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Unmanned Spaceflight.com _ Opportunity _ Perseverance valley

Posted by: Julius Jul 4 2017, 05:11 AM

Time for another topic, me thinks.

Posted by: atomoid Jul 13 2017, 01:43 AM

figuring this "Perseverance Valley" thread should populate with said content...https://media.tenor.com/images/c314fb41103bbc10dcad0fd6e52fad0a/tenor.gif??

Here are some stereo views from http://www.midnightplanets.com/web/MERB/image/04786/1P553076526EFFCZZ0P2375L2M1.html images of presumably water-carved topography downslope of the spillway
(ICE didn't deal well with the contrast scope so at left is anaglyph of 3 pairs, crosseye of left portion, crosseye of right portion, at right is a parellel of most lumpy section).


Posted by: Floyd Jul 13 2017, 11:22 PM

The pancam images for the past several days show a ground texture that looks like it is cemented together and really interesting textures. Maybe some of the image wizards can put these images together for all to see. We won't be getting too much back for a while, but channel already looks very interesting.

Posted by: atomoid Jul 14 2017, 12:49 AM

nice to see MI images being taken again http://www.midnightplanets.com/web/MERB/image/04787/1F553164576EDNCZZ0P1121L0M1.html, these look set up to stitch for stereo pairs so heres the stitch and one of its sub-pairs in crosseye/anaglyph


Posted by: RoverDriver Jul 14 2017, 01:57 PM

QUOTE (Floyd @ Jul 13 2017, 03:22 PM) *
The pancam images for the past several days show a ground texture that looks like it is cemented together and really interesting textures. Maybe some of the image wizards can put these images together for all to see. We won't be getting too much back for a while, but channel already looks very interesting.


I'm not so sure about the terrain being cemented. The RHAZ show quite visible cleat marks indicating the soil can be compressed by the cleats. To my untrained eye, this looks more like gravel. Anyway, parking brake is set, we even turned the RF wheel a bit to keep things according to MDOT (Martian Department of Transportation) regulations. See yoou in a couple of weeks.

Paolo

Posted by: Floyd Jul 16 2017, 12:39 PM



OK Maybe not cemented, but some of these slabs look polished--almost like glacial polish. Does this look like polish by running water to any of you?

Posted by: PDP8E Jul 16 2017, 03:27 PM

Hi floyd,
we have seen what a couple of million years of low density Mar's wind can do to 'fluted' rocks.
I think the environment there is alien enough that we cant quite appreciate the processes
On Earth you be hard pressed to find a dozen 'craters' due to fast (compared to mars) erosion (rain, winds, quakes, tectonics, oceans)
These could be stream cobbles or wind eroded ...
I am waiting on Grotzinger .et al to weigh in.
But it sure is fascinating! Awesome image!

See you around town, fellow Bostonian!


Posted by: monty python Jul 17 2017, 05:37 AM

That surface does look a little different to my untrained eye. There is work to do here!

Posted by: atomoid Jul 17 2017, 09:55 PM

Perseverance Valley indeed seems to differ somewhat significantly in the bedrock and consistency of the soils, comparing relatively similar filter#2 views from http://www.midnightplanets.com/web/MERB/image/04122/1P494113565EFFCO03P2437R2M1.html with its more pillowy bedrock and angular shards versus the more pebbly and sheared surface seen here in http://www.midnightplanets.com/web/MERB/image/04791/1P553518604EFFCZZ0P2378R2M1.html.

That observation, at least in this very limited sampling, doesn't completely hold up when perusing a sampling of MI images at Marathon http://www.midnightplanets.com/web/MERB/image/04131/1M494925669EFFCO97P2975M2M1.html vs Perseverance http://www.midnightplanets.com/web/MERB/image/04787/1M553162964EFFCZZ0P2976M2M1.html, but still some interesting differences are apparent and despite the better focus and exposure of the more recently acquired MI, it seems like the muddier fines have been cleaned away here. I'm curious whether any of this owes to winds in each locale, inferring that here in Perseverance we might expect better solar panel cleaning events? since if seasonal patterns are consistent the images linked are just about 1 Mars year apart.

Posted by: marsophile Jul 18 2017, 03:45 AM



Different all right. Parallel-eye stereo.

Are there some berries on that grooved fragment? It's hard for me to tell.

Posted by: serpens Jul 19 2017, 02:39 AM

Different, but attractive.

 

Posted by: nprev Jul 19 2017, 05:14 AM

Different indeed.

I wonder if we're seeing the effects of a few tens or hundreds of millions of years of wind scouring on harder than usual bedrock.

Posted by: fredk Jul 19 2017, 04:31 PM

We're starting to see some clouds as we head towards winter. Here's an navcam animation from 4793:


This is a stretched difference of each frame from the average of the frames.

Posted by: jvandriel Jul 23 2017, 06:49 PM

The road ahead.

The Pancam L2 images taken between Sol 4785 and Sol 4793 stitched together.

Jan van Driel


Posted by: PDP8E Jul 24 2017, 04:42 AM

QUOTE (fredk @ Jul 19 2017, 12:31 PM) *
We're starting to see some clouds as we head towards winter. Here's an navcam animation from 4793:
This is a stretched difference of each frame from the average of the frames.

Hi Fred,
The originals have that bright 'half moon' in the lower third of the frames (which I think you chopped off)
What is that bright area?

Posted by: RoverDriver Jul 24 2017, 02:02 PM

QUOTE (PDP8E @ Jul 23 2017, 09:42 PM) *
Hi Fred,
The originals have that bright 'half moon' in the lower third of the frames (which I think you chopped off)
What is that bright area?


It is caused by the dust of times. ;-) The small hood we have in front optical element only partly occludes the Sun. Therefore, even when the Sun is outside the field of view it will illuminate the dust which causes diffusion and enters the optical path. Most of the dust was accumulated around Sol 1200+ (2007) but during the years the wide have cleaned up the front elements quite a bit.

Paolo

Posted by: marsophile Jul 30 2017, 02:07 AM

https://mars.nasa.gov/mer/mission/status.html#opportunity

Looks like Oppy has insisted on a two-week vacation during Solar Conjunction!

Posted by: fredk Aug 1 2017, 03:20 PM

Catching up on some night sky imaging from 4784. Here's a stack of three frames to increase the S/N by sqrt(3):


I don't recognize the field...

Posted by: Deimos Aug 1 2017, 04:22 PM

Taurus, just below pointy end of the Hyades. Kinda random. A rare night comm pass allowed free astronomy, but no moons were up. Still useful as practice and will add a night opacity datum..

Posted by: marsophile Aug 1 2017, 07:40 PM

http://www.planetary.org/explore/space-topics/space-missions/mer-updates/2017/07-mer-update-opportunity-enters-perseverance-valley.html

Monthly MER Update from the Planetary Society. Also has a nice star photo.

I'm wondering what all the proper motion streaks are, especially the sideways ones. Meteors in the Mars atmosphere?

Posted by: fredk Aug 1 2017, 08:08 PM

Thanks, Deimos.

Marsophile, the steaks directed from 11 o'clock to 5 o'clock are stars trailing during the exposure. Everything else should be cosmic ray hits.

Posted by: djellison Aug 2 2017, 05:38 PM

Here's the field as calculated by Astrometry.net
( http://nova.astrometry.net/user_images/1693971#annotated )



Posted by: marsophile Aug 5 2017, 04:14 AM

http://qt.exploratorium.edu/mars/opportunity/pancam/2017-08-04/1P555114370ESFCZZ0P2543L2M1.JPG

Near-perfect layering?

Posted by: Phil Stooke Aug 5 2017, 06:31 AM

My guess is that it's an erosional texture as seen in the MI images from the same sol.

Phil


Posted by: monty python Aug 9 2017, 05:55 AM

I guess, since oppy moved immediately after conjunction, the auto mode reset she had was no big deal.

Posted by: marsophile Aug 12 2017, 03:50 AM

http://qt.exploratorium.edu/mars/opportunity/navcam/2017-08-11/1N555729108EFFD000P1956L0M1.JPG

This image may provide some perspective on the channels and their relationship to the surrounding landscape.

Posted by: atomoid Aug 15 2017, 12:31 AM

http://www.midnightplanets.com/web/MERB/image/04809/1M555116136EFFCZZ0P2936M2M1.htmlMI stitch, with bonus anaglyph highlighting the obligatory ICE stitching artifacts.


Posted by: jvandriel Aug 16 2017, 01:33 PM

The Navcam L0 view on Sol 4816.

Jan van Driel


Posted by: jvandriel Aug 16 2017, 07:39 PM

Mi cam view taken on Sol 4809-4810.

Jan van Driel


Posted by: Phil Stooke Aug 16 2017, 10:53 PM

This is Jan's 4816 panorama reprojected into a roughly maplike geometry to give a view of the surroundings. The lower right (southeast) corner is still bad in this version. The tracks cross a small crater.

Phil


Posted by: jhagen Aug 17 2017, 06:27 PM

My take on the sol 4809 stereo mosaic.

Posted by: marsophile Aug 18 2017, 03:44 AM



Parallel-eye stereo.

Posted by: atomoid Aug 21 2017, 09:03 PM

pretty good view down the 'cascades' http://www.midnightplanets.com/web/MERB/sol/04825.html cross/anag


Posted by: PDP8E Aug 28 2017, 01:25 AM

Oppy is moving down into Perseverance Valley
Cant wait for the explanation about what we are looking at here....


Posted by: monty python Aug 28 2017, 05:52 AM

What a "groovy" picture.

Posted by: Phil Stooke Aug 28 2017, 07:07 PM

I concur. It IS groovy! Also it seems to contain some grooves. A stereo version will be particularly interesting.

Phil

Posted by: atomoid Aug 31 2017, 01:37 AM

a collection of sol4831 pancam crosseye/anaglyphs of http://www.midnightplanets.com/web/MERB/image/04831/1P557073320EFFD048P2397R2M1.html, the http://www.midnightplanets.com/web/MERB/image/04831/1N557073014EFFD048P1814R0M1.html, plus a http://www.midnightplanets.com/web/MERB/image/04831/1P557070181EFFD000P2396L2M1.html of that from the previous http://www.midnightplanets.com/web/MERB/site/2080000.html.



Posted by: atomoid Sep 7 2017, 08:55 PM

downslope stereo view for http://www.midnightplanets.com/web/MERB/image/04841/1P557961954EFFD0AKP2399L2M1.html


Posted by: atomoid Sep 8 2017, 11:04 PM

lengthly september edition of the http://www.planetary.org/explore/space-topics/space-missions/mer-updates/2017/08-mer-update-opportunity-ventures-deeper-into-perseverance.html goes into a lot of detail about driving and energy production challenges... plus a huge 15MB "http://planetary.s3.amazonaws.com/assets/images/mer_updates/2017-08/20170901_2-Parting-view-Perseverance-Valley-Sol4765B_P2360_1_L257atc.jpg" (why so-named?).
I've never heard much discussion regarding the current state of Oppy's battery charge capacity after all these years, here we are almost 14 years in now using workarounds to so many ageing issues, yet (mercifully) there seem no worries with the batteries!

here's a http://www.midnightplanets.com/web/MERB/image/04843/1P558139150EFFD0AKP2403R2M1.html stitch anaglyph and crosseye of one section of the upslope dusk images


Posted by: fredk Sep 9 2017, 03:55 AM

QUOTE (atomoid @ Sep 9 2017, 12:04 AM) *
(why so-named?).
Maybe because of the LF wheel problem up there?
QUOTE
I've never heard much discussion regarding the current state of Oppy's battery charge capacity after all these years, here we are almost 14 years in now using workarounds to so many ageing issues, yet (mercifully) there seem no worries with the batteries!
Check out some discussion in http://www.unmannedspaceflight.com/index.php?s=&showtopic=7711&view=findpost&p=225427

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