Chandrayaan-3 Soft-landing [video] • Hacker News Board

Re: Chandrayaan-3 Soft-landing [video]

#351

Post by dadadad100 » Wed, Aug 23, 2023, 4:30 PM UTC

goku12 wrote: post #262

Rygian wrote: post #227

Earlier quoted context omitted.

That's an example of failing to follow the "Aviate, Navigate, Communicate" rule of thumb.

Could you elaborate how that applies here? Communication is out of the question - there's nothing the people on the ground can correct. And the lander apparently failed because it tried to navigate its way back to the designated landing site.

If you crashed trying to ensure your antenna was optimally oriented then you chose “communicate” over “aviate”. It’s a stretch, but the point is to clearly define your priorities and stick to them, even in a panic

Re: Chandrayaan-3 Soft-landing [video]

#352

Post by mathgeek » Wed, Aug 23, 2023, 4:32 PM UTC

luminati wrote: post #336

skynetv2 wrote: post #329

Despite all the sour comments trying to find fault and criticize, this is a remarkable achievement, especially on the heels of the failed Chandrayaan-2 mission. Congrats to the team!!! Just 4 years to recover from the failure and achieve a phenomenal success. India just keeps executing despite what others may say. The team deserves even more praise to be able to achieve these wins with limited resources.

re: "Just 4 years to recover" This mission was originally slated for 2021 but COVID ended up delaying it.

Which to some makes it even more impressive.

Re: Chandrayaan-3 Soft-landing [video]

#353

Post by cratermoon » Wed, Aug 23, 2023, 4:32 PM UTC

for the 2023 season: India 1, Russia 0

Re: Chandrayaan-3 Soft-landing [video]

#354

Post by publicola1990 » Wed, Aug 23, 2023, 4:33 PM UTC

jvm___ wrote: post #12

Scott Manly has a video on why he thinks the last one failed. It sounds like their landing software didn't have "oh crap, we're way off course, just land wherever". It only had the happy path of "fly to here and land", so when it switched to the landing phase it tried valiently (including flying upside down) to try to fly back to the landing zone, but the landing zone was much further than fuel supplies allowed. Hope…

Also did they use image processing to guide the landing this time? American and Chinese probes seems to use it to do the final phase of soft landing.

Re: Chandrayaan-3 Soft-landing [video]

#355

Post by RajT88 » Wed, Aug 23, 2023, 4:35 PM UTC

AlbertCory wrote: post #305

sph wrote: post #215

Earlier quoted context omitted.

This is the software engineering version of "I am very badass", passing judgement on software at the cutting edge of science, while sitting at home writing React code.

In football journalism they call that Monday Morning Quarterbacking.

In any kind of aggressive manly kind of story, especially involving the military, they're "Keyboard Cowboys".

Or some new ones I've heard kicked around:

- Gravy Seals - 101st Chairborn - Chair Force pilots

...And so on...

Re: Chandrayaan-3 Soft-landing [video]

#356

Post by hh3k0 » Wed, Aug 23, 2023, 4:35 PM UTC

psychphysic wrote: post #172

Congratulations India! And everyone. Actually congratulations to all countries still running space programmes including Russia's failure. The more the merrier. This is a stupendously difficult thing to do, India is truly a superpower.

[flagged]

Re: Chandrayaan-3 Soft-landing [video]

#357

Post by zitterbewegung » Wed, Aug 23, 2023, 4:35 PM UTC

tempnow987 wrote: post #344

kensai wrote: post #332

Earlier quoted context omitted.

And a very inexpensive/frugal attempt for that matter! It has been a miracle of cost effectiveness. This is a wonder on its own.

Really the true wonder! Compare this to the US's SLS plans! The budget is mindboggling.

Yea, back originally when the SLS was on the drawing board to be made it was supposed to be the safest ROI and it hasn’t even been launched successfully yet .

Re: Chandrayaan-3 Soft-landing [video]

#358

Post by darkclouds » Wed, Aug 23, 2023, 4:36 PM UTC

BossingAround wrote: post #340

darkclouds wrote: post #322

Earlier quoted context omitted.

Here Here. It also ironic that a country and population seen as backwards by the British Empire have overtaken the British in landing on the moon. Would be nice to see the African and South American continent achieve a moon landing as well.

Apologies for the OT, but it's "hear hear", not "here here" [0]. [0] https://en.wikipedia.org/wiki/Hear,_hear

My hearing is gone, I forgot about it.

Re: Chandrayaan-3 Soft-landing [video]

#359

Post by hh3k0 » Wed, Aug 23, 2023, 4:37 PM UTC

Trias11 wrote: post #203

The_Colonel wrote: post #71

Earlier quoted context omitted.

Besides what others said, it gets extra spice from the fact Russia failed to do the same just days ago.

Agree. The quicker russians will get rid of putin infestation the sooner this disgrace will end.

[flagged]

Re: Chandrayaan-3 Soft-landing [video]

#360

Post by abhayhegde » Wed, Aug 23, 2023, 4:37 PM UTC

Especially impressive when taken into account that ISRO couldn't achieve the soft-landing with Chandrayaan-2 four years ago.

One of the big things they changed with this lander compared to Chandrayaan-2 was to increase the landing zone from 500mx500m to 4000mx4000m and adding more sensors and cameras to help the computer find a good landing site.

For those who didn't watch live, there was another hover phase (0 m/s descent) at 150m above the lunar surface before final commit.