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Winter Quarters, at Low Ridge Haven
dot.dk
post Apr 15 2006, 11:14 PM
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I just looked at an image from when Spirit was on top of Husband Hill... How clean she was back then sad.gif

So I made this gif to show the current dust buildup



A breath of wind could be used indeed unsure.gif


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RNeuhaus
post Apr 16 2006, 01:44 AM
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QUOTE (dot.dk @ Apr 15 2006, 06:14 PM) *
A breath of wind could be used indeed unsure.gif

Good example, everybody knows that Spirit is dirtier in basin than on the top of Hill. She started to get dirtier during his transverse from El Dorado to HP.

Hence, I saw that the upper of hill (see me previous posts) where there will be more breeze (see more stones and tail marks of ripples behind any stones) and it will help to blow out the powder.

Rodolfo
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sattrackpro
post Apr 16 2006, 01:07 PM
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Hereís a Q&D pan from the 4/15/06 (Sol 811) pancam directory of exploratorium - a look toward Husband Hill and the edge of HP. Thereís an interesting spot in the tracks here (second image below) where it looks as if the right front wheel may have failed to rotate momentarily, a few meters before it failed completely. Maybe, maybe not... it could just be a patch of soft-dust-ridge the wheels went through, and it does have some cleat marks, however they arenít uniform.
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ElkGroveDan
post Apr 16 2006, 03:35 PM
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QUOTE (dot.dk @ Apr 15 2006, 03:14 PM) *

By the looks of the soil you are using images from different filters. I think it might be more accurate to use images taken though the same filter.


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dot.dk
post Apr 16 2006, 04:05 PM
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QUOTE (ElkGroveDan @ Apr 16 2006, 03:35 PM) *
By the looks of the soil you are using images from different filters. I think it might be more accurate to use images taken though the same filter.


It's two navcam images wink.gif
So no filter issues.


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ElkGroveDan
post Apr 16 2006, 04:17 PM
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QUOTE (dot.dk @ Apr 16 2006, 08:05 AM) *
It's two navcam images wink.gif
So no filter issues.

Dang! I've been taking photos since Viking, and I'd swear that first one was through a red filter.

Nonetheless, dusty it is!


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Ant103
post Apr 16 2006, 07:25 PM
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dd.gif dd.gif dd.gif Dusts Devils, Spirit Want You sad.gif sad.gif dd.gif dd.gif dd.gif


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djellison
post Apr 16 2006, 07:29 PM
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It's OK Bob - I'll take this one...

Dust Devils did not clean Spirit.

smile.gif

Doug
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Shaka
post Apr 16 2006, 07:45 PM
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You ought to consider programming a 'hot key' for this reply. wink.gif
But I seriously worry that we may be getting more and more anxious for ANY sort of wind event as the months wear on at Low Ridge. Dust strangulation would be a particularly agonizing way for Spirit to go.


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djellison
post Apr 16 2006, 08:10 PM
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Common missconceptions require frequent correction.

I can see how and why it started - but the relation between cleaning and dust devils is simply that summer has stronger winds, and the summer also has more DD's. The connection is also furthered by the fact that we were in a topographically adventagous place during the summer.

Doug
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Bob Shaw
post Apr 16 2006, 08:56 PM
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Doug:

For this, you don't need an FAQ list, but instead a FIA list.

That's Frequently Ignored Answers...

Bob Shaw


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jvandriel
post Apr 17 2006, 09:57 AM
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Here is the complete view from Low Ridge Haven.

Spirit looking back at Husband Hill and surrounding.

Taken on Sol 811 with the R1 pancam.

jvandriel
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sattrackpro
post Apr 17 2006, 12:44 PM
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In case you haven't seen it, a new rover update was posted on the marsrovers website HERE, dated the 14th. The 'news' is that the increase in power is, "50 to 60 watt-hours per sol" - which only "gives the rover enough energy for about one hour of daytime remote science."

Unfortunately that isn't much of an increase - but it at least allows some of the 'science' that many have longed to see.
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sattrackpro
post Apr 17 2006, 01:00 PM
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One more item from THIS LINK - we ~could~ be sitting virtually in one small area for 8 months... maybe - some of that determined by lowered driving ability. Here's part of the text.

"We have to use care choosing the type of terrain we drive over," Dr. Ashitey Trebi-Ollennu, a rover planner at NASA's Jet Propulsion Laboratory, Pasadena, Calif., said about the challenge of five-wheel driving. In tests at JPL, the team has been practicing a maneuver to gain additional tilt by perching the left-front wheel on a basketball-size rock.

Spending eight months or so at Low Ridge Haven will offer time for many long-duration studies that members of the science team have been considering since early in the mission, said Dr. Ray Arvidson of Washington University in St. Louis, deputy principal investigator. These include detailed mapping of rocks and soils; in-depth determination of rock and soil composition; monitoring of clouds and other atmospheric changes; watching for subtle surface changes due to winds; and learning properties of the shallow subsurface by tracking surface-temperature changes over a span of months.
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Bill Harris
post Apr 17 2006, 02:16 PM
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There is nothing wrong with Spirit being a sessile observer for a while. This will give us a chance to do a long-term observation of the aeolian processes that we've seen many signs of. Remember where Spirit was at Sol 90: between Bonneville and The Hills and very dusty. This trek has been miraculous.

In an ideal world, the right front wheel should have conked out while she was doing a survey on top of VonBraun, now that would be a heck of a view.

--Bill


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