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submitted 7 months ago by [email protected] to c/[email protected]
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[-] [email protected] 166 points 7 months ago* (last edited 7 months ago)

Considering it was just meant to be a proof of concept and only fly once or twice I would say that 71 flights, a max altitude of 78 ft(24 m), and 10.6 miles or 17 kilometers of travel, not to mention all of the footage from its on board cameras, makes Ingenuity an astounding success.

[-] [email protected] 52 points 7 months ago

Especially considering the use of off-the-shelf Snapdragon 801.

There's some nice discussion about Ingenuity here: https://news.ycombinator.com/item?id=26177619

...This processor will have not flips on Mars, possibly up to every few minutes. Their solution is to hold two copies of memory and double check operations as much as possible, and if any difference is detected they simply reboot. Ingenuity will start to fall out of the sky, but it can go through a full reboot and come back online in a few hundred milliseconds to continue flying.
-jhurliman

[-] [email protected] 51 points 7 months ago

Reboot mid flight is a funny solution

[-] [email protected] 27 points 7 months ago

Imagine telling an airline pilot to just reboot the whole plane if something goes wrong.

[-] [email protected] 16 points 7 months ago

During a flight is a bit much, but some aircraft have a reboot between flights as a standard procedure to fix glitches that would happen if the plane was left on for the entire time.

[-] [email protected] 1 points 7 months ago
[-] [email protected] 2 points 7 months ago

Nothing that high level. Different systems are running independently, some may be redundant to each other in case one fails. But run something long enough especially in extreme conditions and things can drift from the baselines. If a power off and on regularly prevents that it's a lot easier than trying to chase down gremlins that could be different each time they pop up for different reasons.

Even NASA I believe has done such resets from Apollo through the unmanned probes from time to time. Mentioning Windows, the newest versions don't really do this baseline reset if you just shut them down, even if you disable the hibernate/sleep modes, while a restart does.

[-] [email protected] 6 points 7 months ago

"Tower, we have some problems"
"Have you tried turning it off and on again?"

[-] [email protected] 3 points 7 months ago

You'd be surprised. We only do that on the ground, though.

[-] [email protected] 43 points 7 months ago

NASA's rovers have been kicking ass for the last few decades. Truly a testament to how great their engineering teams are

[-] [email protected] 28 points 7 months ago

Definitely exceeded my expectations.

[-] [email protected] 27 points 7 months ago

I think it exceeded everyone's expectations. I know I'm pretty astounded. I didn't realize it had been three years!

[-] [email protected] 2 points 7 months ago

Based on how the rovers have over-performed on not that surprised (once we knew it could fly), but still very excited and impressed.

[-] [email protected] 12 points 7 months ago

I was amazed it could fly at all in the thin atmosphere of Mars.

[-] [email protected] 13 points 7 months ago

I believe they took this into account when they designed the thing.

[-] [email protected] 6 points 7 months ago

Absolutely, but until you fly a heli on Mars you don't know 100% if it will work.

[-] [email protected] 26 points 7 months ago

This isn’t the first time they lost contact so it may not be a huge issue in the end.

[-] [email protected] 20 points 7 months ago

It's almost definitely because it doesn't have Line Of Sight to establish the connection.

Sort of like how cheap fpv drones will lose video when you fly into another room because the thin drywall blocks the signal enough and the signal can't bounce off other objects in the right way.

So I'm going with "once the rover catches up like last time it'll be fine"

[-] [email protected] 25 points 7 months ago

I never had contact with it so they are still one up on me.

[-] [email protected] 3 points 7 months ago

You've got to point your dish at Mars first, otherwise you can't hear it.

[-] [email protected] 20 points 7 months ago

Perhaps the brilliant bunch of folks at JPL will sort this out.

[-] [email protected] 13 points 7 months ago

Yeah they were out of contact for 63 days when it flew ahead of perseverance last year: https://phys.org/news/2023-06-ingenuity-mars-helicopter-home.html

The article doesn't seem to suggest that they've given up on it.

[-] [email protected] 16 points 7 months ago
this post was submitted on 20 Jan 2024
221 points (95.9% liked)

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