Carrying a GPS tracker wouldn’t be the smartest thing to do, wouldn’t we need someone like Europe or Canada who control their own satellites to assist?
Would this spark the beginning of a space war?
The same supplies of the current communications. Eriksson, Nokia, Samsung.
Look no further then central American drug cartels who built their own mobile network to avoid lawful interception.
NVIS is hard to locate without flyovers. It bounces the signal of the ionosphere kind of like a water hose shooting water straight up . Transmit and reposition. Range is up to 800km’s .
Alt flood of meshtastic nodes, without GPS data provide encrypted rebroadcast capability.
Checkout s2underground’s project- GhostNet. He’s ex military intelligence. https://github.com/s2underground/GhostNet
GPS devices only receive GPS signals; they do not broadcast any data. So carrying a basic handheld GPS device won’t give away your position to anyone else. However, a smarter device like a phone or InReach emergency locating device can relay your location to others.
For communications, lots of people would suddenly get really interested in VPNs and encryption (for using the existing Internet), private wireless mesh networks (for city- and region-level communication), and even amateur radio. Owners of mesh nodes or radios would need to limit their broadcasting time and/or do a lot of moving around to avoid being located.