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MSL development & assembly, Until it's shipped to the Cape
tharrison
post Sep 20 2010, 04:27 PM
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QUOTE (djellison @ Sep 17 2010, 12:00 PM) *


I've updated these pages so that the links to the full-res versions are now working (in addition to my CTX/MARCI operations duties, I'm also one of the MSSS webmasters as we try to migrate the old website over to a more modern-looking interface). This morning I also posted an updated page of Mastcam pre-launch images and video:

http://www.msss.com/science/msl-mastcam-pr...unch-images.php

Enjoy!

~Tanya


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djellison
post Sep 20 2010, 05:20 PM
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I almost miss the old-school MSSS website - it takes me back to 1997 all over again.

But on the upside - a huge thanks the the additional content, amazing to see MastCAM video
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stevesliva
post Sep 20 2010, 06:03 PM
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Really, you must incorporate an HTML table with fat borders just for nostalgia. wink.gif I'll forgive you for dropping serif fonts. sigh.
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James Sorenson
post Sep 20 2010, 07:20 PM
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Very nice images AND VIDEO!! smile.gif. I am wondering if there is any particular technical reason for the vignetting in the corners of Mastcam? I have noticed in the side shots with the famous swiss army knife, that on the front of the lens assembly's, there are protruding tabs or some sort in all four corners on both camera's. Is this intentional?
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tharrison
post Sep 21 2010, 04:18 PM
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QUOTE (James Sorenson @ Sep 20 2010, 11:20 AM) *
Very nice images AND VIDEO!! smile.gif. I am wondering if there is any particular technical reason for the vignetting in the corners of Mastcam? I have noticed in the side shots with the famous swiss army knife, that on the front of the lens assembly's, there are protruding tabs or some sort in all four corners on both camera's. Is this intentional?


The vignetting is due to the filter wheel. The Mastcam CCD is 1600x1200, but the intention has always been to only send back a 1200x1200 portion such that we're not wasting bits sending back the parts of the image affected by vignetting.

Someday we should auction off that "famous" Swiss army knife on eBay or something... laugh.gif


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ElkGroveDan
post Sep 21 2010, 07:21 PM
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this past Friday (Sept 17, 2010)....


Attached thumbnail(s)
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climber
post Sep 21 2010, 07:41 PM
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Lucky man!
But make sure you check Emily's entry here: http://www.planetary.org/blog/article/00002675/


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punkboi
post Sep 21 2010, 07:50 PM
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QUOTE (ElkGroveDan @ Sep 21 2010, 12:21 PM) *
this past Friday (Sept 17, 2010)....


Nice photos... Pretty interesting that they already uninstalled Curiosity's robotic arm


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djellison
post Sep 21 2010, 08:06 PM
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For those wondering - I think they're doing something with MARDI during those tests - that spot pattern is right underneath it.
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punkboi
post Sep 22 2010, 09:55 PM
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ChemCam instrument delivered to JPL for installation onto Curiosity

http://www.jpl.nasa.gov/news/news.cfm?release=2010-310


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Guest_Oersted_*
post Sep 22 2010, 11:18 PM
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Guests






QUOTE (climber @ Sep 21 2010, 09:41 PM) *
Lucky man!
But make sure you check Emily's entry here: http://www.planetary.org/blog/article/00002675/


Whoa, in that video about the wheels they are saying that the aluminium they're made of only has the thickness of seven pieces of paper! So the aluminium wheels are actually "springy" and flexible, and that is part of the suspension system! - Amazing.
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climber
post Sep 22 2010, 11:30 PM
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QUOTE (Oersted @ Sep 23 2010, 01:18 AM) *
Whoa, in that video about the wheels they are saying that the aluminium they're made of only has the thickness of seven pieces of paper! So the aluminium wheels are actually "springy" and flexible, and that is part of the suspension system! - Amazing.

...and they rely on this system for landing!
Vertical velocity at landing is going to be very close to zero, I'd say...and I'm more concerned by horizontal velocity. I quite do not understand yet how the crane works in this respect. I don't think they are going to use the rude retro rocket system used on MER?


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djellison
post Sep 22 2010, 11:51 PM
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The MER wheels are designed to be slightly flexible as well. It helps just take the edge of the worst of the jarring from driving over rocks ( if you remember Emily's videos of the MSL Scarecrow driving around the remodelled Mars Yard....there are thuds and drops and bangs and crunches)

And despite the MER wheels being designed with that flight flex, I've seen a grown man stand on one on one leg and do everything short of jump up and down on it.


Which bit of the crane don't you understand? The radar can identify and then use the liquid rockets to zero-out the horizontal velocity. Think of the Phoenix landing. Now instead of stopping at an altitude of 0 metres, you just stop slightly higher whilst lowering the rover on the bridle.
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climber
post Sep 23 2010, 03:29 AM
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Thanks Doug for clarification.
I was refering to the video as well were we can see the landing simulations. My feeling was that, if vertical velocity was relatively easy to control using the bridle, horizontal velocity was harder to manage because of wind or pendulum effect....so stressing the boogy system in the "wrong" axis.


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MahFL
post Sep 23 2010, 11:18 AM
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Wow they have some big wheel tie downs on Curiosity.
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