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Chandrayaan-3 Soft-landing [video]

isro.gov.in

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Re: Chandrayaan-3 Soft-landing [video]

#431

Post by mandeepj »

gourabmi wrote: post #429
itissid wrote: post #343

Congrats to all of the team at ISRO. Assuming the software development for these is non trivial; Its interesting that with the last mission(per Scott Manly) was designed to always select a spot(or more precisely a trajectory) and try hit it. What made them make that decision? Was it like "lets be as precise as we can because we want to get to the spot X because X is special" and thus "Lets let the software always com…

If you understand Hindi, Gareeb Scientist has an amazing video about the landing algorithm issues of Chandrayaan-2 https://youtu.be/4oUdD_QSgRs

> If you understand Hindi

Video has captions

Re: Chandrayaan-3 Soft-landing [video]

#433

Post by mendigou »

mkl wrote: post #119
reaperducer wrote: post #59

One of the clocks is labeled "IST," which I assume means India Standard Time. Another clocks are labeled "GHY," "HAW," and "BIK." What do they indicate?

Goonhilly, Hawaii, but I can't figure out BIK. They're NASA and ESA tracking stations: https://www.eoportal.org/other-space-activities/estrack , https://www.indiatoday.in/science/chandrayaan-3/story/how-is...

It's a station from DLR in Bishkek, Kyrgyzstan: https://www.dlr.de/eoc/en/desktopdefault.aspx/tabid-5287/102...

Re: Chandrayaan-3 Soft-landing [video]

#434

Post by chpatrick »

ironyman wrote: post #337
tjpnz wrote: post #297

Earlier quoted context omitted.

Might be time for China to reconsider its role with Russia in future manned moon missions. Any prestige the Russian program once had has long since faded, even ground operations at Baikonur are now at risk with equipment being impounded by bailiffs from Kazakhstan to service billions in debt.

Russia retains an (rapidly diminishing) edge in certain areas of space. One of them is engine design. China is still keen on buying the best Soviet engines, namely Energia's RD-170 and its variants but of course Russia is less than keen on parting ways with them. Even CALT, the major launch vehicle provider in China, admits it will be well into the late 2020s/early 2030s before they can get an engine as good as the R…

I'm surprised that the Atlas V's first stage has these Russian engines.

Re: Chandrayaan-3 Soft-landing [video]

#435

Post by soligern »

zabana wrote: post #206

I wonder what else India could potentially achieve if they could retain their top talent. Congrats !

It’s going to be very hard to brain drain a country of 1.4 billion people. That doesn’t even take into account the massive amount of money the diaspora sends back. The above is usually an argument people make when they don’t want to let immigrants into their country.

Re: Chandrayaan-3 Soft-landing [video]

#436

Post by szundi »

WorldMaker wrote: post #423
Symmetry wrote: post #224

Earlier quoted context omitted.

The ice would also be pretty close to the Moon's peaks of eternal light[1] where you don't have to have your solar panels spend half of every month in darkness. So basically where you'd want to live on the Moon if you had to pick somewhere. https://en.wikipedia.org/wiki/Peak_of_eternal_light

Isn't that also related to why the Lunar Gateway (the proposed space station component of the current Artemis project at Nasa) was proposed to be in a lunar polar orbit?

You can easily reach every spot froma polar orbit as the moon rotates under your orbit

Re: Chandrayaan-3 Soft-landing [video]

#437

Post by Tagbert »

pavon wrote: post #300
ceejayoz wrote: post #178

Earlier quoted context omitted.

https://en.wikipedia.org/wiki/Lunar_south_pole > It is of special interest to scientists because of the occurrence of water ice in permanently shadowed areas around it. The lunar south pole region features craters that are unique in that the near-constant sunlight does not reach their interior. Such craters are cold traps that contain a fossil record of hydrogen, water ice, and other volatiles dating from the early S…

Chandrayaan 3 landed at around 69 degrees south latitude which isn't far enough south to access the permanently shadowed craters where large ice deposits might occur (and the Pragyan rover uses solar panels for power). I haven't read specific reasons for choosing that site, but we have never landed that far south, and it will be interesting to see what differences (if any) there are from the more central latitudes, w…

It may be due to communications problems if a lander came down in one of those shadowed craters. We would not be able to communicate with it. it would probably require relay satellites around the moon to mediate that communication.

Re: Chandrayaan-3 Soft-landing [video]

#439

Post by justinclift »

mandeepj wrote: post #431
gourabmi wrote: post #429

Earlier quoted context omitted.

If you understand Hindi, Gareeb Scientist has an amazing video about the landing algorithm issues of Chandrayaan-2 https://youtu.be/4oUdD_QSgRs

> If you understand Hindi Video has captions

The English captions are pretty decent too. :)

Re: Chandrayaan-3 Soft-landing [video]

#440

Post by darkclouds »

Symbiote wrote: post #425
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.

Note Britain is the third-largest contributor to the European Space Agency, and has a fairly large space industry (satellites, instruments etc). (The Beagle 2 lander which crashed into Mars in 2004 was managed from Britain.)

Stevenage produces tiny satellites, but as long as prices are jacked up, anyone can claim its a big industry. Mr Pillinger is a lovely bloke, but firing a giant zorb ball onto a distance planet or moon, isnt exactly rocket science is it?
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