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A comment on Back-ups for GPS: Satellite-navigation systems at risk of jamming.

Re:Back-ups for GPS: Satellite-navigation systems at risk of... by teclordphrack2 on Friday May 07, 2021 @09:55PM (#27082926)
I know the usa is working on optical and electronic technology to use the stars even during the day. They can combine that with inertial guidance on cloudy days .
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Re:Back-ups for GPS: Satellite-navigation systems at risk of... by sn_master on Friday May 07, 2021 @09:58PM (#27082942)
Yeah, because SR-71 was very fast, they had to build special computerized star-based navigation system for it, as this was the early 1960s, a decade before GPS.

I wonder how similar the new and old systems are. All the principal astronomical science hasn't changed much at all, we just got faster compute and better optics.

https://timeandnavigation.si.edu/multimedia-asset/nortronics...

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Re:Back-ups for GPS: Satellite-navigation systems at risk of... by trhway on Friday May 07, 2021 @10:31PM (#27083180)
the star-based navigation was common on ICBM back then and i think still is.
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