Perseverance Lands In Jezero Crater, Sol 0-14 |
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Perseverance Lands In Jezero Crater, Sol 0-14 |
 Mar 6 2021, 01:40 AM
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#451
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 Senior Member  Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152  |
QUOTE (fredk @ Feb 26 2021, 10:06 PM)  Looking at an MCZ frame such as this one: https://mars.nasa.gov/mars2020-raw-images/p...6_034085J01.png It looks like the focus is close to the near foreground at the bottom of the frame and the rocks on the mid-horizon are somewhat soft. However, in the "crater rim" crop of the full 360 pan, released here, those same rocks are in much better focus. It turns out that "crater rim" crop was made from the sol 4 110mm shots, such as this one. They hadn't yet appeared on the public site when I wrote that post. So it wasn't a crop of the 360 deg pan. |
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Mar 6 2021, 03:18 AM
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#452
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Member Group: Members Posts: 406 Joined: 18-September 17 Member No.: 8250 |
QUOTE (eliBonora @ Mar 5 2021, 07:10 AM) To remember the first movements of Perseverance  and also to improve the de-bayer!  Anyone know if "nylon" zip ties have been used on previous rovers or if they are new to Perseverance? |
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Mar 6 2021, 07:05 AM
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#453
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 Member Group: Members Posts: 238 Joined: 15-January 13 Member No.: 6842 |
Hopefully posting this in the right thread.
I had a go at making slo-mo version of the parachute deployment, using Dain AI frame interpolation. https://www.youtube.com/watch?v=ovsG168Hqvk -------------------- Curiosity rover panoramas: http://www.facebook.com/CuriosityRoverPanoramas
My Photosynth panoramas: http://photosynth.net/userprofilepage.aspx...;content=Synths |
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Mar 10 2021, 10:55 AM
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#454
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 Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
Spot on from xkcd
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Mar 10 2021, 03:21 PM
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#455
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Forum Contributor Group: Members Posts: 1372 Joined: 8-February 04 From: North East Florida, USA. Member No.: 11 |
QUOTE (Brian Swift @ Mar 6 2021, 03:18 AM) Anyone know if "nylon" zip ties have been used on previous rovers or if they are new to Perseverance? Here are some zip ties on Opportunity :
Attached thumbnail(s)
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Mar 10 2021, 03:50 PM
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#456
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Senior Member Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152 |
QUOTE (MahFL @ Mar 10 2021, 04:21 PM) Opportunity That's Curiosity. There really are getting to be too many rovers! 
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Mar 10 2021, 05:15 PM
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#457
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Member Group: Members Posts: 102 Joined: 12-August 12 Member No.: 6540 |
While we wait for NASA/JPL to finish their health checks on instruments, I found the following:
1. A company called ABB makes Ty-Rap cable ties that have been used on the Perseverance, Curiosity, Spirit and Opportunity rovers. https://new.abb.com/news/detail/74634/ty-rap-mars 2. The Perseverance twitter feed just posted the sound of laser shots on Mars, and a cleaned up version of the first audio recording from Mars. It's very cool to hear the winds of Mars. For some reason, I thought the wind would have a higher pitch, maybe because of Hollywood? https://twitter.com/NASAPersevere?ref_src=t...7Ctwgr%5Eauthor |
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Mar 10 2021, 07:08 PM
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#458
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Senior Member Group: Members Posts: 2511 Joined: 13-September 05 Member No.: 497 |
QUOTE (Brian Swift @ Mar 5 2021, 07:18 PM) Anyone know if "nylon" zip ties have been used on previous rovers or if they are new to Perseverance? Feel free to peruse https://nepp.nasa.gov/files/27631/NSTD87394A.pdf and learn how to tie lacing tape knots, use zip ties (the doc calls them "plastic straps"), etc. If there's specific guidance about when to use one instead of the other I'm not sure what it is, but I've never been great at tying knots in lacing tape (I've worked with techs who could do it one-handed, really quite impressive.) -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Mar 10 2021, 08:45 PM
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#459
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 The Insider Group: Members Posts: 669 Joined: 3-May 04 Member No.: 73 |
QUOTE (Marvin @ Mar 10 2021, 09:15 AM) 2. The Perseverance twitter feed just posted the sound of laser shots on Mars, and a cleaned up version of the first audio recording from Mars. It's very cool to hear the winds of Mars. For some reason, I thought the wind would have a higher pitch, maybe because of Hollywood? https://twitter.com/NASAPersevere?ref_src=t...7Ctwgr%5Eauthor Really cool. Can we expect stereo with the next lander? 
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Mar 10 2021, 09:25 PM
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#460
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Solar System Cartographer Group: Members Posts: 10153 Joined: 5-April 05 From: Canada Member No.: 227 |
Could use a touch of Dolby as well.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Mar 10 2021, 11:21 PM
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#461
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Senior Member Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152 |
QUOTE (Marvin @ Mar 10 2021, 06:15 PM) I thought the wind would have a higher pitch An unprotected mic (eg a camera mic) in the wind can produce spurious low-pitched rumbles, I guess due to turbulence or oscillations around the mic. I don't know if that might be what we're hearing here. |
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Mar 11 2021, 12:05 AM
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#462
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Member Group: Members Posts: 102 Joined: 12-August 12 Member No.: 6540 |
QUOTE (fredk @ Mar 10 2021, 06:21 PM) An unprotected mic (eg a camera mic) in the wind can produce spurious low-pitched rumbles, I guess due to turbulence or oscillations around the mic. I don't know if that might be what we're hearing here. I was thinking the same thing, especially since the laser shots sounded like what you would expect. But I found a NASA website that simulates various sounds on Mars with the same sounds on Earth: Sounds of Mars Some sounds are more altered than others... From the website: "The atmosphere of Mars, made up of 96 percent carbon dioxide, would absorb a lot of higher-pitched sounds, so only lower-pitched sounds would travel long distances. This effect is known as attenuation -- a weakening of the signal at certain frequencies -- and it would be more noticeable the farther you were from the source." This would explain why the laser shots, which are close to the microphone, sound "normal". Anyway, the sounds will certainly help the engineers and scientists and they sure are interesting to listen to. |
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Mar 11 2021, 06:37 AM
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#463
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 Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Reminder to all that in order to maintain some sort of searchability for future reference we try to organize current events for rovers temporally and spatially (as in traverse legs). Right now, please post all current events in the Perseverance Early Drives thread; thanks!
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Mar 12 2021, 07:57 AM
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#464
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Member Group: Members Posts: 406 Joined: 18-September 17 Member No.: 8250 |
QUOTE (mcaplinger @ Mar 10 2021, 11:08 AM) Feel free to peruse https://nepp.nasa.gov/files/27631/NSTD87394A.pdf Thanks Mike. Brings back fond memories of grandma's mil-spec docs, when she was teaching me to solder as a kid. Not much need to pass on lacing skills since I was just putting together Heathkit projects, not building wiring harnesses for P-3s. |
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Mar 12 2021, 08:06 AM
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#465
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Member Group: Members Posts: 406 Joined: 18-September 17 Member No.: 8250 |
QUOTE (Marvin @ Mar 10 2021, 09:15 AM) 1. A company called ABB makes Ty-Rap cable ties that have been used on the Perseverance, Curiosity, Spirit and Opportunity rovers. https://new.abb.com/news/detail/74634/ty-rap-mars Thanks Marvin. I'd guessed they wouldn't just be nylon. Also, nice to see they aren't crazy expensive, $1-$3 depending on length. |
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