how gps tracker work ?
GPS Means Global Positioning System a GPS Satellite used by the navstar. The first satellite in the system, Navstar 1, was launched February 29, 1978. The GPS satellites circle the Earth at an altitude of about 20,000 km (12,427 miles) and complete two full orbits every day. It's wrking at open sky and absolutly free but as per government norms. we install GPS Device in moving object this device capture route of moving object than by using of GPRS this all data send a data collection center we ask it SERVER using a software data will receive our local computer and we can check it where our vehicle is going this all system takes 40 to 60 seconds time so we got report of moving on every 60 seconds.