the GPS tracking unit in my car is not a crap hand held unit you can buy for a few hundred dollers.
the GPS aerial is located under the dashboard and can see straight through the dash. works fine where there are trees and in the city around high rise buildings.
data is fed back via mobile phone network(GPRS) and data stored on a server after the car is pinged at a set time frame.
not easy to jam tho.
After a mate had his WRX stripped and stolen twice, I installed a GPS/GSM tracking unit INSIDE his passenger seat with a battery that will last 8 hours. so, if they steal his seats from the car again, they are basically taking the tracking system with them as it is hidden in the seat. the unit gets ground from the bolts that attach the seat to the chassis and positive(for bat charging and power) is via the factory loom that tells the car if the seatbelt is plugged in or not.
can't wait for it to be stolen again
