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Thread: New Mars Cameras
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03-02-2021, 02:25 PM #326
Interesting article about the processors Perseverance uses: https://www.theverge.com/tldr/2021/3...-cpu-imac-1998
Basically, it uses a special radiation-hardened variant of the same 200MHz PowerPC processor from the original iMac. Fancy new chips can't handle the radiation on Mars. The article doesn't mention it, but I'm guessing the power consumption might also be an issue.
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03-02-2021, 02:48 PM #327
Here’s a summary of things that have happened on earth when redundant processors aren’t put in:
https://www.independent.co.uk/news/s...84616.html?amp_______________________________________________
"Strapping myself to a sitski built with 30lb of metal and fibreglass then trying to water ski in it sounds like a stupid idea to me.
I'll be there." ... Andy Campbell
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03-02-2021, 04:28 PM #328I've concluded that DJSapp was never DJSapp, and Not DJSapp is also not DJSapp, so that means he's telling the truth now and he was lying before.
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03-03-2021, 07:56 AM #329glocal
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03-03-2021, 08:23 AM #330Aim for the chopping block. If you aim for the wood, you will have nothing. Aim past the wood, aim through the wood.
http://tim-kirchoff.pixels.com/
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03-03-2021, 08:38 AM #331
It is a RTG where heat from Plutonium's radioactive decay generates power via a thermocouple. No turbines, no control rods, really no moving parts, and passive cooling. Super reliable, long lasting, doesn't care about distance from the sun/darkness/dust storms like solar/battery systems... most outer solar system probes use RTGs.
Originally Posted by blurred
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03-03-2021, 03:57 PM #332
New Mars Cameras
Thanks splat...appreciate it. It’s a fun project...that had some real life relevance this year with the Perseverance landing. Tried to get some video up of the drops today...but upload not cooperating.
I have 10 more years of this gig....out of PA...and it’s off to the mountains for my “real” job....100+ day dirtbag/mag/ski tech/bum....
Hope some of you will still be around so you can “show me the way”...lol.
Sorry...back to Mars stoke!
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03-03-2021, 08:42 PM #333glocal
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Thanks, Dood! Thought it was plutonium but it's been a while since I've looked at the periodic table. Being a downwinder born in a plutonium cloud from Hanford, I should have looked into adapting and internalizing some of that solid state shit and gotten upgraded with a 120 volt plug a long time ago. Explains my penchant for shorts and tank tops all winter...
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03-04-2021, 07:22 AM #334Aim for the chopping block. If you aim for the wood, you will have nothing. Aim past the wood, aim through the wood.
http://tim-kirchoff.pixels.com/
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03-09-2021, 05:05 PM #335
We built the LCAM for JPL and they used it for the images that did the terrain relative navigation (picking the landing spot) on the rover during EDL. They did not run the camera at max frame rate or pixel frame size, just used it for what they needed, but I still like the images. Purposely underexposed, but can stretch for a better looking image. Field of view is pretty awesome. They are all on the public raw images page under Lander Vision System Camera. https://mars.nasa.gov/mars2020/multimedia/raw-images/
All the time I put in on MSL MARDI, this image reminded me of being the first to see the heat shield fall away on MSL:
Shadow of rover before wheels dropped and dust kicking up:
Watson cover open image is also posted (but not debayered ), so that was exciting to get this morning.
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03-21-2021, 12:52 PM #336
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03-26-2021, 11:24 AM #337
heli update...Lots of WATSON!
NASA is targeting no earlier than April 8 for the Ingenuity Mars Helicopter to make the first attempt at powered, controlled flight of an aircraft on another planet. Before the 4-pound (1.8-kilogram) rotorcraft can attempt its first flight, however, both it and its team must meet a series of daunting milestones.
[...]
The helicopter deployment process will take about six sols (six days, four hours on Earth). On the first sol, the team on Earth will activate a bolt-breaking device, releasing a locking mechanism that helped hold the helicopter firmly against the rover’s belly during launch and Mars landing. The following sol, they will fire a cable-cutting pyrotechnic device, enabling the mechanized arm that holds Ingenuity to begin rotating the helicopter out of its horizontal position. This is also when the rotorcraft will extend two of its four landing legs.
During the third sol of the deployment sequence, a small electric motor will finish rotating Ingenuity until it latches, bringing the helicopter completely vertical. During the fourth sol, the final two landing legs will snap into position. On each of those four sols, the Wide Angle Topographic Sensor for Operations and eNgineering (WATSON) imager will take confirmation shots of Ingenuity as it incrementally unfolds into its flight configuration. In its final position, the helicopter will hang suspended at about 5 inches (13 centimeters) over the Martian surface. At that point, only a single bolt and a couple dozen tiny electrical contacts will connect the helicopter to Perseverance. On the fifth sol of deployment, the team will use the final opportunity to utilize Perseverance as a power source and charge Ingenuity’s six battery cells.
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03-26-2021, 01:26 PM #338glocal
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Thanks for bringing the stoke, dude!
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03-27-2021, 08:17 PM #339
launch lock released:
video made during atlo showing all the steps, 40 sec is the launch lock release:
https://www.youtube.com/watch?v=d5ehz7pHprk
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03-27-2021, 09:30 PM #340
Rad
This is a prelude to helisking CO2 pow on Olympus MonsOriginally Posted by blurred
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03-27-2021, 09:49 PM #341
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03-29-2021, 06:46 AM #342
So cool. I wonder what kind of mods they had to make to that helicopter to get it to work in Mars' thin atmosphere. Looks like it has really wide blades relative to earth bound heli-drones.
Also, it is also interesting to think about how the legs of the heli drop into place. There must be some sort of assistance (e.g. springs) to make sure they go all the way down and snap into place. If the drop-and-snap is strictly gravity based, they would have to ensure the mechanism accounts for the weaker gravity on mars.
Now I'm also thinking that the weaker gravity+the thin atmosphere may actually cancel out having to do a whole lot to make up for the reduction in lift due to the thin atmosphere.Aim for the chopping block. If you aim for the wood, you will have nothing. Aim past the wood, aim through the wood.
http://tim-kirchoff.pixels.com/
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03-29-2021, 08:04 AM #343
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03-31-2021, 03:44 PM #344
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04-02-2021, 09:16 AM #345glocal
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Mars dust sastrugi!
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04-02-2021, 10:23 PM #346
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04-19-2021, 10:04 AM #347
Successful first flight:
Aim for the chopping block. If you aim for the wood, you will have nothing. Aim past the wood, aim through the wood.
http://tim-kirchoff.pixels.com/
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04-19-2021, 11:17 AM #348
Historic moment!
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04-19-2021, 11:39 AM #349
Hell yeah. That’s awesome
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04-19-2021, 03:30 PM #350
Damn!
The floggings will continue until morale improves.
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