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> how quickly things change but also stay the same As it'd be foolish to rely on things like gps that may no longer be around when you want/need to launch, as
by 082349872349872 2y ago
> how quickly things change but also stay the same
As it'd be foolish to rely on things like gps that may no longer be around when you want/need to launch, as far as I know ICBMs (and presumably also SLBMs?) still shoot the stars near apogee, to fix their reckoning.
- mistrial9 2y agoAgree that non-electronic, non-networked navigation has a place but marine conditions often obscure the skies in this area of the world.. also the on-demand precision of modern times gets to be "required" for various interactions with other humans and their territory.
- adolph 2y agoFor more information: The astro-nav's gimbaled telescope-like system on top of the guidance group works by making an ever-widening circular search pattern to find and fix three of any of 64 mapped stars in its memory, and compares their locations to a Julian calendar and a highly accurate chronometer. https://www.twz.com/17207/sr-71s-r2-d2-could-be-the-key-to-winning-future-fights-in-gps-denied-environments https://www.twz.com/17207/sr-71s-r2-d2-could-be-the-key-to-w... https://timeandnavigation.si.edu/multimedia-asset/nortronics-nas-14v2-astroinertial-navigation-system https://timeandnavigation.si.edu/multimedia-asset/nortronics...