GPS(Global Positioning System)
Post on 18-Jan-2015
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GLOBAL POSITIONING SYSTEM
Presented By
Asheem Kumar Palo
Ranjan Majhi
INTRODUCTION TO GPS
The GPS project was developed in 1973 by
U.S. Department of Defence
The relatively high positioning accuracies
The capability of determining velocity and time, to
an accuracy commensurate with position
The signals are available to users anywhere on
the globe
It is a positioning system with no user charges
It is an all-weather system, available 24 hours a day
GPS is the backbone for modernizing the global air traffic system
The position information is in three dimensions
TRIANGLUATION
Three ranges are enough if we reject ridiculous
answers or use other tricks
Position is calculated from distance measurements
(ranges) to satellites
Another range is required for the proper accuracy
Mathematically we need four satellite ranges to
determine exact position
STRUCTURE
The current GPS consists of three major segments.
These are:
space segment (SS)
control segment (CS)
user segment (US)
SPACE SEGMENT
GPS block II-A satellite on display at the
San Diego Air & Space Museum
CONTROL SEGMENT
The control segment is composed of
1. monitor stations
2. master control station (MCS)
3. ground antennas
USER SEGMENT:
GPS receivers shown here from
manufacturers Trimble & Garmin
APPLICATIONS
Military
US military tests GPS-guided
missile “Scorpion”
• Navigation
• Target tracking
• Missile and projectile guidance
• Search and Rescue
GPS on Air Planes
GPS in marine system
CIVILIAN USES
Disaster relief/emergency services
Map-making
Navigation
Robotics
Surveying
CIVILIAN USES
Other satellite navigation systems
• GLONASS – Russia's global navigation system fully
operational worldwide.
• Galileo – a global system being developed by the European
Union and other partner countries, planned to be operational by 2014
• Beidou – People's Republic of China's regional system,
currently limited to Asia and the West Pacific
• COMPASS – People's Republic of China's global system,
planned to be operational by 2020
• IRNSS – India's regional navigation system, planned to be
operational by 2012, covering India and Northern Indian Ocean
• QZSS – Japanese regional system covering Asia and Oceania
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