[Scoundreller]

> When we fly over North America, for example, we see a beautiful signal all the time

I think by “fly”, they mean several hundred km in the air where you have sharply reduced below-the-horizon blocking.

Anyone got any leads on Doppler shift detecting equipment? Not hard to detect you’re getting spoofed or jammed with based on that. Power levels being all improbable wouldn’t be hard to detect either. Difficult to detect if “tuned” to a particular target but blanket spoofing would be hard.

Then at the consumer level, fallback options exist (hi wifi); but having something more local would be nice. FM radio stations maybe? Can mess with those too ofc. AM systems are already a fallback in aviation for gross navigation.

A private GNSS constellation has very business cases.

[colechristensen]

>Anyone got any leads on Doppler shift detecting equipment?

All radio receivers? Detecting the radio doppler frequency shift for satellites is kinda trivial.

Spoofing/jamming systems also trivially include doppler shifts. The more someone is trying to interfere with your specific location, the harder it is to defeat the spoofing.