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Extricating Spirit, Digging out from Troy
ChrisC
post Jan 30 2010, 03:33 AM
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QUOTE (dshaffer @ Jan 26 2010, 02:02 PM) *
thanks to all for the text updates - hope someone can make an mp3 available later?


I also couldn't listen live, but would like to catch up now. I've read the whole thread from the teleconference up to here. Does anyone have a pointer to an mp3 of the news conference?

I saw the mentions of the iPlayer feed, but as I understand it that was just a related interview.

Edit: downloading now, thanks dshaffer!
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ugordan
post Jan 30 2010, 11:42 AM
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Miles O' Brien has a short interview with Steve Squyres re/ Spirit on This Week In Space. The segment starts at around 01:30.


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dshaffer
post Jan 30 2010, 01:20 PM
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QUOTE (ChrisC @ Jan 29 2010, 10:33 PM) *
I also couldn't listen live, but would like to catch up now. I've read the whole thread from the teleconference up to here. Does anyone have a pointer to an mp3 of the news conference?

I saw the mentions of the iPlayer feed, but as I understand it that was just a related interview.


Last evening I stumbled across the mp3 here (top of the page):

http://www.nasa.gov/mission_pages/mer/news...el20100126.html


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alan
post Jan 30 2010, 09:27 PM
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@marsroverdriver pointed to a less depressing rewrite of the XKCD comic.
Attached Image
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ddeerrff
post Jan 30 2010, 10:20 PM
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Like that one *much* better.
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Hungry4info
post Jan 31 2010, 04:44 PM
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From http://forums.xkcd.com/viewtopic.php?f=7&a...7&start=240


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alan
post Jan 31 2010, 08:54 PM
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Pointy rock on left?
http://207.7.139.5/mars/spirit/forward_haz...Z8P1254R0M1.JPG

edit, oops that's to far to the left, never mind.

This post has been edited by alan: Jan 31 2010, 09:31 PM
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jamescanvin
post Jan 31 2010, 09:38 PM
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Looks like a good drive from a tilt perspective. smile.gif


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fredk
post Jan 31 2010, 10:23 PM
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Indeed, it does look like a big improvement in tilt. Based on how far the horizon rose/dropped in the front/rear hazcams, I estimate an improvement in tilt of about 2.5 degrees towards the north on sol 2161 compared with sol 2158. The LR wheel has risen up quite a bit again.

She made less distance on 2161 than on previous backwards drives. I suspect the problem might be the RF wheel being stopped by the rock immediately to its rear (south). That rock is not very big, but itself might be caught by other rocks invisible under the belly. I wonder if wiggling (steering left and right) the RF wheel might nudge the rock it's against to one side.
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NW71
post Jan 31 2010, 10:29 PM
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Fredk, should that lead to a boost of 12-15W powerwise?


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fredk
post Jan 31 2010, 10:53 PM
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Yes, according to the figure of 5-6Whrs per degree of tilt that Callas gave at the briefing. But the big question is did the tilt improve by 2.5 degrees. The hazcams produce a lot of distortion so I could be a fair bit off.
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Hungry4info
post Jan 31 2010, 11:43 PM
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Last couple of drives or so. The change in drive strategy is readily apparent.

(animation)
Attached thumbnail(s)
Attached Image
 


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NW71
post Feb 1 2010, 01:13 AM
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At first glance what strikes/surprises me is how the RF wheel appears to have started to dig in. I hope others can tell me if this is deliberate (If so, how?) or a reflection of possible change in the surface underneath the wheel?

I take it, based on earlier comments from Fredk and others, this is good news re tilt.

Neil
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alan
post Feb 1 2010, 01:14 AM
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The RF wheel is moving into soil that was broken up by the RM in its initial pass, could be a good place to dig the wheel in if that's the plan.
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fredk
post Feb 1 2010, 03:04 AM
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QUOTE (Hungry4info @ Feb 1 2010, 12:43 AM) *
The change in drive strategy is readily apparent.

The plan as they discussed at the briefing was to continue with backwards drives, and as far as I know no change in strategy has happened yet. They said they may try to wiggle the RF to dig it in, but there's no sign from the images that they've tried that yet. We'll just have to wait and see as always...
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