alt Hacker News>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.
Seems like there's a gap for distributed gnss jamming/spoofing detection systems, not unlike what we have for lightning detection and flight tracking.
Unfortunately gpsjam.org relies on ADS-B data and if you don't have a lot of flights (or ads-b receivers) in an area, it leaves a lot of gaps. Plus it's far from real-time.