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…
Chandrayaan-3 Soft-landing [video]
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Re: Chandrayaan-3 Soft-landing [video]
#522Not 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?
This may not be a popular question, but given the amount of poverty in India, is a space program really the best expenditure? As a geek, I love the space program. As a human, I don't think it makes sense given the poverty.
https://cdn.cfr.org/sites/default/files/image/2020/12/002_mi...
versus education
https://i0.wp.com/cef.org/wp-content/uploads/slide2-1.jpg
As a human I think you should arrest Elon Musk immediately for misleading advertising and fraudulent claims.
As a human I think the US should open its borders for immigrants from Asia.
As a human I think the US should scrap the petrodollar and licence as much nuclear tech as possible.
Re: Chandrayaan-3 Soft-landing [video]
#523PS: Will they share the data with opensource community for analysis?
Re: Chandrayaan-3 Soft-landing [video]
#524Re: Chandrayaan-3 Soft-landing [video]
#525Earlier quoted context omitted.
Also incredibly inefficient.
What numerator and denominator are you using to calculate the efficiency of an unmanned lunar soft landing mission?
Re: Chandrayaan-3 Soft-landing [video]
#526Earlier quoted context omitted.
A very large number of missions to other planets have failed because they crashed on the planet. Thus anyone who is serious about getting a mission to a different planet will put a lot of effort into the landing system. The fuel burn is cheap compared to a crash landing on the moon (as Russia just had a couple days ago). The above is even at NASA, they have done a lot of complex landing systems over the years. Most m…
Just checking in here, did you find something in my writing that suggested I was being disparaging or dismissive of what an awesome accomplishment this is? If so would love to know how you got there so that I could be more clear in the future.
Re: Chandrayaan-3 Soft-landing [video]
#527Earlier quoted context omitted.
I agree with everything you wrote. But you missed my point - America has an incredible space program despite their wars. If wars were the cause of space program degradation, Russia would actually be ahead .
I'm not a supporter of war mongering by any country. And what I hoped for Russia is what I hope of the entire world. But the assumption that the impact of their war efforts on their economy are similar is completely wrong. Russian economy is in shambles due to it while America goes on as usual.
- https://www.imf.org/en/Publications/WEO/Issues/2023/04/11/wo...
- https://data.worldbank.org/indicator/NY.GDP.MKTP.PP.CD?locat...
- https://www.reuters.com/markets/europe/double-digit-growth-r...
Re: Chandrayaan-3 Soft-landing [video]
#528Does 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.
The lander external view is simulation, but they have a camera (Lander Imager Display) looking downwards that is transmitting live photos every couple of seconds (center, top right on the main screen).
Re: Chandrayaan-3 Soft-landing [video]
#529[flagged]
I get this is tongue in cheek, and it's true that everyone's brown, but a couple of points of note: 1. ISRO has reserved spots for Scheduled Castes / Tribes (historically under-represented castes and tribes), which is far more explicit than having a DEI committee [1] 2. There are probably 10-15 primary languages spoken across the teams given regional differences in India. I would guess society is closer to EU than US…
That said, my comment was pointed more towards NASA and the West generally. I have been getting the sense that NASA don't like the demographic of their organisation very much lately which I think is sad given their accomplishments. Were this a video from a NASA control center I expect a lot of people would be commenting on the colour of people's skin and that's a shame. I have been rightly downvoted here for this.
My comment was in poor taste, but I saw an opportunity to poke fun at the absurdity of the Western view of diversity. For whatever reason I've noticed we seem able to recognise the absurdity of the claims we make about diversity when it's not in a Western context. Eg, the idea that to be successful at anything you need people with different skin colours involved is clearly not true – and it's sad this idea is even being entertained by an organisation as well respected as NASA. They should care about hiring the best individuals the US has to offer. At least in my opinion.
Re: Chandrayaan-3 Soft-landing [video]
#530Earlier 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
Is there a TLDW?
The video provides an explanation for why India's Chandrayaan 2 lunar landing mission failed in 2019. The landing craft Vikram experienced issues during the camera coasting phase where instruments were being calibrated. Specifically, the engine thrust was higher than expected and thrust control couldn't be adjusted to correct the trajectory. As a result, errors accumulated and Vikram's trajectory deviated significantly from the planned path. For Chandrayaan 3, ISRO has implemented changes like adding instantaneous thrust control, increasing the allowed attitude change rate, and enlarging the landing zone to make the mission more robust to errors. The video offers an insightful technical look into what went wrong and how ISRO is addressing it for the next lunar mission.