the submission from 2021 had a "Let's Play" stream showing the thing https://news.ycombinator.com/item?id=26125294 (it's also toward the bottom of the sites page but the YT player is black with an error)
I'm glad those mediafire links are still live because the multiple wayback snapshots are basically bogus due to the extensive use of JS to make the real URL :-(
I own a copy of Paul Zarchan's 'Tactial and Strategic Missile Guidance: An Introduction'. The maths is probably beyond me at this stage but I was always interested in how guided missiles actually work.
There's some awesome youtube videos that teardown guided missiles to identify what goes into them, one i watched was packed with fpga chips, ah, a Javelin: https://youtu.be/11_5TB0-lNw
I wasn't even looking for it I think it got recommended because I like videos about Apollo and Soyez, same thing essentially :D
Too long on (a) - but there are workarounds that require creativity. See "FrankenSAM".
Also, interceptors! Ammunition is something that always runs out either quicker or much quicker or much much quicker than anticipated when shit hits the fan. Because of that I do think we should have a lot more NASAMS constructed, packed up in storage and waiting for the next crisis, as there it's hard to run out of the AMRAAM ammo.
Sorry for the confusion—I know it's weird but the alternative turns out to be even more confusing and we've never figured out how to square that circle!
https://youtu.be/RDJgQErMSdA?t=976