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Crossing the Dunes at Murray Buttes, Sites 54-, Sols 1353-, May 28 2016-
PaulH51
post Yesterday, 07:44 AM
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Three new Photojournal Catalog pages have been issued that address possible mud cracks observed by Curiosity at 'Old Soaker' and 'Squid Cove'
PIA21261: Possible Mud Cracks Preserved in Martian Rock LINK
PIA21262: Mars Rover's Mastcam View of Possible Mud Cracks LINK
PIA21263: Possible Signs of Ancient Drying in Martian Rock LINK
Modest Previews Only, for full size use links above
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fredk
post Yesterday, 05:12 PM
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It's been very rare to see dust devils at Gale, but I think we had one on sol 1582. Flipping between two of the navcam pairs shows a faint verticalish streak in these gif animations:
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Subtracting the corresponding frames and stretching reveals the streaks better (these cover exactly the same parts of the frames as the gifs above):
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The DD moves left to right (crudely east to west), crossing from one frame pair to the other.

It also looks like there's a much more diffuse DD/gust on the right side of this difference frame:

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Phil Stooke
post Yesterday, 07:38 PM
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That is a great discovery, Fred - well done. I've been looking for DDs throughout the mission (but only sporadically). This is only the second one I know of, the first being a distant and very faint one on sol 41. Faint though these may be, they are much clearer and more convincing than the older one.

I did a bit of different processing of the same data (after seeing your post). Each image is a stretched difference image (bottom) and the stretched image superimposed on the landscape (top).

Phil

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jvandriel
post Yesterday, 07:58 PM
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The Navcam L view on Sol 1582.

Jan van Driel

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