The Global Positioning System (GPS) is a network of about 30 satellites orbiting the Earth at an altitude of 20,000 km. The system was originally developed by the US government for military navigation but now anyone with a GPS device, be it a SatNav, mobile phone or handheld GPS unit, can receive the radio signals […]
Global positioning systems (GPS) need subscriber information module (SIM) cards, but they are used to assign subscriber information to a global system for mobile (GSM) communication cellular account. GPS devices require SIM cards to interact with a cellular network in some way, the way devices interact with the network and depending on the type of […]
GPS signals are carried through waves at a frequency that does not move easily through solid objects. A GPS device relies on a series of satellites in order to determine where it is physically located. The signals sent from these satellites do not penetrate all kinds of barriers with ease. When you use a GPS inside a building, a […]