Author Topic: NASA - Perseverance, Mars 2020 Rover : Discussion  (Read 432450 times)

Offline ccdengr

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1440 on: 01/16/2022 05:38 pm »
I wondered why they didn't put a camera with 12 million pixels (the photos could have been be even better)
Each individual image could have more pixels (which doesn't necessarily equate to better) but by the time you mosaic a whole bunch of images, it doesn't matter so much how big the individual images are.

Compare a single Navcam frame (20 megapixel CMOS) with a mosaic of 2 megapixel Mastcam frames and you'll get a sense of this.
« Last Edit: 01/16/2022 05:40 pm by ccdengr »

Offline cube

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1441 on: 01/16/2022 06:48 pm »
I understood the principle of gathering lower resolution images to give a higher resolution image on the other hand an image from the navcam at 20 megapixels?
Doesn't the Navcam have a lower resolution than the Mastcam?

Offline ccdengr

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1442 on: 01/16/2022 07:10 pm »
Doesn't the Navcam have a lower resolution than the Mastcam?
Optically, but not in terms of pixel count.  At any rate, the cameras are the way they are for reasons that we've tried to explain here.

Offline Blackstar

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1443 on: 01/20/2022 02:10 pm »
Debris has now been cleared.

Offline vjkane

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1444 on: 01/20/2022 04:33 pm »
Debris has now been cleared.
Does anyone know if the tube can be reused?

Offline Blackstar

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1445 on: 01/20/2022 06:54 pm »
Debris has now been cleared.

Apparently they still have to remove a bit more debris. Not done yet, but close.

Offline Blackstar

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1446 on: 01/24/2022 06:09 pm »
There is now a gif available which I think shows some of the debris being shaken out. You'll have to look around to find it. I don't know where it is. Where it was linked from. If you find it, you can post it here.




Perseverance Update: Rick Welch, Deputy Project Manager at NASA's Jet Propulsion Laboratory: Small chunks of debris are believed to be the cause of the unsuccessful transfer of the drill bit and sample tube into the carousel back on Dec. 29. “We appear to have removed most – if not all – of the cored rock that remained in Sample Tube 261.” Animated GIF shows the results of a percussive drill test to clear cored-rock fragments from one of the rover’s sample tubes. Credits: NASA/JPL-Caltech


« Last Edit: 01/24/2022 06:18 pm by Blackstar »

Offline Phil Stooke

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1447 on: 01/24/2022 08:31 pm »

Offline Blackstar

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1448 on: 01/24/2022 08:55 pm »
Cleared.

Offline JonAl

Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1449 on: 01/25/2022 11:33 am »
Looks like that dust can cause some trouble if the couple needs to be hermetic

Offline eeergo

Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1450 on: 02/03/2022 08:14 am »
Long-term plan as of today:
-DaviD-

Offline Cherurbino

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1451 on: 02/09/2022 03:25 am »
Long-term plan as of today:
Hi, eeergo. Could you do a favour to place a link to the page / document where this map is published? To my knowledge it's a derivative work based upon this source map published by JPL on Dec. 15, 2021 (full size ai available at their catalogue at PIA #25027):



The 'added value' to this background are the inscriptions which raise questions.
While ROI (Region of Investigation) names (campaign names) seem to comply with the names used earlier: ROI2 = Delta, ROI3 = Crater Rim, the years are ambiguous.

If we apply season "Spring" to the Earth timekeeping scale (year 2022), then our spring begins in 3 weeks and reaching the Three Forks before the forthcoming summer starts (June 1, 2022) seems unreal.  ;)

However is somebody means "Spring" in the martian dimensions (year = 668/669 sols), then the year numbering must follow the convention, that numbering the Martian years begins at the equinox that occurred April 11, 1955. In this case it shoulb be written something like "Spring of the 37th martian year" (see https://www.planetary.org/articles/mars-calendar)

Offline eeergo

Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1452 on: 02/09/2022 06:00 am »
Long-term plan as of today:
Hi, eeergo. Could you do a favour to place a link to the page / document where this map is published? To my knowledge it's a derivative work based upon this source map published by JPL on Dec. 15, 2021)

It was an image attached to a tweet commenting on a semipublic periodic NASA talk on Mars exploration. I don't remember the specifics, but it was cropped from the presentation slides.
-DaviD-

Offline Phil Stooke

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1453 on: 02/09/2022 06:27 am »
It was from the MEPAG meeting.  The presentation slides will be online soon, here:


https://mepag.jpl.nasa.gov/meetings.cfm

(Meanwhile, enjoy years of previous meeting slides lower on the page)

Offline Cherurbino

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1454 on: 02/09/2022 06:35 am »
Hi, eeergo. Could you do a favour to place a link to the page / document where this map is published?

It was an image attached to a tweet commenting on a semipublic periodic NASA talk on Mars exploration. I don't remember the specifics, but it was cropped from the presentation slides.
Thank you, eeergo. In these circumstances I shall abstain from uploading it to Wikipedia to push this piece of information further to the people: the drawing 'as is' raises questions with no answers or clues to resolve the ambiguity with dates.

Offline Cherurbino

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1455 on: 02/09/2022 06:38 am »
It was from the MEPAG meeting.  The presentation slides will be online soon, here:


https://mepag.jpl.nasa.gov/meetings.cfm

(Meanwhile, enjoy years of previous meeting slides lower on the page)
Phil, you are great... as always ! THANK YOU!

UPD:

Just uploaded both pdf's linked inside the VM14 – Febuary 2-3, 2022 information line, but they contained only agenda. No pdf/ppt documents.
« Last Edit: 02/09/2022 06:49 am by Cherurbino »

Offline eeergo

Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1456 on: 02/09/2022 08:11 am »
Hi, eeergo. Could you do a favour to place a link to the page / document where this map is published?

It was an image attached to a tweet commenting on a semipublic periodic NASA talk on Mars exploration. I don't remember the specifics, but it was cropped from the presentation slides.
Thank you, eeergo. In these circumstances I shall abstain from uploading it to Wikipedia to push this piece of information further to the people: the drawing 'as is' raises questions with no answers or clues to resolve the ambiguity with dates.

There we go, found it by looking up the Twitter image code filename that I didn't change when posting. I uploaded the image itself to contribute my part against overloading the forum pages with avoidable Twitter embed loads :) :

https://twitter.com/genejm29/status/1488979931015139332

This was the presentation:

https://twitter.com/genejm29/status/1488972932642652166

There are some other interesting slides, not grouped in thread style, if you look up on Twitter in advanced mode by date and author: from:genejm29 since:2022-02-02 until:2022-02-03 , such as these ones:

https://twitter.com/genejm29/status/1488982580112330762

https://twitter.com/genejm29/status/1488992738808897536

Offline Phil Stooke

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1457 on: 02/09/2022 05:22 pm »
"Just uploaded both pdf's linked inside the VM14 – Febuary 2-3, 2022 information line, but they contained only agenda. No pdf/ppt documents."

Cherurbino, the presentation slides for every talk will be added to the website eventually, probably in a week or two.

Offline Cherurbino

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1458 on: 02/10/2022 02:36 pm »
This was the presentation:
...
There are some other interesting slides...

Ohhh, eeergo, it's terrific what you brought here! Thank you so much! All the links deserve to be followed by everybody who looks for additional information, especially exact dates and figures. Here I attach one example from the twitter of Gene from which we get to know the sol interval of the last local sandstorm. I shall wait until the 'offficial' PDF that Phil Stooke spoke about shall be available (links to the private twitters are not appreciated in Wikipedia).

Offline Phil Stooke

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Re: NASA - Perseverance, Mars 2020 Rover : Discussion
« Reply #1459 on: 02/17/2022 06:31 am »
https://mepag.jpl.nasa.gov/meetings.cfm

Those presentation slides are now available.  And don't forget to look at the earlier meetings - each one opens up a treasure trove of presentations.

 

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