[Pontiac]

The device would emit encrypted radio waves that would be picked up by satellites

Science fiction I suspect.

Maybe I am behind the times as far as chip technology is concerned but I doubt that a chip small enough to be injected would have enough power to be tracked by satellites.

but such technology could certainly still be implemented by having chip readers stationed at places where people frequent as a matter of daily living; gas stations, grocery stores, street corners, movie theaters and so on.

[yazoo]

“Science fiction I suspect.”

A transmitter that would have enough power to transmit to a satellite would require one heavy duty set of batteries.