Top Quark

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@sleepy_izutsumi 5 күн бұрын

hey quark, its only today that i've found your channel. just wanted to say your videos are very nice and informative, love them a lot. even if you won't ever make any vids, just know there are people out there still enjoying your content!!

@TopQuark 5 күн бұрын

Thank you for this, made my day

@voidsabre_ 25 күн бұрын

The word people would use now would be "awe-inspiring"

@deletedgamer111 Ай бұрын

"Let's just ship it and then push the fix to production."

@user-vp3kh6kj2r 2 ай бұрын

Very informative! Thanks 👍🏼

@AW-xj4un 2 ай бұрын

Excellent description of something that was born of laziness and incompetence.

@MichaelPohoreski 2 ай бұрын

@2:10 Standard *2's complement* means negative values have the sign bit *set* so -1 is 1111 1111 1111 1111, and -32768 is 1000 0000 0000 0000.

@madkea4807 4 ай бұрын

Great comedy! Great EXPENSIVE comedy. I can keep laughing as no lives were lost, right

@Naufal-Bagas 4 ай бұрын

keren mas

@Blaze_0101 6 ай бұрын

Does the computer inside rocket has permission to self destruct itself when it is in danger? If is it so then the precious satellites or any other important thing that that the rocket was carrying can be forcefully ejected like pilots in fighter jet do to save time and money right?

@aseemsameer7281 6 ай бұрын

There are some things terribly wrong mentioned in this video. The system did not shut down after calculating the integer overflow. It simply gave an error message. Why would a system shut down if it's software produces an exception? It's against software design fundamentals. Also, we don't need a handling mechanism for the guidance system to handle errors, we either need the main computer to simply support 64 bit integers and not correct itself when guidance system goes down. Lastly, there is no 'freaking out' in software. It's either 1 or 0.

@TopQuark 5 ай бұрын

Thanks for your comments, though I think you're overstating a bit these "terribly wrong" issues. First, the official report on the accident states that the errors encountered caused once of the guidance computers to shut down - this was a programming decision built into the system, and while you say it's against programming fundamentals, it was clearly part of the coding culture at the time. Your second point: it's easy to say what would have made this problem go away in retrospect. That these things weren't done at the time IS THE WHOLE POINT. Finally, "Freaking out" is my shorthand for those 1s and 0s not working out properly and things going badly wrong. So anyway, thanks for watching, and for being interested enough to throw some comments in.

@Trimethopimp 6 ай бұрын

Thanks for this, great video. I'm quite intrigued by rounding errors and the repercussions they can have on systems.

@thomasgreiner1646 6 ай бұрын

Arianespace used the Ariane 4 on board computer with hardly any modifications. This meant they had not calculated for the extreme vibrations with hugely more powerful rocket system the on board computer shut down because of vibration overload. Mission control decided reluctantly to destroy L501 before any other catastrophe (the launch path is eastwards over the mid Atlantic and Gabon, Africa). Sadly a ten year project from ESTEC the 4 Cluster satellites were on board (for measuring the Magnetosphere) The Ariane 5 was designed with much more powerful boosters and Vulcan thruster for human (heavier) space equipment launching but of course there was no one interested after the disaster. Shit happens...

@thomasgreiner1646 6 ай бұрын

It didn't explode itself voluntarily no doubt that would have happened it was deliberately destroyed by mission control. So please don't tell fibs. I was there.

@jamskinner 7 ай бұрын

Why convert from float to int anyway? And why only a 16 bit int? How old is this hardware?

@YagamiAckerman 7 ай бұрын

A type-conversion bug.

@fabuloushairbymelg.6308 8 ай бұрын

Thank you for this

@nurulamaliaramadhani9591 10 ай бұрын

Was there a ethics that was violated in that case?

@SomeRandom6uy Жыл бұрын

Thank GOD James Webb telescope survived the launch.

@randomdude4411 Жыл бұрын

Rocket science is more easier than programming

@adityakhanna113 Жыл бұрын

Dude, your channel is so damn good. i found it after googling about Ariane 5. You have a Ze Frank quality to your voice and style. Love it man

@crispybacon9917 Жыл бұрын

So, it was only 1 second off not blowing up? Tragic

@mark__whitfield Жыл бұрын

My wife hates it when I run out of bits

@sourabhjagtap4950 Жыл бұрын

And that's why exception handling is necessary

@jamskinner 7 ай бұрын

Probably built before exception handling was built into the language.

@Ramdomdude-mt4sw Жыл бұрын

im studying for my software engineering exam, very funny and interesting video thanks

@L4INDIA Жыл бұрын

Are they that stupid?

@reneserna3168 Жыл бұрын

They forgot to change the weighted balls that's all.

@lokesh303101 2 жыл бұрын

1996.

@johanrosenfeld3153 2 жыл бұрын

Bonsoir à tous, Johan, ne t'inquiète pas, il y aura un nouvel agenda des lancements d'Arianespace 1996-1997 qui seront les suivantes: 10/09/96 Vol 91 Ariane 42 P Lanceur L462 ECHOSTAR 2 13/11/96 Vol 92 Ariane 44 L Lanceur L463 ARABSAT 2B & MEASAT 2 30/01/97 Vol 93 Ariane 44 L Lanceur L465 GE-2 & NAHUEL 1A 28/02/97 Vol 94 Ariane 44 P Lanceur L464 INTELSAT 801 16/04/97 Vol 95 Ariane 44 LP Lanceur L467 BSAT-1A & THAICOM 3 03/06/97 Vol 97 Ariane 44 L Lanceur L468 INMARSAT- 3F4 & INSAT -2D 25/06/97 Vol 96 Ariane 44 P Lanceur L466 INTELSAT 802 08/08/97 Vol 98 Ariane 44 P Lanceur L469 PAS 6 Merci cordialement, Johan.

@Joangelis 2 жыл бұрын

great video

@ryanhamstra49 2 жыл бұрын

You mentioned the code ran for 40 seconds then shut down, and on the old rocket it was fine but this one was going faster. My favorite part is the issue happened at 38 seconds into flight, so they didn’t even have to fix the software, they would have just had to do the math and know and shut it down at 35 seconds instead and it would have been fine

@PRCA-zw4xo 2 жыл бұрын

Outstanding video. Thank you so much. Will be showing to my class.

@Mr.Sport37 2 жыл бұрын

make sense

@nilakshguleria2449 2 жыл бұрын

This happens when everyone is positive thinker.

@ignatiusjk 2 жыл бұрын

Yea that's what I was thinking.

@551taylor 2 жыл бұрын

Oops!

@maddies930 2 жыл бұрын

Fab video Chris... loving the channel! You should definitely host a podcast one day :)

@TopQuark 2 жыл бұрын

Thanks! Don’t forget to mash that subscribe button and ring that bell!

@nasserdawood2171 2 жыл бұрын

They should fire that idiot code writer

@SteevyMathew 2 жыл бұрын

It's nice to see you back. It's been a while and I had been wondering if you were still active. I love this video because I have been thinking about making videos for years now and I think it's time I start. And this video solidified it. One of my goals this year is to upload 1 video. I want you to know that you had that effect. I hope life is going well for you during these times and I hope to see more from you.

@pyr0815 2 жыл бұрын

wtf just yesterday i remembered your 'this is awesome video' and watched it again. and thought what a shame it was you don't upload more videos. so that is a surprising gift.

@TopQuark 2 жыл бұрын

I think it’s a shame too. Glad you liked it.

@xxgeorgiakidxx673 2 жыл бұрын

Man, I really like this. Sometimes it's really difficult to do something while comparing yourself to others. I fall into that trap constantly.

@TopQuark 2 жыл бұрын

This is my mantra for 2022. Stop finding reasons not to, just do the thing.

@apolloskyfacer5842 2 жыл бұрын

So it was management cutting costs who were really to blame for this disaster. Did they get the guillotine outa storage ?

@simonnielsen1525 2 жыл бұрын

A very good description of the accident. My CS 101 professor gave a very similar presentation of the problem back in 1996, when the post mortem report first came out.

@-learningastronautics-astr3753 2 жыл бұрын

Soy el único que me que le pasó que al encontrar el título en ESPAÑOL, esperaba oír un video EN ESPAÑOL???

@alextan8924 2 жыл бұрын

Payload is lost

@jgmccabe 2 жыл бұрын

I'm sure this has been addressed, but the bit about "the original programmers decided to keep that bit of code running for 40 seconds after the scheduled lift-off" is a bit of a red herring. The code that was reused was written that way for Ariane 4, but it was management that decided to cut costs by not testing the whole Ariane 5 system in a safe, simulated environment (because, as mentioned, the code had worked perfectly well before) where the "continues running after lift-off but 1. shouldn't, 2. doesn't need to, 3. causes problems" issue would've been found.

@apolloskyfacer5842 2 жыл бұрын

So it was management cutting costs who were really to blame for this disaster. Did they get the guillotine outa storage ?

@zandvoort8616 2 жыл бұрын

Wasn’t the guidance system designed and built by the U.K.?

@letmetlo 2 жыл бұрын

This video is very funny and sad at the same time

@alanomuyaku7445 2 жыл бұрын

Wow!!

@ElRednaxela 2 жыл бұрын

There better be bathroom breaks on the way, that’s a really long car ride

@ElRednaxela 2 жыл бұрын

This is one of my favorite videos on KZbin, well done!

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