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Chandrayaan-3 Soft-landing [video]

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Re: Chandrayaan-3 Soft-landing [video]

#12

Post by jvm___ »

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.

Hopefully they have upgraded software to just gracefully attempt a landing, and hopefully they won't be off course.

Re: Chandrayaan-3 Soft-landing [video]

#14

Post by fractalb »

the-dude wrote: post #11

Does anybody know if we will be watching a simulation or actual footage? I am asking because the livestream of the last failed moonlanding this year didn't feature a single second of footage. None.

It's simulation for sure. Would there be sunlight to view it live?

Re: Chandrayaan-3 Soft-landing [video]

#15

Post by vivegi »

the-dude wrote: post #11

Does anybody know if we will be watching a simulation or actual footage? I am asking because the livestream of the last failed moonlanding this year didn't feature a single second of footage. None.

There's no footage from the last one as the lander crash-landed on the surface of the moon.

NASA reported locating the Vikram Lander's debris in Dec 2019: https://www.nasa.gov/image-feature/goddard/2019/vikram-lande...

Re: Chandrayaan-3 Soft-landing [video]

#16

Post by dotnet00 »

the-dude wrote: post #11

Does anybody know if we will be watching a simulation or actual footage? I am asking because the livestream of the last failed moonlanding this year didn't feature a single second of footage. None.

Definitely no footage, at most maybe a picture if it lands successfully.

The only footage we have of any spacecraft landing anywhere other than Earth is either from Apollo or the Perseverance skycrane deployment. If they do have footage, it'll be like the latter, retrieved after the fact.

Re: Chandrayaan-3 Soft-landing [video]

#17

Post by raverbashing »

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…

This applies to general software development but is especially true in this case

While we think "this cannot ever happen" in a lot of cases it can, in ways you did not consider. Both for good and bad

Re: Chandrayaan-3 Soft-landing [video]

#20

Post by imglorp »

the-dude wrote: post #11

Does anybody know if we will be watching a simulation or actual footage? I am asking because the livestream of the last failed moonlanding this year didn't feature a single second of footage. None.

This one has onboard cameras and there are curated videos from other phases of flight at the OP link.
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