Results 176 to 200 of 371
Thread: New Mars Cameras
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04-09-2014, 12:12 AM #176
As I understand it, the same issue happens occasionally with ground based sensors as well. But yes the atmosphere and magnetic field help protect things here
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04-09-2014, 02:08 PM #177
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04-10-2014, 02:47 PM #178
Doesn't help, but also lack of magnetic field doesn't help. However, you can also get them from decaying radioactive material. Earth based CCD instruments also get them...I recall one paper about some telescope, they blamed them on something decaying in the concrete. More common to see the cosmic ray artifacts in longer exposure images.
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04-10-2014, 10:34 PM #179Something about the wrinkle in your forehead tells me there's a fit about to get thrown
And I never hear a single word you say when you tell me not to have my fun
It's the same old shit that I ain't gonna take off anyone.
and I never had a shortage of people tryin' to warn me about the dangers I pose to myself.
Patterson Hood of the DBT's
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04-14-2014, 04:47 PM #180
^^^I wouldn't call it an anomaly, cosmic rays commonly leave artifacts such as this in images.
If it is glint off a rock, that would be interesting, but not likely.
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04-14-2014, 06:57 PM #181
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04-14-2014, 08:45 PM #182
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05-29-2014, 12:39 PM #183
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05-29-2014, 01:12 PM #184
Is that a hole on the middle wheel?
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05-29-2014, 08:37 PM #185
ok i'm a dumbfuck. How does it take a selfie when there's no arm that would hold the camera visible?
Something about the wrinkle in your forehead tells me there's a fit about to get thrown
And I never hear a single word you say when you tell me not to have my fun
It's the same old shit that I ain't gonna take off anyone.
and I never had a shortage of people tryin' to warn me about the dangers I pose to myself.
Patterson Hood of the DBT's
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05-29-2014, 09:03 PM #186
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05-29-2014, 09:10 PM #187
so i guess the various materials used, say in those wheels, degrade differently than they would in our atmosphere? Maybe there's no rust, but if there was, like, little oxygen, and that was known, would different materials be used?
Something about the wrinkle in your forehead tells me there's a fit about to get thrown
And I never hear a single word you say when you tell me not to have my fun
It's the same old shit that I ain't gonna take off anyone.
and I never had a shortage of people tryin' to warn me about the dangers I pose to myself.
Patterson Hood of the DBT's
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05-29-2014, 09:17 PM #188
It is lots of photos mosaiced into what looks like a selfie. MAHLI is mounted on a turret at the end of the arm but the arm was positioned out of the shot in the images, or portions of images, used in the mosaic. If you look at the shadow you can see the turret and full arm. Here is the frame with part of the arm in it:
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05-29-2014, 09:22 PM #189
How fast does the camera take a photo? It's not like you have to worry about people walking around.
And can pictures be taken while moving or is it only done from a stop?
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05-30-2014, 11:49 AM #190
No it is physical damage, not weathering. They are machined from a block of aircraft grade aluminum, I think the "problem" is they are too thin...but not sure what the official answer is or if it is a problem.
lead rover driver Matt Heverly said that the damage was to be expected. “The ‘skin’ of the wheel is only 0.75mm thick and we expect dents, dings, and even a few holes due to the wheels interacting with the rocks,”
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05-30-2014, 11:53 AM #191
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06-03-2014, 12:02 PM #192
Awesome stuff 406! Again.
Have to say I would not like to be the guy that calls the shots deciding what materiel you are going to use -vs- launchweight -vs- extra energy consumption when rolling...
Must be helluva task to calculate the redundancy-benefit-risk factors.
A quick question : Do you have a general plan/algorithms to match the color temp with your different cameras? Like, you use what, 4 different cameras with different wave
lengths, optical properties, shoot on a planet with peculiar atmosphere and different light and weather.
Are your certain photos graded for civilian consumption in that sense that they are graded towards "this is what a human eye would see" and then you have the
wide spectrum/false color images for all the propellerheads to analyze? Like the selfie and the vista picture are quite different looking.
The floggings will continue until morale improves.
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06-24-2014, 01:17 PM #193
Great little article in the WashPost here.
There's a short vid talking about the selfie and a hole it drilled [is what the caption says, i haven't watched it yet].
Happy Marsiversary! [687 Earth days = 1 Martian year, who knew? ]Something about the wrinkle in your forehead tells me there's a fit about to get thrown
And I never hear a single word you say when you tell me not to have my fun
It's the same old shit that I ain't gonna take off anyone.
and I never had a shortage of people tryin' to warn me about the dangers I pose to myself.
Patterson Hood of the DBT's
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07-02-2014, 11:13 AM #194
They all have bayer color filter arrays, so the basic images from the camera isn't too different from what the eye would see. We have a standard color balance product that we release to the public, called RDRs. But I think most people that are into that are likely doing their own post processing.
From the SIS: Differences in filter and optics transmission and detector sensitivity as a function of wavelength cause color shifts in images unrelated to the actual color of the scene. For the color-corrected image products, we have applied empirically-derived color coefficients derived from imaging neutral gray targets under solar illumination in ground testing. The outcome for flight images is roughly what the planetary surface would look like if it were viewed by the human eye in situ. However, for quantitative color analysis, the radiometrically-corrected but not color corrected products should be used.
More details:
http://pds-imaging.jpl.nasa.gov/data..._RDR_DPSIS.PDF
Section 5 has all the post processing info for RDRs.
I just did an "artistic" auto color balance in GIMP. Time of day can also makes a difference.
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07-25-2014, 02:02 PM #195
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09-26-2014, 11:51 AM #196
Checking our holes in Pahrump
[ right click and open in new tab for full size]
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12-08-2014, 09:20 AM #197
You have anything to do with the Pluto photo expedition? Pretty wild 'waking up' a spaceship after nine years of travel....
NPR Morning Report storySomething about the wrinkle in your forehead tells me there's a fit about to get thrown
And I never hear a single word you say when you tell me not to have my fun
It's the same old shit that I ain't gonna take off anyone.
and I never had a shortage of people tryin' to warn me about the dangers I pose to myself.
Patterson Hood of the DBT's
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12-08-2014, 02:16 PM #198
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12-22-2014, 10:11 PM #199
Wheels on Mars!
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12-22-2014, 10:23 PM #200
^^^good find. We just took that one last week, the front view of it on the pebble is pretty cool also.
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