Atop/Around the Greenheugh Pediment, Site 79-, sol 2695-3199, 3 Mar 2020-6 Aug 2021 Options

[serpens]

I can see why they termed it nodular.

[PaulH51]

10 frame RMI mosaic across “Grimbister” on sol 2761
Roughly assembled in MS-ICE

[PaulH51]

Sol 2772: ChemCam-RMI mosaic of what looks like a complex (multi event?) erosion resistant mineral filled fracture
Image Credit: NASA/JPL-Caltech/LANL

[Ant103]

Hey, could you help me ?

On Sol 2767, Curiosity took a very odd image. I've just unbayer it, so we can see that it was taken under blue filter. Given the time at this location, it was during the night.



An other pic, cropped and a bit cleaned up.



Problem is, I don't have any clue of what is that object. Could be Phobos, but after a simulation in Stellarium, this moon was just setting. And Deimos is too small to be picture with such resolution. But maybe Stellarium wasn't very accurate about the exact location of Phobos in the sky. So, I don't know…

[Deimos]

That looks like a mid-morning image [*] through the solar filter taken as part of a dark current measurement. I'd expect the image aim to be at nearby ground. It would be a very long exposure--typically they are a set of 0-sec, short, and long exposures. The solar filter transmits ~0.001% of incident light, but the one in M-100 has a couple scratches or pinhole defects that let light into the system. And yes, the artifacts are blue because the M-100 solar filter is paired with a 440-nm, narrow-band filter.

The artifacts have been around since the start of the mission. Sun images are designed to miss them--at least they are conveniently off-center. See also: Bell et al 2017 (https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016EA000219) section 4.2.7 (pinhole) and 4.2.1 (dark measurements).

* I see just after midnight UTC, which is a bit before 9 AM that sol.

[fredk]

Yeah, we don't have the LMST publicly yet for that image (without calculating it ourselves of course), but it was taken at around 0:29 UT, which is only a few minutes before this image was taken, which is clearly daytime:

[Ant103]

Thank you both for your answers

It explains… A LOT actually. I suspected something like this but I was like "Come on ! A hole in a solar filter ? Makes no sense !". I was wrong…

As for my Stellarium simulation, I don't understand where I made a mistake. I input the correct location, the correct time, and this gave me nighttime. Not daytime. I should dig deeper to find where I made a mistake…

But again, thank you

[Phil Stooke]

A bit quiet lately as Curiosity digests its Glasgow lunch. This shows where and when a few events happened:



I should point out that my 'sample dumps' include the sprinkling of small amounts of material as well as the bigger dump on the last sol.

Now it's time to get moving again.

Phil

[neo56]

Back to the RMI observations of Gediz Vallis Ridge: I eventually finished stitching together several RMI sets and colorized them with MC Right pictures. More mosaics to come!

[PaulH51]

Drive on Sol 2780: Partial pan (L-NavCam), roughly assembled in MS-ICE

[Phil Stooke]

This is Paul's partial panorama reprojected - this is what gave me the position on the map which should be pretty good. Today, sol 2781, we drove again.

Phil

[PaulH51]

Another drive, this time on Sol 2781: Partial pan (L-NavCam), roughly assembled in MS-ICE.
Some exposure issues caused by lighting, but it may help Phil get a position until someone can stitch it properly

[Phil Stooke]

Thanks, Paul - I threw in an extra image. Here is a circular version. We moved about 50 m east.

Phil

[jvandriel]

The Navcam L view on Sol 2781.

Jan van Driel

[jvandriel]

The Navcam L-R view on Sol 2781.
Added 3 images taken with the Right Navcam.

Jan van Driel