Global Positioning System (GPS) tech diagram shows how GPS works. As the GPS tech diagram below suggests, GPS works through trilateration. Used to calculate location, velocity, and elevation, trilateration collects signals from satellites to output location information. In addition to this, an active GPS tracking system is also known as a real-time system as this method automatically sends the information on the GPS to a central tracking portal or system in real-time as it happens. Usually, students enquire about how GPS tech works. In simpler words, GPS satellites circle the Earth twice a day in a precise orbit. Each satellite transmits a unique signal and orbital parameters that allow GPS devices to decode and compute the satellite's precise location.