Oooooooo, Dan’s still around

'tis me

Saying goodbye to Ingenuity, on the way to Van Zyl Overlook.

A circular projection of the sol 47 Navcam panorama.
Phil
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If you look closely at the dust in the GIF, we can see that some of the dust moves between frames, so I think you are right and much of that dust will likely be ejected when they run the blades at 2400 RPM

https://bit.ly/PercyMAP was updated to include the latest drives and a little help feature to show mouse navigation options.

This is the sol 48 panorama in circular form.
Phil
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Sol 48 Mascam-Z left:
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This is the sol 48 panorama which I reprojected into my circular view. I have not been posting these because mine are not very good (seams are fudged, and resolution is reduced by my procedure which is an ad hoc Photoshop job). I keep hoping someone else will produce better panoramas from the post-drive Navcams. I modified the color of the circular view because I didn't like the yellow appearance of the earlier ones. I cut the rover out of overlap areas to maximize surface coverage so your favorite bit might be missing.
Phil
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Here is the Sol-47 and Sol-48 Panorama's that I've made, Phil. I have a good workflow for these Navcam panorama's now I think.

Sol-47


Sol-47 Polar


Sol-48


Sol-48 Polar

Congratulations, James for this nice work of yours

Excellent!
Meanwhile, sol 49 - we just have a few frames down but the hazcams are enough to give a reliable location. Here is an ad hoc circular projection of them.

Phil
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And a circular projection of a full Navcam panorama for sol 49.
Phil
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Updated links from the recent waypoints on https://bit.ly/PercyMAP but

https://mars.nasa.gov/mmgis-maps/M20/Layers...0_traverse.json

is currently not showing the correct fromRMC and toRMC properties which causes the rover to drive somewhat erratically on the page. The json had changes in its structure before. So I am going to wait a few days before I make changes to the page logic hoping that the json gets fixed. I could use the waypoints json to determine to traverse segment order but it would complicate the logic.

The panorama of sol 48 standard version


and anaglyph

The Sol-49 Navcam panorama.



Polar

Your anaglyph looks really strange.
Here is my try:
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Sol 49 Navcam Right Panorama. Not quite as clean as James's, especially in near field, but perhaps useful in some way. [I kept reported Az/El unchanged and image is 3600 px for 360 deg, with 0 deg centered].
Click to view attachment
(edited: image v2, minor correction)

Thanks, James and Greenish, for your nice panoramas. I couldn't resist making circular versions of a couple of James's, for sols 48 and 49.
Phil
48: Click to view attachment
49: Click to view attachment

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Here is my version of sol 49's left navcam. Turns out images stitch pretty well, but colors come out really wonky.
I will try to improve my pipeline in the future.

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Circular version.

It's been "flattened", ie the images have been sheared so that the bottom of the mosaic looks about as far away as the top. Individual rocks and ridges, though, appear in front of their immediate background.

My take on those delicate pictures. Sol 49.

Sol 52 'Arm Workspace' 6 overlapping L-MastCam-Z at 34mm, assembled in MS-ICE, cropped the black margins ton improve the stitching, no additional processing.
They seem to be mimicking the MSL workspace style
Would I be correct in assuming the scale would be similar to MSL L-Mastcam when using the camera 34mm?

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Lovely image, PaulH51.

When I blow it right up to highest magnfication, I see hundreds of little spherules at lower left.

They remind me of what Opportunity discovered in 2004, and were dubbed "blueberries" -- actually spherical hematite inclusions formed in water.

Anybody knows what the process for those darker spots are? They are all over the lighter-toned sand. They look like indentations or drop marks.

Click to view attachment

Fascinating tear drop shapes. Depending upon aligment, might they be made by ejecta from the landing rockets scouring?

Is that a dust devil ?

The MC and MCZ sensor sizes are the same, so the angular scales would be the same at 34mm. So if the distances to the subject are the same the physical size of features will be the same too.

Just a query: do certain faces on the various featured rocks (highlighted in orange) suggest erosional/impact processes?

John

Small pebbles/gravel/sand from the blast of the skycrane engines. The landing site is to the 'right' of this image so the teardrop shapes would strongly infer they came from that direction

I share your opinion Doug. Other examples of blasting pebbles are seen in sol 32 and 34 navcam images, as these ones :

https://mars.nasa.gov/mars2020-raw-images/p...2_07_195J02.png

https://mars.nasa.gov/mars2020-raw-images/p...4_13_195J01.png

Thanks MahFL, a very beautiful one IMHO, clearly evidenced without any image enhancement !

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Sol 52 Navcam Left partial panorama, dust devil visible.

Nice find.

Here's another (EDIT: or same?) (less well-defined) one, behind Ingenuity, but safely far away. Sol 52.
Click to view attachment

timestamps:-

Your GIF: 13:13:31
MahFL's : 14:35:33

So either a long lived DD or the conditions were good for DD generation

Nice dust devil spotted by kymani76, with vignetting and levels corrected and sky extended.

This is the binned 2x2 Navcam tile mosaic that was taken on Sol-52 that includes the dust devil in the distance. Okay...This took abit of time.



Link to Full resolution
https://www.flickr.com/photos/43581439@N08/...070591/sizes/o/

Hi, I wondered too. They seem to be due to little pebbles splashing on the sand, almost certainly. I don't know if they could still be the effects of the landing.
Here one of our de-bayer

[quote name='James Sorenson' date='Apr 14 2021, 10:31 AM' post='251611']
This is the binned 2x2 Navcam tile mosaic that was taken on Sol-52 that includes the dust devil in the distance. Okay...This took abit of time.

Gorgeous. Thanks!

This is James's panorama for sol 52 with the missing bit (only available at lower resolution) added by me and made into a circular projection.
Phil
Click to view attachment

Looking at a close-up of the structural properties of these rocks, there is a very sharp edge between most of them. This might suggest that the process of
fracturing (?) was very violent, if not recent (in geological terms); where we're looking at both the outer surface rock (red outlines) showing a more eroded,
smooth surface, and the rock's innards (blue outlines) showing multiple fracture-type effects.

I wouldn't know about the landing distance from this rock, but I assume that the above violent process resulting in the above fragments wasn't due to
Percy's engine blasts, but more due to temperature variation effects on rocks on Mars's surface over time.

John
PS. PaulH51's original image, below, has obviously been highly edited, so I know he won't mind in the interest of science (thanks Paul).

The sharp edges are probably an artefact as a result of wind erosion rather than fracturing. The clue is that they all have a similar orientation

Jezero Delta Sol 54 Mastcam Z with simulated Percy

Looking at the ground …

Another good example sol55 of the ventifacts previously mentioned with the sharp terminator and revealing the predominant wind direction, much like terrestrial examples.

I'm holding out hope we'll eventually come across more of the larger variety surreal ones since you'd think the process with billions of years practically uninterrupted would produce some crazy formations over that timescale, but the most extreme we've seen i recall are relatively small as seen by Curiosity at various points along the trek to Mt Sharp, or the eroded rocks imaged by Spirit at bottom of Husband Hill on the way to Home Plate. Wish i had links to those..

There is an example of a tiny one in eliBonora's image above if you zoom in just to the left of center.

Sol 57 LMastcam-Z panorama:
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sol57 animated gif of wide angle navcam left series, 100ms per frame, vs. ca. 14s per frame in reality.



crop of dd on top of delta (was there another one in a similar location earlier?):



short workflow:

use roverpics to filter for navcam selection, download list of urls, use wget -i urlFile to download images

use gimp to load all pngs in one step as layers (filenames with timestamps will lead to correct sorting).

optionally crop

use filters - animation - optimize for gif

use image - mode - indexed - 255 colors, dither

export as gif - as animation

[todo: figure out how to batch process all layers for contrast stretch]

The gmic plugin can apply filters to all layers. With gmic auto balance, 150ms per frame (100 x speed up):



with gmic color balance stretch

There's something happening at the right edge as well... I can't see well enough in the GIF to tell if there are in fact several dust devils, but that's my impression.

Phil

Sol 57 MZL

These wide-field horizon time lapses appear to be a standard change-detection sequence, signified by ncam005**, starting on sol 50 and repeated on 52, 56, and 57. Remarkably, there appears to be at least one dust devil in each sequence! I wrote a little thread about this, with some average-subtraction gifs to make some easier to spot. None of the dust devils are too spectacular on their own, but it's interesting that they're so prolific. Maybe not all that surprising given the abundance of DD tracks seen from orbit, many very large (estimated 50m wide) and very distinct. This place seems to breathe dust devils.