Endeavour and Gale craters. |
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Dec 13 2018, 07:31 AM
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#330
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Member Group: Members Posts: 507 Joined: 10-September 08 Member No.: 4338 |
https://www.space.com/42691-mars-rover-oppo...-team-hope.html
QUOTE "Still holding onto a sliver of hope...."
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