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Mars Science Lab Cameras
Guest_Sunspot_*
post May 20 2004, 01:23 PM
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Has anyone any idea what kind of imaging system is being proposed for the MSL? Would it be the same or simiilar to the MER's, or as improved as the MER pancams are to those that were used on Pathfinder?

With a nuclear power source for the rover, and hopefully the mars telecoms orbiter in place the data rate and data volume could be phenomenal blink.gif blink.gif
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djellison
post Dec 20 2004, 02:12 PM
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Going on the recent news ( i LOVE looking at really old forum posts biggrin.gif ) the answer involves any and all of the following words

Order of Magnitude

Can of Whoop Ass

Mike Malin

VIDEOS

Where did all my bandwidth go

wink.gif

Doug
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RNeuhaus
post Jul 8 2005, 01:39 AM
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The new bandwith that the MRO will transmit is between 1 to 30 MBits/sec depending upon to the Mars' atmosphere transparency between MRO and Earth. The improved transmission bandwith is based on new technology of utilizing the bandwith closer to the light.

Rodolfo
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Guest_BruceMoomaw_*
post Jul 8 2005, 02:12 AM
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There was a lot on this at the recent LPSC:

http://www.lpi.usra.edu/meetings/lpsc2005/pdf/1214.pdf
http://www.lpi.usra.edu/meetings/lpsc2005/pdf/1170.pdf
http://www.lpi.usra.edu/meetings/lpsc2005/pdf/1580.pdf
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James Sorenson
post Sep 1 2008, 11:00 PM
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Forgive me for opening up an old post, but I am a little confused on how Mastcam can aquire both multi-spectral, aswell as natural color imaging all in the same package. How would this all work out when there is bayer filter limited to the visible spectrum and IR filters that move into the infrared part of the spectrum?. How could any narrowband information passing through the filter wheel be salvaged when the light also passes through a broadband bayer filter?. I emailed the MSSS guys about this but have not got a response back mad.gif .

Thanks
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djellison
post Sep 1 2008, 11:15 PM
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http://www.unmannedspaceflight.com/index.p...amp;#entry91486
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James Sorenson
post Sep 1 2008, 11:27 PM
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Thanks Doug smile.gif .
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Guest_PhilCo126_*
post Nov 8 2008, 11:42 AM
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remarkable ChemCam: http://www.youtube.com/watch?v=fEZ5dEi4oPo...feature=related
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BrianL
post Nov 8 2008, 05:00 PM
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It's also reassuring that this rover will be able to defend itself if attacked. biggrin.gif
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jekbradbury
post Nov 8 2008, 07:41 PM
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One issue that just popped into my head (not sure if it's been mentioned before): MSL will survive for a long time, so there will probably be significant dust buildup on MastCam (and on the other cameras), just like with MER. Phoenix showed that a magnetic ring around a surface will prevent that surface from being covered with dust. Has any effort been put into such a system on MSL's camera lenses? Would it even be possible?
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mcaplinger
post Nov 8 2008, 08:08 PM
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QUOTE (jekbradbury @ Nov 8 2008, 11:41 AM) *
...there will probably be significant dust buildup on MastCam (and on the other cameras), just like with MER.

I'm unaware of any quantitative analysis of how much dust buildup there has been on Pancam; maybe others know more. I had thought the dust buildup was mostly on the hazcams, which are much closer to the ground.

As for Mastcam, the current fixed-focal-length systems have the lenses set quite far back inside the sunshades (if you look at http://www.msss.com/msl/mastcam/index.html the front element is at about the front of the lens barrel, color-coded red), so the path for dust is quite long. MAHLI, of course, has a movable cover.


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dvandorn
post Nov 8 2008, 08:21 PM
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The MER Navcam lenses (esp. Oppy's) have dust accumulations ranging from light to very heavy -- Oppy's are quite occluded on the right sides of the images. However, this isn't a result of general dust accumulation, it happened almost entirely during the global dust storm (which also deposited dust onto the "protected" optics of the mini-TES instruments on both MERs, enough that it might possibly render the devices useless).

I think there's a difference between designing optics to remain "as clean as possible" during normal accumulation cycles and designing dust-storm-proof optics. I'm positive that MSL's cameras are good for the former, but doubt they're designed to handle the latter.

-the other Doug


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Doc
post Nov 8 2008, 08:33 PM
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QUOTE (dvandorn @ Nov 8 2008, 11:21 PM) *
I think there's a difference between designing optics to remain "as clean as possible" during normal accumulation cycles and designing dust-storm-proof optics. I'm positive that MSL's cameras are good for the former, but doubt they're designed to handle the latter.

-the other Doug


Quite right. Aren't they concerned enough to make a mechanism for removing dust from the lenses?
If I recall well, the Beagle 2 lander had a 'wiper' for each eye of its stereo imaging payload. Why on earth won't anyone consider such a thing?


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mcaplinger
post Nov 8 2008, 08:39 PM
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QUOTE (Doc @ Nov 8 2008, 12:33 PM) *
Why on earth won't anyone consider such a thing?

Because the cameras aren't on Earth. Designing a mechanism that can survive for many years under martian conditions and not fail in some way that degrades imaging is not worth it, given the low chance of dust contamination as I have already described.

The cameras are normally stowed pointing down. Was there some period on MER when they were left pointing up?


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djellison
post Nov 8 2008, 09:25 PM
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QUOTE (Doc @ Nov 8 2008, 08:33 PM) *
Why on earth won't anyone consider such a thing?


What makes you assume no one has considered it. I would bet the farm that it's not only been considered, but looked at carefully, the risks studied, and a call made.

Doug
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