The Global Positioning System is a worldwide radio navigation system, developed and funded by the United States Department of Defense and operated by the U.S. military. There are 24 solar powered GPS satellites orbiting 11,000 nautical miles above the earth. GPS orbits are arranged so that at any time, from any point on earth, there are at least four satellites visible in the sky.
These satellites transmit radio signals to ground station receivers or to installed devices that contain receivers, which then calculate the position of the vehicle to within 5-10 meters. Developed for use by the military for naviagation, GPS has become an integral asset in various civilian applications, including personal use - for recreational purposes and on automobiles, as well as in surveying and commercial vehicle fleet tracking.
The GPS receiver uses a triangulation mechanism to calculate its position. In a nutshell, GPS satellites broadcast the information about their positions along with the exact time. Knowing the coordinates of the satellite and using the travel time of a radio signal, the GPS receiver measures the distance to a satellite and, as result, calculates its position.
The GPS receiver then forwards location, speed and time stamp data to the device’s processing unit and cellular modem. The vehicle’s coordinates are then transmitted to the GPS Solutions Datacenter via a wireless data network.
The data is then inserted into a series of high end database servers. Clients can log into the GPS Solutions tracker server using our Software and view their vehicle’s location on a detailed Satellite maps.
GSM / GPRS Connectivity
GPRS (General Packet Radio Service) is a packet based communication service for mobile devices that allows data to be sent and received across a mobile telephone network. GPRS is a step towards 3G and is often referred to as 2.5G. Here are some key benefits of GPRS:
GPRS is packet switched. Higher connection speeds are attainable at around 56–118 kbps, a vast improvement on circuit switched networks of 9.6 kbps. By combining standard GSM time slots theoretical speeds of 171.2 kbps are attainable. However in the very short term, speeds of 20-50 kbps are more realistic.
Always on connectivity
GPRS is an always-on service. There is no need to dial up like you have to on a home PC for instance. This feature is not unique to GPRS but is an important standard that will no doubt be a key feature for migration to 3G. It makes services instantaneously available to a device.
- Fleet management – by knowing the location of their trucks, transport companies and/or corporate fleets can reduce costs and have real-time communications in remote areas.
- Localized information – regionalized information that is being aggregated to provide the locations of the nearest gas stations, hotels or four-star restaurants, entertainment, shopping etc.
- Emergency and Safety Services – communications, traffic and navigation information being provided to help service providers to speed response to incidents.
- Network Management – location-based billing and efficient network planning for carriers looking to provide opt-in location services to their wireless data subscribers
The technology enables the way of new horizons.