Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Chandrayaan-3 Soft-landing [video]

isro.gov.in

Post reply on HN
Print view View original

311–320 of 542 posts

Re: Chandrayaan-3 Soft-landing [video]

#311

Post by legends2k »

contrarian1234 wrote: post #289
thyrox wrote: post #47

Not asking rhetorically but why is this a big deal? Is it because it's going to the south pole? What are some other benefits to be gained from this?

I'd be curious if it's at all interesting from a technical perspective. It was impressive in the 60s and 70s because a lot of new things needed to be discovered and understood to make it happen. But now a days.. are there really technical aspects that would not be covered in a typical engineering course? I get it's very expensive and hence difficult to pull off - but this makes it comes off as mostly nationalism and…

Technically no one has landed in the crater ridden South pole on the dark side of the moon. Scientifically it's useful to course these uncharted parts of the moon both for water/ice and mineral composition.

I don't see how poverty comes into play here: every nation had similar issues when they were doing space exploration. They are two unrelated spheres. Solving one doesn't mean the other won't be

Re: Chandrayaan-3 Soft-landing [video]

#312

Post by robofanatic »

veave wrote: post #175
thyrox wrote: post #47

Not asking rhetorically but why is this a big deal? Is it because it's going to the south pole? What are some other benefits to be gained from this?

[flagged]

This is nowhere near "inflated"

check this out https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...

Re: Chandrayaan-3 Soft-landing [video]

#313

Post by legends2k »

veave wrote: post #221
abhayhegde wrote: post #210

Earlier quoted context omitted.

So the mission alone is unimpressive in your opinion? If you were to weed out who did this and only focus on the what, would you not have an inch of wonder and applaud the efforts?

That's not what my comment says. Personally I don't know how impressive or unimpressive the mission is since I am not interested in space exploration and I know almost nothing about it.

Though you've no interest in space exploration you qualify to pass judgement on how inflated a space exploration related post, how?

Re: Chandrayaan-3 Soft-landing [video]

#314

Post by cuteboy19 »

mercurialsolo wrote: post #306

Any space mission is fairly complex no matter the agency private or public. For me the most interesting part to watch personally was the telemetry. What's the latency involved here, do they have agency in terms of manual overrides and intervention in case things go wrong? What does RTT look like, are there more efficient encoding of data to allow minimal information?

There is a latency issue, not a throughput issue

Re: Chandrayaan-3 Soft-landing [video]

#315

Post by bagels »

hoseja wrote: post #126
m0llusk wrote: post #86

Earlier quoted context omitted.

If anything they seem to have overcorrected for this. This landing path stopped with a near hover at around 800m, then a prolonged hover at 150m while the lander scoped the situation, then an extremely slow descent that allowed for corrections the whole way down. Very impressive.

Also incredibly inefficient.

It's a lot more efficient than having to send a fourth rocket.

Re: Chandrayaan-3 Soft-landing [video]

#317

Post by albert_e »

contrarian1234 wrote: post #289
thyrox wrote: post #47

Not asking rhetorically but why is this a big deal? Is it because it's going to the south pole? What are some other benefits to be gained from this?

I'd be curious if it's at all interesting from a technical perspective. It was impressive in the 60s and 70s because a lot of new things needed to be discovered and understood to make it happen. But now a days.. are there really technical aspects that would not be covered in a typical engineering course? I get it's very expensive and hence difficult to pull off - but this makes it comes off as mostly nationalism and…

The budget with which this mission was accomplished is something.

Less than a typical hollywood movie budget.

Re: Chandrayaan-3 Soft-landing [video]

#319

Post by goodbyesf »

throwaway_0823 wrote: post #161
shri_krishna wrote: post #142

Earlier quoted context omitted.

> The guy is a megalomanic The Prime Minister is the head of Department of Space, whose primary arm is ISRO. He is the boss. Literally every Prime Minister of India has attended ISRO launches and addressed ISRO after success/failure of launches. > asked Modi to "bless us" You probably aren't Indian but this is quite common in India where we seek blessings from elders.

> He is the boss. No, he's just an elected representative of the people, a government servant. > You probably aren't an Indian I am an Indian. Modi, desperate to project himself, is overruling the President (who is the supreme commander of the armed forces), gotten himself "coronated" in the new Parliament building, gotten his picture put on every citizen's COVID vaccination certificate (as if he has invented the vac…

> No, he's just an elected representative of the people, a government servant.

Yes. The elected leader is the boss of the executive branch of government. One doesn't negate the other.

Re: Chandrayaan-3 Soft-landing [video]

#320

Post by dotnet00 »

lenkite wrote: post #307
dotnet00 wrote: post #44

Earlier quoted context omitted.

That's probably why they haven't officially straight-up announced the issue. This wouldn't be the first time that a mission failed due to embarrassing failures in basic software practices (eg Starliner's initial software bugs emerging from a lack of integrated testing). Main difference is that you aren't triggering a billion overly sensitive nationalistic folks when you point out similar embarrassing errors in most o…

> That's probably why they haven't officially straight-up announced the issue. What do you mean by "they haven't officially straight-up announced the issue." ? They did so - several times actually.

Edit:nvm, I'm wrong, see below

They've given out vague explanations such as a software glitch, while holding the detailed post-mortem back claiming the obviously absurd excuse of national security concerns.

This is counter to how they typically operate as well as how most other agencies/companies around the world operate these days, where they at least explain what went wrong. eg Hakuto-R's team explaining that their flight software thought the radar altimeter was malfunctioning when it wasn't, causing it to rely on the IMU and thus it thought the surface was much higher than it actually was.

Post reply on HN