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mcaplinger
Posted on: Mar 3 2021, 08:59 PM


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QUOTE (MarkL @ Mar 3 2021, 12:42 PM) *
Who knows if or when they will publish all the individual frames of which there must be several thousand.

They have said they were going to do that, and there are several thousand RDC raw frames on the website already, so why don't you give them a chance? It is only sol 13.
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250497 · Replies: 122 · Views: 103950

mcaplinger
Posted on: Mar 3 2021, 06:22 PM


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QUOTE (MarkL @ Mar 3 2021, 09:59 AM) *
Do you think we might get the actual videos? I would bet there are higher quality videos on the rover...

This is educated speculation from reading the EDLcam paper and from what was said at the press conferences. What was sent down initially was the ffmpeg output produced onboard in the EDLcam Linux computer from the raw frames, and they are in the process of downlinking those raw frames now. What's on the raw images website from EDLcam in cases where the raw frame hasn't come down are the frames that were extracted from the ffmpeg file, and then processed however that website processes images in general. So there aren't any "higher quality videos" on the rover.

Basically what fredk said.
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250492 · Replies: 122 · Views: 103950

mcaplinger
Posted on: Mar 3 2021, 07:32 AM


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QUOTE (MahFL @ Mar 2 2021, 09:58 PM) *
Looks like the cover might be in the closed position.

Um, yeah.
Attached Image
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250483 · Replies: 477 · Views: 263318

mcaplinger
Posted on: Mar 2 2021, 04:08 PM


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QUOTE (Hungry4info @ Mar 2 2021, 04:46 AM) *
LRO has imaged each of the landed Chang'e missions, so presumably MRO can image the Tianwen-1 lander.

I don't know if it applied to LROC imaging, but there needed to be congressional approval for at least some LRO support. See https://www.scientificamerican.com/article/...ion-with-china/
  Forum: Tianwen 1- 2020 Orbiter/Lander · Post Preview: #250458 · Replies: 102 · Views: 104933

mcaplinger
Posted on: Mar 1 2021, 08:35 PM


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QUOTE (MarkL @ Mar 1 2021, 12:27 PM) *
Has anyone found out why the secondary timestamp on the EDL image files are off from camera to camera?

There are timestamp issues on the raw images website which are being worked on.
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250438 · Replies: 122 · Views: 103950

mcaplinger
Posted on: Mar 1 2021, 07:13 PM


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QUOTE (Steve G @ Mar 1 2021, 11:02 AM) *
Has there been any confirmation that the arm has been deployed and working?

On MSL, the arm wasn't moved until 14 days after landing, so if the same holds you shouldn't expect this quite yet.
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250431 · Replies: 477 · Views: 263318

mcaplinger
Posted on: Feb 28 2021, 11:29 PM


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QUOTE (fredk @ Feb 28 2021, 03:00 PM) *
Easier still would be standardized timezones.

Maybe, but all we need now is one base time for sol 0 midnight at each lander.

For martian time zones, see See Arthur C. Clarke, "The Trouble with Time", anthologized in Tales From Ten Worlds.
  Forum: MSL · Post Preview: #250407 · Replies: 990 · Views: 555597

mcaplinger
Posted on: Feb 28 2021, 06:05 PM


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QUOTE (neo56 @ Feb 27 2021, 11:50 PM) *
However, I wonder why Mars24 and JSON files refer to LMST rather than LTST?
Local True Solar Time takes into account the equation of time so it's more relevant isn't it?

Yes, but LMST is easier to calculate and typically what's used for rover planning.

We have enough trouble keeping track of what happens when without having a variable length of day too!
  Forum: MSL · Post Preview: #250394 · Replies: 990 · Views: 555597

mcaplinger
Posted on: Feb 27 2021, 11:31 PM


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QUOTE (MahFL @ Feb 27 2021, 03:19 PM) *
Is there a way to tell the zoom used from the MastCamZ file names ?

Yes. See post #25 in this thread.
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250365 · Replies: 178 · Views: 141331

mcaplinger
Posted on: Feb 27 2021, 10:05 PM


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QUOTE (atomoid @ Feb 27 2021, 01:14 PM) *
On the rover there is an apparent fabric material...

Beta cloth. https://bronaerotech.com/product/ba-500bc-cf500f-beta-cloth/
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250356 · Replies: 477 · Views: 263318

mcaplinger
Posted on: Feb 26 2021, 10:17 PM


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QUOTE (fredk @ Feb 26 2021, 01:06 PM) *
Or was the crop from different frames?

Probably from the tier below in the overlap region?

Not all of the images in the 360 pan are as well-focused as they possibly could be, we're still working on that.
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250328 · Replies: 477 · Views: 263318

mcaplinger
Posted on: Feb 26 2021, 07:00 PM


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QUOTE (phase4 @ Feb 26 2021, 10:51 AM) *
So close. Processing the CAHVOR as VORCAH gave more plausible results, although one decimal off.

Pixel size is 7.4e-6 m = 7.4e-3 mm, is that what you were using?
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250316 · Replies: 178 · Views: 141331

mcaplinger
Posted on: Feb 26 2021, 06:15 PM


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QUOTE (djellison @ Feb 26 2021, 09:45 AM) *
This matches MSL Mastcam Left then smile.gif

Correct. Original MCZ spec was for 34mm to 100mm but we ended up with some extra credit range and can do 26mm to 110mm. Typically values 26, 34, 48, 63, 79, 100, and 110 will be used, but AFAIK nobody is sure yet how they'll be chosen. Zoom has to be stowed at 26mm for driving, so that might motivate use of that setting sometimes.
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250314 · Replies: 178 · Views: 141331

mcaplinger
Posted on: Feb 26 2021, 05:35 PM


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QUOTE (djellison @ Feb 26 2021, 09:30 AM) *
It includes digits in there that describe the focal length in mm as three digits.

Oh yeah, duh. Well, it was much more interesting to extract it from the camera model unsure.gif

FYI, widest angle of MCZ is 26mm.
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250311 · Replies: 178 · Views: 141331

mcaplinger
Posted on: Feb 26 2021, 04:44 PM


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QUOTE (phase4 @ Feb 26 2021, 04:32 AM) *
Thanks for the links. I tried the code but it gave very low values and fluctuating results for the Mastcam-Z focal length.

Seems like, for the one case I looked at, that the values in the JSON are in the order VORCAH instead of CAHVOR as one would expect. I don't know if this is intentional or a bug. And I'm not sure if these models are actually correct anyway. But you could take a look.
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250307 · Replies: 178 · Views: 141331

mcaplinger
Posted on: Feb 26 2021, 05:10 AM


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QUOTE (MahFL @ Feb 25 2021, 08:47 PM) *
Indeed @SpaceGirlKim says they are on Sol4 of the 4 needed Sols.

Well, she says sol 8 is the last sol, and it's sol 7 19:19 right now, so no new imaging until sol 9, and then probably no data until sol 10.
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250298 · Replies: 477 · Views: 263318

mcaplinger
Posted on: Feb 25 2021, 11:14 PM


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QUOTE (John Whitehead @ Feb 25 2021, 03:03 PM) *
Do color calibration targets ever fade (change color) from solar (and worse) radiation on Mars?
How are they tested on Earth and proven to not fade?

https://mastcamz.asu.edu/mars-in-full-color/
QUOTE
At the University of Winnipeg, the effect of intense Mars-like ultraviolet (UV) light on the colors of the eight materials was studied, confirming that the materials will only change very little with UV-exposure through a long mission at the Martian surface.

Typically, they get dusty before fading would be an issue. Hopefully these magnets work better than the last time.
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250286 · Replies: 178 · Views: 141331

mcaplinger
Posted on: Feb 25 2021, 09:56 PM


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QUOTE (phase4 @ Feb 25 2021, 01:00 PM) *
For future use, does anyone know how to obtain the zoom value from the JSON information? Should it be derived from the CAHVOR data?

Should be if the CAHVOR model is set correctly, which they may or may not be at this point. See https://github.com/bvnayak/CAHVOR_camera_model and https://agupubs.onlinelibrary.wiley.com/doi...29/2003JE002199
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250283 · Replies: 178 · Views: 141331

mcaplinger
Posted on: Feb 24 2021, 03:47 PM


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QUOTE (Brian Swift @ Feb 24 2021, 03:30 AM) *
Whatever it is, I can only detect it in the red band.

A transient event that lasts for less than the interframe time will only show up in one band regardless of its actual color.
  Forum: Juno · Post Preview: #250194 · Replies: 9 · Views: 13795

mcaplinger
Posted on: Feb 24 2021, 07:37 AM


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QUOTE (Brian Swift @ Feb 23 2021, 09:46 PM) *
So, I'm wondering of someone here can easily lookup the Jupiter location/coordinates of JNCE_2020101_26C00014_V01-raw.png
pixel x:1541 y:3402, which looks to be the center of a few pixels wide (possibly elongated) bright red spot.

Looks like about 71N 157W, so much farther north.
Attached Image

But that does look like something.
  Forum: Juno · Post Preview: #250185 · Replies: 9 · Views: 13795

mcaplinger
Posted on: Feb 23 2021, 08:56 PM


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QUOTE (ugordan @ Feb 23 2021, 12:45 PM) *
Speaking of raw images, are these weird colorations due to something wrong with the pipeline...

Yes.
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250151 · Replies: 178 · Views: 141331

mcaplinger
Posted on: Feb 23 2021, 01:12 AM


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QUOTE (volcanopele @ Feb 22 2021, 05:04 PM) *
Nothing jumping out at me in the Io images, though I applaud the effort.

We did this mostly to test the timing scheme for the upcoming close encounters (you'll note we didn't have to take a full spin of image for these). We got closer to Io but only after it was in eclipse, so this wasn't a great opportunity.
  Forum: Juno · Post Preview: #250086 · Replies: 8 · Views: 9781

mcaplinger
Posted on: Feb 23 2021, 12:57 AM


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QUOTE (Tom Ames @ Feb 22 2021, 04:45 PM) *
I don't think that's the real code.

https://mobile.twitter.com/FrenchTech_paf/s...992051734478852

There may be more stuff though.
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #250082 · Replies: 477 · Views: 263318

mcaplinger
Posted on: Feb 23 2021, 12:22 AM


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There wasn't enough planetary data around to play with, so we posted the first chunk of PJ32 on missionjuno!
  Forum: Juno · Post Preview: #250076 · Replies: 8 · Views: 9781

mcaplinger
Posted on: Feb 21 2021, 10:06 PM


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QUOTE (ugordan @ Feb 21 2021, 08:41 AM) *
It's as if the raw image site is just plain dead, almost 3 days after the landing. My memory might be fading, but I don't recall this sort of thing happening with MSL.

MSL conveniently landed on a Monday. Most of this, as far as I can tell, is due to a "5-day-a-week during business hours" mentality on the part of somebody and not being able to have a press conference over the weekend.

I don't know of anyone on the team that agrees with this policy, but it is above our pay grade.
  Forum: Perseverance- Mars 2020 Rover · Post Preview: #249996 · Replies: 477 · Views: 263318

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