Jezero Delta Campaign, Sols 414-1000, 21 Apr 2022- 23 Dec 2023 Options

[tau]

Sol 464 Mastcam-Z
1. Left eye raw image
2. Left eye filters 1 to 6 multispectral principal components
Judging by the multispectral false colors, the conglomerate in the upper halfth of the image consists of a variety of different rock types an minerals.

[tau]

Sol 464 SuperCam Remote Micro-Imager mosaic with Mastcam-Z context

[HSchirmer]

Judging by the multispectral false colors, the conglomerate in the upper half of the image consists of a variety of different rock types and minerals.

Nice to be able to sample the rocks from an entire watershed, not just one site...

[tau]

Sol 466 SuperCam Remote Micro-Imager mosaic with three laser holes (no context image available yet).
The SuperCam mosaic reminds me of veins of fibrous gypsum in claystone (see second photo) that I found just a few days ago on a small Gipskeuper formation hill in Thuringia.
It would be a nice coincidence if also Perseverance had found a vein of fibrous gypsum.

[charborob]

Interesting rock formations seen on sol 466:

[dburt]

Virtually all the white Mars veins and veinlets probably consist of Ca-sulfates, but daily and seasonal temperature and humidity variations can cause apparent amorphization of surface sulfates (Ca-sulfates cycle among gypsum and the less hydrous forms bassanite and anhydrite). Therefore, nice fibrous gypsum crystals are unlikely at the surface. You might find them if you could dig.
dburt

[neo56]

Mastcam-Z Left mosaic made of 123 pictures taken on sol 466 (12 June, 2022) at 12:20 LMST.
Also on Gigapan.

[PaulH51]

Looking suspiciously like a piece of EDL Hardware (FOD)
Sol 467 - L-MastCam-Z (full zoom)

[neo56]

Indeed, it really looks like a piece of multi-layer insulation. See this picture in the JPL shield shop from https://www.nasa.gov/image-feature/jpl/meet...raft-dressmaker

[tau]

Sol 467 Mastcam-Z left eye filter 0 (RGB) color-enhanced image and anaglyph



Edit Deleted size and distance values, have to check my calculations.
Does anybody know the exact distance between neighboring pinholes in the thermal blanket material?

Second edit Here are the results (without guarranty) of stereophotogrammetry again:
The distance from Mastcam-Z to the thermal blanket material is about 10.4 meter. The size of the visible part is about 21 cm.
The distance between neighboring small holes in the material is about 1.25 cm (about half an inch).

[tau]

But much more interesting than the lost EDL hardware parts are the Martian rocks in a sol 467 Mastcam-Z image,
especially the one with the textured surface in the upper right part of the image.
Is the texture an effect of wind abrasion, or reflects it an internal property of the rock, or both?
Distance to the rock about 4.4 m, size about 2.6 cm (calculation results as usual without guarranty).

[neo56]

Just to share my calculations regarding the piece of (likely) thermal material that has been imaged: located at ~10.5m, it's 18cm x 10 cm.
Assuming a wind speed of 15 m/s (maximum measured by MEDA as far as I know), with a drag coefficient of 1.05 (cubic section, that's the closer I found), I compute a drag force of 0.044 N.
If the material is composed of Mylar (volumic mass = 1.38 g/cm^3), a layer of 6 µm has a weight of 0.00057 N.
So this drag force could lift a material composed of about 76 layers of Mylar.
Hence, it seems plausible that wind alone moved that thermal material.

[tau]

Merci beaucoup, Thomas, for your calculations.
The difference between our independently determined distances to the object is about one percent, which is a very good agreement and dispels my doubts about my results.
The size of 21 cm I calculated is the largest diagonal of the piece, respectively the smallest diameter of a circle that contains the piece completely.

[PaulH51]

Sol 466 SuperCam Remote Micro-Imager mosaic with three laser holes (no context image available yet)....

Did we get a context image of this target yet, just wondering of it's in the RA Workspace to try and get an idea of scale

[Cherurbino]

Does anybody know the exact distance between neighboring pinholes in the thermal blanket material?
out 1.25 cm (about half an inch).

See the Red Book of Sheldahl, p. 15 and further on

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