A low cost vehicle location and tracking system

A low-cost GPS (Global Positioning System) tracking system which provides a highly accurate service suitable for operation worldwide is described. The system includes a low-cost vehicle sensor, the TIDGET, developed by NAVSYS, and a PC-based workstation which is located at the customer´s facility. The workstation includes aiding software that allows the vehicle´s location to be computed even when only two GPS satellites are visible. This provides reliable GPS service even in an urban environment. The vehicle location is computed and displayed on a PC workstation at the customer´s dispatch facility. The low cost of the TIDGET sensor combined with the performance of the PC-based workstation provides a highly accurate yet inexpensive vehicle tracking system that is capable of operating anywhere in the world. The system is designed to be integrated with a variety of alternative communication links for any vehicle tracking application