GLOBAL POSITIONING SYSTEM (GPS)
Global Positioning System, known as GPS, is a navigation equipment based on an space radio network. GPS has 24 satellites giving exact position in three dimensions, velocity and time, 24 hours a day all around the world and even in adverse weather conditions. GPS is able to serve unlimited users because of the non-existence of direct communication between users and satellites.
GPS in Management of Vehicle fleet, implies resource savings in:
Products Delivering routes optimization: Reduction in customer services' time; an operator from a control center can analyze fleet's traffic behavior (critical routes, time in a certain point, coincidence of vehicles in a certain zone) using historical reports generated by the system and statistical and map measuring tools, in order to make decisions that can improve each vehicle's journal. This can result in great sales and distribution operations savings
Human Resources Optimization: Human Resources dedicated to surveillance and supervision of routes fulfillment, assigned zones and customer services. There are certain enterprises that use additional vehicles exclusively to supervise a vehicle´s fleet, resulting in an arisal of operative costs in service and distribution. With a Control Center an operator can supervise a whole vehicle's fleet and elaborate briefs for decision making.
Security: AVL system is a valuable instrument for designing strategies and procedures, in localization and recovery of stolen vehicles.
Our GPS System Arquithecture
GPS devices in general have the following elements:
Satellites: Belonging to the U.S. Defense Department GPS system, 24 satellites traveling earth circumference in 6 hours at 17.400,00 Kms. of altitude. It is a highly confident navigational system that not even adverse atmospheric conditions can limit. Each satellite emits signals with information, which are captures by the GPS reception device that is located in:
Vehicular Unit: Small receptor wrapped in a metallic layer that is stealthily installed in a car. Inside it, there is a MODEM using a processor with a command and functions of data synchronization, protocol and a decodification of analogic to digital data interpretator, and a Mobile Telephony device to send GPS calculus to the Control Center. In order to calculate its position in three dimensions the GPS has to have received, at least , three satellite signals. Once this position calculus has been achieved, it is send with the SNM altitude, velocity and direction in degrees to the:
Control Center It is constituted by a MODEM with a processor for radio and telephone communications, or a PC with internet for satellite communications; and a Control software with digitalized maps. Once the data string is received at the Control Center, this software process the data and sends the digitalized data to the mobile unit.