Fastactivate tomtom no gps signal
With that timing information in-hand the GPS device then only needs to determine where the satellites are positioned (in their orbit and in relation to each other) in order to calculate the monitored person’s exact position through a form of triangulation. So the GPS device on the monitored person then uses the timing signals it is receiving (and the precise time on earth where it is located) to determine how long it took the satellites’ signals to travel to the GPS device. The signals from the satellites are constantly broadcasting their position and the exact time the signal was sent.
Years ago, these satellites were placed in a constellation by the US Department of Defense and have highly accurate atomic clocks onboard, as well as, predictable orbits and relationships to each other in the sky. There are many detailed explanations out there for you to find on the web…so we will just offer up a simple summary:įixing the position of the GPS device being worn by the defendant depends upon it receiving signals from 4 or more of the 24 satellites revolving around the earth at any time. But that is the visible side of the equation and still does not explain how the device really interacts with the GPS satellites.
The GPS equipment we use in the criminal justice arena includes a more robust design/packaging and carries on-board the necessary cellular communication capabilities, tamper-sensors, schedule/zone regimnens, alert indicators and other security measures. It is a reasonable question given that applying the use of GPS in the public safety arena really is quite different from using a Garmin or TomTom device in your car for navigation or finding a Starbucks.įirst, it’s probably important to distinguish the differences in the actual GPS equipment. This is a question we seem to get more and more as pretrial programs and law enforcement agencies consider using this technology within the community supervision arena.