It is much easier (and more often done) to implement a solution for a static position. Many embassies and other highly sensitive locations have these, commercially available, installations.
We used to build them for fun (no profit) many moons ago.
Basically what you do is place a couple of (1, 2 or whatever) sensors (we used to use these Motorola C123 with osmocom) and just keep taps on signal strength and antenna ID over time, and inspect changes.
Comments
It is much easier (and more often done) to implement a solution for a static position. Many embassies and other highly sensitive locations have these, commercially available, installations.
We used to build them for fun (no profit) many moons ago.
Basically what you do is place a couple of (1, 2 or whatever) sensors (we used to use these Motorola C123 with osmocom) and just keep taps on signal strength and antenna ID over time, and inspect changes.