Winter Quarters, at Low Ridge Haven |
Winter Quarters, at Low Ridge Haven |
Apr 15 2006, 11:14 PM
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#16
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Member Group: Members Posts: 578 Joined: 5-November 04 From: Denmark Member No.: 107 |
I just looked at an image from when Spirit was on top of Husband Hill... How clean she was back then
So I made this gif to show the current dust buildup A breath of wind could be used indeed -------------------- "I want to make as many people as possible feel like they are part of this adventure. We are going to give everybody a sense of what exploring the surface of another world is really like"
- Steven Squyres |
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Apr 16 2006, 01:44 AM
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#17
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Senior Member Group: Members Posts: 1636 Joined: 9-May 05 From: Lima, Peru Member No.: 385 |
A breath of wind could be used indeed 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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Apr 16 2006, 01:07 PM
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#18
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Member Group: Members Posts: 136 Joined: 13-October 05 From: Malibu, CA Member No.: 527 |
Here’s 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. There’s 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 aren’t uniform.
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Apr 16 2006, 03:35 PM
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#19
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
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. -------------------- If Occam had heard my theory, things would be very different now.
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Apr 16 2006, 04:05 PM
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#20
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Member Group: Members Posts: 578 Joined: 5-November 04 From: Denmark Member No.: 107 |
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 So no filter issues. -------------------- "I want to make as many people as possible feel like they are part of this adventure. We are going to give everybody a sense of what exploring the surface of another world is really like"
- Steven Squyres |
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Apr 16 2006, 04:17 PM
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#21
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
It's two navcam images 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! -------------------- If Occam had heard my theory, things would be very different now.
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Apr 16 2006, 07:25 PM
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#22
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Senior Member Group: Members Posts: 1619 Joined: 12-February 06 From: Bergerac - FR Member No.: 678 |
Dusts Devils, Spirit Want You
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Apr 16 2006, 07:29 PM
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#23
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
It's OK Bob - I'll take this one...
Dust Devils did not clean Spirit. Doug |
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Apr 16 2006, 07:45 PM
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#24
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Senior Member Group: Members Posts: 1229 Joined: 24-December 05 From: The blue one in between the yellow and red ones. Member No.: 618 |
You ought to consider programming a 'hot key' for this reply.
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. -------------------- My Grandpa goes to Mars every day and all I get are these lousy T-shirts!
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Apr 16 2006, 08:10 PM
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#25
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
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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Apr 16 2006, 08:56 PM
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#26
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Senior Member Group: Members Posts: 2488 Joined: 17-April 05 From: Glasgow, Scotland, UK Member No.: 239 |
Doug:
For this, you don't need an FAQ list, but instead a FIA list. That's Frequently Ignored Answers... Bob Shaw -------------------- Remember: Time Flies like the wind - but Fruit Flies like bananas!
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Apr 17 2006, 09:57 AM
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#27
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Senior Member Group: Members Posts: 2842 Joined: 22-April 05 From: Ridderkerk, Netherlands Member No.: 353 |
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Apr 17 2006, 12:44 PM
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#28
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Member Group: Members Posts: 136 Joined: 13-October 05 From: Malibu, CA Member No.: 527 |
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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Apr 17 2006, 01:00 PM
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#29
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Member Group: Members Posts: 136 Joined: 13-October 05 From: Malibu, CA Member No.: 527 |
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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Apr 17 2006, 02:16 PM
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#30
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Senior Member Group: Members Posts: 3002 Joined: 30-October 04 Member No.: 105 |
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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