I read that GPS works by satellites broadcasting a certain frequency and the device receives the signal. So the device knows where it is based on the satellites. If that's all it is, then the satellite shouldn't know where the device is or be able to identify it because the device would just be a receiver.
Don't all GPS devices require SIM cards? I know tracking devices are sometimes GSM and advertised as GPS but I thought GPS devices all needed SIM cards. I may be wrong about that, but I know GPS tracking can be detected so it's transmitting something. Or can those old school GPS navigation systems be detected?
A tracking device needs something so that it can be identified (like a sim card) and has to be communicating with something. But computers that I've seen advertised with GPS have SIM slots too. GSM is a different frequency though so what is identifying the device?
And if you had a GPS jammer is it operating on the same frequency as the satellite or what?
A SIM card doesn’t really have anything to do with GPS. You can probably still get gps shit that doesn’t have a SIM card, you just need the appropriate radio to receive GPS signal. AFAIK there’s no transmission involved in determining a position using GPS, no record of it other than one that a GPS device itself makes (ie in phones the positioning result is reported to the OS and forwarded to interested user land software)
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Originally posted by Lanny
A SIM card doesn’t really have anything to do with GPS. You can probably still get gps shit that doesn’t have a SIM card, you just need the appropriate radio to receive GPS signal. AFAIK there’s no transmission involved in determining a position using GPS, no record of it other than one that a GPS device itself makes (ie in phones the positioning result is reported to the OS and forwarded to interested user land software)
