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Satellite navigation
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=== Alternatives to GNSS === * [https://afwerxchallenge.com/altpntchallenge USSF Alternative Positioning, Navigation, & Timing Challenge Definition Workshop] * [https://spacenews.com/startup-pnt-services/ Startups map out strategies to augment or backup GPS] * [https://spacenews.com/competing-with-uncle-sams-free-space-offerings/ Competing with Uncle Samβs free space offerings] {{TimeSig}} {{Satellite navigation}} {{Satellite navigation systems}} {{Spaceflight}} {{Authority control}} {{DEFAULTSORT:Satellite Navigation}} [[Category:Satellite navigation| ]] [[Category:American inventions]] [[Category:Aircraft instruments]] [[Category:Avionics]] [[Category:Geodesy]] [[Category:Maritime communication]] [[Category:Navigational equipment]]
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