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Dust Storm- Opportunity EOM, the end of the beginning of a new era in robotic spaceflight
djellison
post Jun 5 2018, 03:05 PM
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Expect a quiet few sols - http://www.lpl.arizona.edu/~lemmon/mars-tau-b.html
SOL TAU
5097 0.65
5098 0.64
5099 0.67
5100 0.64
5101 0.60
5102 0.60
5103 0.61
5104 1.55
5105 ****
5106 2.12

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djellison
post Jun 10 2018, 09:34 PM
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Moreover - it's not dust 'fall' that hits the arrays - it's just blowing around and sometimes you get some. Tilting at a large angle may actually put your arrays facing upwind and cause more harm than good.
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Dalhousie
post Jun 10 2018, 11:01 PM
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QUOTE (djellison @ Jun 10 2018, 09:34 PM) *
Moreover - it's not dust 'fall' that hits the arrays - it's just blowing around and sometimes you get some. Tilting at a large angle may actually put your arrays facing upwind and cause more harm than good.


Dust collects on upwind slopes, not downwind.
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djellison
post Jun 11 2018, 12:43 AM
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QUOTE (Dalhousie @ Jun 10 2018, 04:01 PM) *
Dust collects on upwind slopes, not downwind.


That's a rather simplified view of what really occurs

Papers like this : https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.1272 : go into it in more detail.

Moreover - the rover itself presents a topographic feature to the oncoming wind, whatever angle it comes from.
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Posts in this topic
- djellison   Dust Storm- Opportunity EOM   Jun 5 2018, 03:05 PM
- - nprev   Breaking news: As Mars nears one of its closest pe...   Jun 9 2018, 06:38 AM
- - Sean   Oh god.   Jun 9 2018, 11:17 AM
- - fredk   Some details of the storm activity at the MRO MARC...   Jun 9 2018, 02:17 PM
- - James Sorenson   Good luck to Opportunity and to the very talented ...   Jun 9 2018, 06:44 PM
- - Explorer1   Given the length of the mission, it was only a mat...   Jun 9 2018, 07:18 PM
- - marsophile   Once the dust storm per se abates, there may be a ...   Jun 10 2018, 12:46 AM
- - Phil Stooke   "I wonder if there might be some advantage at...   Jun 10 2018, 08:21 PM
- - djellison   When you have skies this dusty - the single best s...   Jun 10 2018, 09:03 PM
- - centsworth_II   Also, with panels flat, a gust of wind from any d...   Jun 10 2018, 09:21 PM
- - djellison   Moreover - it's not dust 'fall' that h...   Jun 10 2018, 09:34 PM
|- - Dalhousie   QUOTE (djellison @ Jun 10 2018, 09:34 PM)...   Jun 10 2018, 11:01 PM
|- - djellison   QUOTE (Dalhousie @ Jun 10 2018, 04:01 PM)...   Jun 11 2018, 12:43 AM
- - pioneer   Will Opportunity get a chance to send back images ...   Jun 10 2018, 10:07 PM
- - djellison   Other than taking occasional tau measurements of t...   Jun 10 2018, 10:13 PM
- - ngunn   I wonder how much tilt you need to shake some dust...   Jun 10 2018, 10:29 PM
- - djellison   The sort of slope that represents a threat to vehi...   Jun 10 2018, 10:38 PM
- - ngunn   Sure, my question was not about managing the situa...   Jun 10 2018, 11:11 PM
|- - djellison   QUOTE (ngunn @ Jun 10 2018, 03:11 PM) If ...   Jun 11 2018, 12:30 AM
|- - RoverDriver   QUOTE (ngunn @ Jun 10 2018, 04:11 PM) ......   Jun 13 2018, 04:21 PM
- - marsophile   Is it still true that the prevailing wind is upslo...   Jun 10 2018, 11:38 PM
- - pioneer   Thanks. I thought I saw an image taken by one of ...   Jun 11 2018, 12:55 AM
- - James Sorenson   Oppy as well as Spirit did take some images of the...   Jun 11 2018, 01:15 AM
- - serpens   Yep. Spirit provided a sequence of images that p...   Jun 11 2018, 03:49 AM
- - djellison   This mosaic is from Opportunity https://www.nasa.g...   Jun 11 2018, 04:23 AM
|- - serpens   QUOTE (djellison @ Jun 11 2018, 04:23 AM)...   Jun 11 2018, 12:15 PM
- - James Sorenson   I am curious if the full frame wide range tau imag...   Jun 11 2018, 04:36 AM
- - Deimos   Hoping to see some new values added to that site s...   Jun 11 2018, 11:49 AM
- - Deimos   I suppose since the news is here, it is on the plo...   Jun 11 2018, 07:32 PM
|- - fredk   QUOTE (Deimos @ Jun 11 2018, 08:32 PM) A ...   Jun 11 2018, 07:47 PM
|- - MoreInput   I just can't believe how fast the tau increase...   Jun 11 2018, 07:49 PM
- - mcaplinger   Has Opportunity ever been in a low-power fault sta...   Jun 11 2018, 09:52 PM
- - serpens   I guess Opportunity would be better placed to come...   Jun 11 2018, 11:28 PM
|- - mcaplinger   QUOTE (serpens @ Jun 11 2018, 03:28 PM) I...   Jun 12 2018, 05:47 AM
- - marsophile   https://mars.nasa.gov/mer/newsroom/pressrel.../200...   Jun 12 2018, 12:33 AM
- - Hungry4info   It's apparently not as bad over Curiosity...   Jun 12 2018, 04:11 AM
|- - MahFL   QUOTE (Hungry4info @ Jun 12 2018, 04:11 A...   Jun 12 2018, 10:39 PM
- - PaulH51   NASA will host a media teleconference at 10:30 a.m...   Jun 12 2018, 09:36 PM
|- - HSchirmer   QUOTE (PaulH51 @ Jun 12 2018, 10:36 PM) N...   Jun 12 2018, 10:09 PM
- - xflare   Has there been any further communication from Oppo...   Jun 12 2018, 11:32 PM
|- - mcaplinger   QUOTE (xflare @ Jun 12 2018, 03:32 PM) Ha...   Jun 13 2018, 12:50 AM
- - RoverDriver   There will be a telecon tomorrow (Wednesday June 1...   Jun 13 2018, 12:46 AM
- - jccwrt   The JPL news story on the dust storm was updated t...   Jun 13 2018, 03:05 AM
|- - mcaplinger   QUOTE (jccwrt @ Jun 12 2018, 07:05 PM) th...   Jun 13 2018, 03:45 AM
- - serpens   Thanks for that link. I guess all that can be don...   Jun 13 2018, 04:15 AM
- - SpaceListener   Are the solar panels able to raise up? I say this ...   Jun 13 2018, 04:31 PM
|- - MahFL   QUOTE (SpaceListener @ Jun 13 2018, 05:31...   Jun 13 2018, 10:48 PM
- - Explorer1   No, those were a one-time use, though good thinki...   Jun 13 2018, 04:35 PM
- - djellison   People should think of their TV screen. It has d...   Jun 13 2018, 05:52 PM
- - Art Martin   The news conference was upbeat. They expect the r...   Jun 13 2018, 06:22 PM
- - mcaplinger   The good news from the press conference is that th...   Jun 13 2018, 11:24 PM
|- - marsophile   QUOTE (mcaplinger @ Jun 13 2018, 03:24 PM...   Jun 14 2018, 03:17 AM
- - PaulH51   ICYMI : Here is a link to the YouTube recording of...   Jun 14 2018, 12:35 AM
- - serpens   The extent of this dust storm seems to be emulatin...   Jun 14 2018, 02:13 AM
- - jccwrt   Another potential alternative is the 1977 dust sto...   Jun 14 2018, 02:55 AM
- - elakdawalla   Because a lot of questions being asked here were a...   Jun 14 2018, 03:27 AM
|- - mcaplinger   QUOTE (elakdawalla @ Jun 13 2018, 07:27 P...   Jun 14 2018, 04:09 AM
|- - elakdawalla   QUOTE (mcaplinger @ Jun 13 2018, 09:09 PM...   Jun 14 2018, 04:36 PM
- - Explorer1   The main thought I keeping coming back to is that ...   Jun 14 2018, 04:33 AM
|- - mcaplinger   QUOTE (Explorer1 @ Jun 13 2018, 08:33 PM)...   Jun 14 2018, 03:11 PM
|- - Gerald   QUOTE (mcaplinger @ Jun 14 2018, 05:11 PM...   Jun 14 2018, 05:30 PM
- - mcaplinger   https://trs.jpl.nasa.gov/handle/2014/43244 "T...   Jun 14 2018, 03:05 PM
- - Deimos   Not strictly true, at least if you're referrin...   Jun 14 2018, 05:59 PM
- - marsophile   New MARCI weather report: http://www.msss.com/mss...   Jun 14 2018, 08:02 PM
- - Steve G   To add a layman's context to the amount of sun...   Jun 15 2018, 03:19 AM
- - serpens   There are a lot of variables to consider there Ste...   Jun 15 2018, 06:38 AM
- - Don1   OK, so according to the source linked below, a sun...   Jun 15 2018, 09:02 AM
- - Gerald   If I understand it correctly, tau measurements are...   Jun 15 2018, 12:03 PM
- - Deimos   Exactly! The Sun itself was fainter than a ful...   Jun 15 2018, 01:46 PM
|- - mcaplinger   QUOTE (Deimos @ Jun 15 2018, 05:46 AM) So...   Jun 15 2018, 02:26 PM
|- - fredk   QUOTE (Deimos @ Jun 15 2018, 02:46 PM) Th...   Jun 15 2018, 04:37 PM
- - hendric   On the 22 WH just to keep the clock alive, maybe t...   Jun 15 2018, 07:19 PM
|- - mcaplinger   QUOTE (hendric @ Jun 15 2018, 11:19 AM) O...   Jun 15 2018, 10:26 PM
||- - hendric   QUOTE (mcaplinger @ Jun 15 2018, 05:26 PM...   Jun 17 2018, 02:31 PM
||- - mcaplinger   QUOTE (hendric @ Jun 17 2018, 06:31 AM) w...   Jun 17 2018, 03:36 PM
|- - marsophile   QUOTE (hendric @ Jun 15 2018, 11:19 AM) O...   Jun 16 2018, 02:58 AM
|- - mcaplinger   QUOTE (marsophile @ Jun 15 2018, 06:58 PM...   Jun 16 2018, 04:01 PM
- - Roby72   just as a reminder how Mars looked in 2001 fully i...   Jun 15 2018, 09:56 PM
- - siravan   Regarding tau and the efficiency of solar panels, ...   Jun 15 2018, 10:10 PM
- - serpens   As siravan noted the spectrum at the surface would...   Jun 16 2018, 01:13 AM
|- - Deimos   QUOTE (serpens @ Jun 16 2018, 01:13 AM) T...   Jun 16 2018, 01:30 PM
|- - fredk   QUOTE (Deimos @ Jun 16 2018, 02:30 PM) If...   Jun 16 2018, 11:30 PM
- - Don1   I did try to estimate the illumination based on th...   Jun 16 2018, 09:20 PM
|- - mcaplinger   QUOTE (Don1 @ Jun 16 2018, 01:20 PM) What...   Jun 16 2018, 11:38 PM
|- - MahFL   QUOTE (mcaplinger @ Jun 16 2018, 11:38 PM...   Jun 17 2018, 08:44 AM
|- - mcaplinger   QUOTE (MahFL @ Jun 17 2018, 12:44 AM) The...   Jun 17 2018, 02:21 PM
- - Don1   QUOTE (mcaplinger @ Jun 16 2018, 04:38 PM...   Jun 17 2018, 09:05 AM
- - serpens   While the GaInP top cell is the limiting (short ci...   Jun 17 2018, 12:48 PM
- - fredk   I guess the question is: how does the rover decide...   Jun 17 2018, 02:34 PM
|- - mcaplinger   QUOTE (fredk @ Jun 17 2018, 06:34 AM) Mor...   Jun 17 2018, 03:41 PM
||- - marsophile   QUOTE (mcaplinger @ Jun 17 2018, 07:41 AM...   Jun 17 2018, 06:57 PM
||- - mcaplinger   QUOTE (marsophile @ Jun 17 2018, 10:57 AM...   Jun 18 2018, 12:11 AM
|- - djellison   QUOTE (fredk @ Jun 17 2018, 06:34 AM) I g...   Jun 17 2018, 11:42 PM
- - scalbers   How severe is this dust storm compared with others...   Jun 17 2018, 07:55 PM
|- - mcaplinger   QUOTE (scalbers @ Jun 17 2018, 11:55 AM) ...   Jun 17 2018, 08:11 PM
|- - serpens   QUOTE (scalbers @ Jun 17 2018, 08:55 PM) ...   Jun 18 2018, 12:19 AM
- - fredk   From the latest MRO weather report: QUOTE By the e...   Jun 20 2018, 05:35 PM
- - mcaplinger   http://www.planetary.org/explore/space-top...mer-u...   Jun 20 2018, 09:57 PM
- - djellison   "The Martian dust storm has grown in size and...   Jun 20 2018, 10:31 PM
- - JRehling   Christopher Go is the ace of [superior planet] ast...   Jun 21 2018, 03:29 AM
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