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Matijevic Hill detailed survey, Sol 3153 - 3290
mhoward
post Jan 14 2013, 08:50 PM
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Was poking around and just now noticed this: dust devil on sol 3182. (Center frame; vertical line is south).


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Stu
post Jan 14 2013, 09:12 PM
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Well spotted. smile.gif


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fredk
post Jan 14 2013, 09:28 PM
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Yeah, nice catch! That's only DD#2 for Oppy, IIRC.

Here's a stacked average of the L and R frames:
Attached Image

If anyone's skeptical, it appears in exactly the same spot in the L and R frames, but is completely absent from the neighbouring frames, taken less than a minute earlier:
http://marsrovers.jpl.nasa.gov/gallery/all...__P0675R0M1.JPG
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atomoid
post Jan 14 2013, 09:50 PM
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hmmm, yeah and If I Searched Correctly, there was only DD#1 in an old FredK post and gif animation from way back in 2010 SOL 2301 ...
also in the center left of ant103's pano
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mhoward
post Jan 14 2013, 10:08 PM
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Good point, Fred - right in the overlap area. Here's two frames if anyone wants to make a flicker animation - seems to be beyond my technical ability at the moment. (Disclaimer: contains my own inexact de-vignetting and brightness adjustment.)
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Phil Stooke
post Jan 14 2013, 10:35 PM
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Great observation!

Phil



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fredk
post Jan 14 2013, 11:36 PM
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QUOTE (mhoward @ Jan 14 2013, 10:08 PM) *
Here's two frames if anyone wants to make a flicker animation
Here you go:
Attached Image

And here's the difference, with DD minus without DD:
Attached Image

Heavy jpeg artifacts at this zoom and stretch, but in all cases I've averaged the L and R frames to boost S/N by sqrt(2).
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atomoid
post Jan 15 2013, 12:26 AM
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so are entering into dust devil season?
if the last sighting was SOL 2301 and now its SOL 3182 it looks like were at least a season ahead of the last cycle sighting, any seasonal pattern to this? lets see..
Last DD was seen about the middle between Mars summer solstice and autumnal equinox..
This one has Mars' winter solstice is coming up this Feb 23 2013.
if these two are just outliers i guess we have'nt been paying attention..
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dvandorn
post Jan 15 2013, 01:17 AM
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I'm not surprised we're seeing a DD here. The relative lack of them at Meridiani is, I think, due to the lack of pronounced hills and slopes in the area. DDs seem to spawn off of hills and out of very large craters. We have the kinds of slopes required to generate them at our current location, but haven't seen much in the way of hills up until now.

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walfy
post Jan 17 2013, 08:51 AM
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That dust devil was a treat!

Haven't done one of these for awhile, did my best taking out the headaches. Micro from Sol 3192:

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fredk
post Jan 17 2013, 04:11 PM
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Beautiful! I love those micro-buttes.
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Phil Stooke
post Jan 17 2013, 05:45 PM
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Yes, they're beauts.

Phil

MOD NOTE: In an unprecedented admin/mod team action, Phil will presently be executed for this...wink.gif


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dvandorn
post Jan 17 2013, 09:30 PM
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Groannnnnnnnnnnnnn.....

-the other Doug


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eoincampbell
post Jan 18 2013, 03:03 AM
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How Dajare You... smile.gif


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fredk
post Jan 18 2013, 05:20 AM
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More wind action at Endeavour - what looks like a gust well inside the crater on sol 3194, arrowed:
Attached Image

More changes are visible in the foreground, and very easy to see when you take the difference between the two frames:
Attached Image

The two frames are only a few minutes apart in local time, so the lighting is almost identical. The gust is not visible in the frames taken just after the 3194 frames:
http://qt.exploratorium.edu/mars/opportuni...0M1.JPG?sol3194
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