Marathon Valley, Sol 4078-4481 (July 15, 2015 - September 1, 2016) Options

[James Sorenson]

My version of the Sol 4140-4141 Mosaic.

[Explorer1]

Fantastic work James! Awe-inspiring....

[James Sorenson]

Thank you.

Sol 4098-4122

[vikingmars]

Thank you. Sol 4098-4122

How NICE James !
Thanks so much for sharing this nice work with us

[charborob]

Opportunity moved on sol 4200. Notice the shadow of the rim on the crater floor on this image.

[Phil Stooke]

Yes! I don't remember seeing a shadow before. Maybe there have been images which I just overlooked.

Phil

[fredk]

There was sol 2847 with some lovely views such as this one, which shows an "opposition surge" at the anti-solar point:
http://mars.nasa.gov/mer/gallery/all/1/p/2...43P2445L2M1.JPG
There were some lovely colour mosaics made, see the old thread starting around here.

I agree the new 4200 navcams are stunning. And I suspect we can see the opposition surge again in this frame:
http://mars.nasa.gov/mer/gallery/all/1/n/4...OZP1685R0M1.JPG
though someone should check the azimuths.

[atomoid]

i really liked the ones in shadow from sol4200 but sol4201 are even better. ICE chokes horribly on the righthand R image for some reason, so here's anaglyph of the other two pairs

"opposition surge", so thats what its called, thanks.. i've noticed this interesting effect quite a bit carpooling when one can actually get a chance to stare at at landscapes on low-angle sunny mornings, its especially apparent in iceplant type vegetation, i thought the effect aside from shadow hiding was just a prismatic reflection in plant epidermal cells but perhaps thats implicit as an aspect of the wiki's very brief coherent backscatter explanation.

[jamescanvin]

Speaking of shadows, note the one on the left here.

http://www.midnightplanets.com/web/MERB/im...ZP1211L0M1.html

[Astro0]

A little gif of the scene change at Marathon Valley as the shadows creep.

[scalbers]

"opposition surge", so thats what its called, thanks..

Also called heiligenschein when seen at a close distance.

[TheAnt]

i've noticed this interesting effect quite a bit carpooling when one can actually get a chance to stare at at landscapes on low-angle sunny mornings, its especially apparent in iceplant type vegetation, i thought the effect aside from shadow hiding was just a prismatic reflection in plant epidermal cells but perhaps thats implicit as an aspect of the wiki's very brief coherent backscatter explanation.

You're close, it's water drops or if chilly, could be ice crystals rather on the surface of the blades of same vegetation.

A a german word, but yes it sound right "Heiligenschein" though I rather think of holy or saintly light, also that ring over the head in religious depictions.

[charborob]

Sol 4209 pancam anaglyph:

Notice the dark streaks in the left center of the image. They were also visible on this image, taken on sol 4201. I wouldn't stick out my neck too much, but visually, they bear some similarity to RSLs (recurring slope lineae).

[wildespace]

Notice the dark streaks in the left center of the image. They were also visible on this image, taken on sol 4201. I wouldn't stick out my neck too much, but visually, they bear some similarity to RSLs (recurring slope lineae).

We've seen such streaks in many MSL photos. I'm more inclined to think that they are miniature "landslides" of the darker martian sand that sits underneath the lighter reddish coating of iron oxide dust.

[charborob]

wildespace, it is very obvious, in your image, that the streak results from a "mini-landslide" of fine-grained material. On the other hand, in the Opportunity image, the streak seems to originate from the rock. There doesn't seem to be a source of fine-grained material nearby to account for it (not obvious to me, anyway). I hope we will get a closer look soon.