Why is GPS Ineffective Inside Buildings? GPS Alternatives for Positioning and Tracking
The global positioning system (GPS) is widely used all over the world for navigation, tracking, and defining object location. Its operating principle is based on measuring the arrival time of the synchronized signal coming from satellites to antennas (receivers). The technology allows pinpoint the location outside the building with an accuracy of up to 5-10 m. However, in the case of indoor GPS tracking, the system loses its precision.