advancedcelltrackingsystems.com

Advanced Cell Tracking Systems rapidly determines locations from cellular networks and provides the locations, maps, and other information to law enforcement personnel in the field or in the office.

The wireless network tells the phone where to look
for GPS satellites.

A special chip in the phone times the signals from
three satellites to calculate its position.

The network's software monitors the signal at three towers
near the phone.

Comparing the arrival time of the signal at different towers
reveals the phone's location.