Post on 18-Dec-2014
description
Kritagya Raj Upadhyay
BIM ‘A’ 1st Sem
118
GPS(Global Positioning System)Technology
Computer Information System
CONTENTS
04/10/232
• Introduction of GPS
• History
• How does GPS works?
• Usefulness of GPS
GPS
INTRODUCTION OF ‘GPS’
04/10/23GPS3
04/10/234
•Space-based.
•Global navigation satellite system.
•Constellation of 24 satellites
and their ground stations.
•Provides location and time
information.
•Maintained by U.S Govt.
•Freely accessible.GPS
04/10/235
HISTORY
GPS
04/10/236
Developed in 1973.
U.S (DoD) for military had to have a precise form of worldwide positioning.
Became fully operated
in 1994.
GPS
HOW DOES GPS WORKS ?
04/10/237 GPS
04/10/238
GPS works in six logical steps:
1.The basis of GPS is ‘triangulation’ from satellites.
2.To ‘triangulate’, a GPS receiver measures distance using the travel time of radio signals.
3.To measure travel time, GPS needs very accurate timing.
4.Along with distance, GPS needs to know exactly where the satellites are in space.
5.GPS must correct for any delays the signal experiences as it travels through the atmosphere.
6.Finally (for us), we can now obtain the precise time and location from the GPS satellites.
GPS
USEFULNESS OF GPS
04/10/23GPS9
04/10/2310
• Provides critical capabilities to military, civil and commercial users around the world.
• Maintains future warfighter advantage over opponents. • Being used now in cell phones as a popular application to
implement the emergency (‘911’) location system.• Calculates the speed and compass heading of the person
or craft carrying it.• Modernizing the global
air traffic system.• Used on boats, ships, airplanes,
cars, and ambulances as well as
by hikers, explorers and
mountain climbers.GPS
LAUNCHING A GPS SATELLITE04/10/2311 GPS
04/10/2312
Thank – You
Any questions ???
GPS