The US still has a fairly robust network of VOR's / VOR with DME / VORTAC stations. Good for navigation, but there's no timing component, beyond what's inherent in how they operate.
Admittedly, that'll never be of use outside aviation as its line-of-sight only. But if the sun threw a Carrington event (or worse) at us, I think a lot of western aviation could carry on.
> The US still has a fairly robust network of VOR's / VOR with DME / VORTAC stations. Good for navigation, but there's no timing component, beyond what's inherent in how they operate. Admittedly, that'll never be of use outside aviation […]
I'm aware of the FAA's MON, Minimum Operating Network.
Exactly: that doesn't help boats. Or people in cars. Or farmers:
* https://www.deere.com/en/technology-products/precision-ag-te...
It doesn't help those that use GNSS for precise timing (TCXOes can only 'free run' for a finite amount of time before drift compounds 'too much').
A lot of these were getting dismantled until quite recently, but given recent developments they should obviously be kept
> A lot of these were getting dismantled until quite recently, but given recent developments they should obviously be kept
The FAA has always planned for keeping a non-GNSS-based infrastructure:
* https://www.faa.gov/air_traffic/flight_info/aeronav/acf/medi...
* https://www.federalregister.gov/documents/2012/08/21/2012-20...
* https://download.aopa.org/epilot/2012/120112VOR-MON-White-Pa...
* https://flighttrainingcentral.com/2017/03/legacy-navigation-...