GPS Positioning
Most modern GPS modules use all satellite signals, so it should be all US, European and other satellites. Whatever is available in your area.
Remember that GPS requires clear sky visibility. If you have tall buildings around or you're under a roof, the signal will be reflected and the accuracy can be very low.
A month ago I bought Freematics ONE+ Model B with GPS device and there is a distortion of 200 meters in the positioning.
Is it possible to regulate the accuracy of the GPS? What GPS is Traccar working with, with the United States or with the European one?
Greetings