16-05-2012, 04:56 PM
GLOBAL POSITIONING SYSTEM and ITS APPLICATIONS
[attachment=22188]
Introduction
Where am I? Where am I going? Where are you? What is the best way to get there? When will I get there? GPS technology can answer all these questions.
GPS satellite can show you exact position on the earth any time, in any weather, no matter where you are!
WHAT IS GPS?
Developed by the U.S. Department of Defense for the Military.
(GPS) is a worldwide, Satellite-based, radio navigation system that will give you the exact position of your vehicles.
A total of 24satellites orbit the Earth, monitored continuously by earth stations.
The satellites transmit signals that can be detected by GPS receivers located in your vehicles and used to determine their location with great accuracy.
GPS Receiver
A GPS receiver's job is to locate four or more satellites, figure out the distance to each, and use this information to deduce its own location.
Hand-held receivers for recreational use with accuracy of 10-15 metres
Vehicle mounted receivers for navigation or agricultural use with accuracy of < 1 metre
Backpack or tripod mounted receivers for surveying use with accuracy of 5 – 10 centimetres
HOW DOES GPS WORK?
Each GPS satellite transmits radio signals that enable the GPS receivers to calculate where its (or your vehicles)location on the Earth and convert the calculations into geodetic latitude, longitude and velocity.
GPS Receivers commonly used in most Vehicle tracking systems can only receive data from GPS Satellites. They cannot communicate back with GPS or any other satellite.
A system based on GPS can only calculate its location but cannot send it to central control room. In order to do this they normally use GSM-GPRS Cellular networks connectivity using additional GSM modem/module.
[attachment=22188]
Introduction
Where am I? Where am I going? Where are you? What is the best way to get there? When will I get there? GPS technology can answer all these questions.
GPS satellite can show you exact position on the earth any time, in any weather, no matter where you are!
WHAT IS GPS?
Developed by the U.S. Department of Defense for the Military.
(GPS) is a worldwide, Satellite-based, radio navigation system that will give you the exact position of your vehicles.
A total of 24satellites orbit the Earth, monitored continuously by earth stations.
The satellites transmit signals that can be detected by GPS receivers located in your vehicles and used to determine their location with great accuracy.
GPS Receiver
A GPS receiver's job is to locate four or more satellites, figure out the distance to each, and use this information to deduce its own location.
Hand-held receivers for recreational use with accuracy of 10-15 metres
Vehicle mounted receivers for navigation or agricultural use with accuracy of < 1 metre
Backpack or tripod mounted receivers for surveying use with accuracy of 5 – 10 centimetres
HOW DOES GPS WORK?
Each GPS satellite transmits radio signals that enable the GPS receivers to calculate where its (or your vehicles)location on the Earth and convert the calculations into geodetic latitude, longitude and velocity.
GPS Receivers commonly used in most Vehicle tracking systems can only receive data from GPS Satellites. They cannot communicate back with GPS or any other satellite.
A system based on GPS can only calculate its location but cannot send it to central control room. In order to do this they normally use GSM-GPRS Cellular networks connectivity using additional GSM modem/module.