1/ thread on coding and timezones https://twitter.com/LibertyFarmNH/status/1310924205773541377 … I'm currently reading The Apollo Guidance Computer: Architecture and Operation by Frank O'Brien and am now in the chapter about spatial reference frames REEEEEEEEE something like 7 different reference frames >>>
-
-
3/ 3rd stage guidance program has origin point exactly 1,000 inches below the bottom of the heat shield of the capsule ... where the gimbal for the engine is. (exactly 1,000 inches - LOL. So 20th century American !)
Show this thread -
4/ I recall learning in some other context that when the Saturn V launched one thing it did was roll like 8 or 15 degrees or whatever along its vertical axis. ...because it was transitioning from Florida, USA lat-long coordinate system to some other system, and >
Show this thread -
5/ it was just easier to roll the entire dang ship along its axis before handing off from guidance program 1 to 2 than to have the software agree on a single standard.
Show this thread - End of conversation
New conversation -
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.