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The Top of Vera Rubin Ridge Part 1, Site 66-67, sol 1812-1943, 11 Sep 2017-23 Jan 2018
Phil Stooke
post Sep 23 2017, 12:48 PM
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Apparently we are now in a new quadrangle. Names from the latest status report include Sherwood Forest and Troll Valley, taken from the 1883 novel The Merry Adventures of Robin Hood by Howard Pyle. Previous quads took names from geological features of the areas which gave the quads their names. I don't know what this quad will be named. If anyone can fill us in, I would be grateful.

Phil


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PaulH51
post Sep 24 2017, 06:25 AM
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QUOTE (PaulH51 @ Sep 20 2017, 03:30 PM) *
Well I can't claim to have seen a reaction like that to a ChemCam LIBS session ohmy.gif)

I believe this may be one of the MAHLI's of the sol 1821 odd looking ChemCam target I posted a few days back. Rotated & cropped, in raw colour and presented side-by-side with the RMI. Looks like the liberal coating of dust and the darker bedrock gave us the interesting B&W image smile.gif
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serpens
post Sep 24 2017, 07:04 AM
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That does seem to be the target, good eyes there Paul. The RMI operating range is 400 nm to 840 nm so there was possibly a big spike in one section of the reflectance spectra.
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PaulH51
post Sep 25 2017, 03:34 AM
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QUOTE (serpens @ Sep 24 2017, 03:04 PM) *
...The RMI operating range is 400 nm to 840 nm so there was possibly a big spike in one section of the reflectance spectra.

Thanks for the tip on the camera's optical range and the possible spike smile.gif


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PaulH51
post Sep 25 2017, 10:51 AM
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I think this sol 1822 ChemCam target is Hypocrites Ledge, I added the R-MastCam context image as well as a small mosaic of R-NavCam images to the 4 frame RMI mosaic. AlgorimancerPG was used to create the scale bar.
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PaulH51
post Sep 27 2017, 04:47 AM
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Quick and Dirty R-NavCam after the short drive on 1827.
Page mods can delete when the good version is posted
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serpens
post Sep 27 2017, 05:09 AM
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Well the depositional environment is certainly changing as we get closer to the top of the ridge.
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monty python
post Sep 27 2017, 06:32 AM
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Almost looks like tree rings. Very uniform in thickness I think. Seasonal?
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jvandriel
post Sep 27 2017, 09:50 AM
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The Navcam L view on Sol 1827.

Jan van Driel

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Phil Stooke
post Sep 27 2017, 03:00 PM
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A circular view of Jan's new panorama. Soon enough - a month or two perhaps - and we will be looking into the stunning terrain south of the ridge.

Phil

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HSchirmer
post Sep 27 2017, 03:33 PM
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QUOTE (monty python @ Sep 27 2017, 07:32 AM) *
Almost looks like tree rings. Very uniform in thickness I think. Seasonal?

Well, perhaps not "seasonal' as in every martian year, but perhaps "recurrent" as in 51k earth year, procession.
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serpens
post Sep 28 2017, 03:54 AM
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There are a number of factors that could have influenced bedding formation that are not necessarily cyclical. For example changes in the sources of sediment and variations in sediment supply, water depth and velocity, changes in climate or local environment, wind velocity and direction if aeolian, airfall from volcanic activity or impacts and so on. There should be some interesting papers in the next LSPC.
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PaulH51
post Sep 28 2017, 08:47 AM
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R-MastCam from 1821 which is the context image for the ChemCam target called 'Mustards Island'. We can see the LIBS locations as bright specs which are very similar to earlier LIBS sites on iron meteorites, but I've not yet seen any reports from JPL, I guess we have to await a paper, or a Photo Journal post smile.gif
Using AlgorimancerPG I get a width of ~6 cm.
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jvandriel
post Sep 28 2017, 06:27 PM
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The Navcam L view on Sol 1828.

Jan van Driel

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djellison
post Sep 28 2017, 07:15 PM
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Yeah - that was a fun shift yesterday (1829) - did my best to raise the drive direction (ncam00267) to cover Mt Sharp without getting a hole in coverage between it, the Workspace (ncam00375) and the ChemCam targetable region (ncam00312) - a lot of back and forth, relying on an end of drive pitch/tilt to make it work.

Super relieved that it all worked out smile.gif
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