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

Re:Back-ups for GPS: Satellite-navigation systems at risk of... by derefr on Saturday May 08, 2021 @08:55PM (#27092197)
So... is there a reason that all powers involved wouldn't just use each-others' civilian navigation signals, as the "compliment" for their own military navigation signals? And, as far as they can manage to cryptanalyze them, use each-other's military navigation signals as well?

I.e. why wouldn't you—for any value of "you"—just build your ICBM to be guided by GPS, GLONASS, Galileo, and Beidou (if you can), cross-checking their results against one-another Mars-rover-processor-consensus style?

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Re:Back-ups for GPS: Satellite-navigation systems at risk of... by LargoLasskhyfv on Sunday May 09, 2021 @03:40AM (#27094046)
Why would you rely on something like GPS for something as expensive as an ICBM, when you can have inertial guidance?

Ring laser gyros, for instance.

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