Dr.B.R.AMBEDKAR NATIONAL INSTITUTE OF TECHNOLOGY, JALANDHAR

Department of Electronics and Communication

Introduction to Global Positioning System

By- ANKIT SRIVASTAVA

03104003, G1

INDEX

What is GPS? Background & History. Components of System. Basic Principle of GPS. Area of Application? Advancement in GPS. Conclusion

What is GPS?

It’s a Satellite Navigation System. It gives accurate position of receiver up to 100m Transmit position and time data. GPS uses "man-made stars" as reference points to calculate positions accurate to a matter of meters. 24+ satellites and 5 monitoring stations. 12 hours orbital time Free of Cost

US Space Command

Hawaii

Ascension Is.

Diego Garcia

Cape Canaveral

Monitoring Stations

Kwajalein Atoll

Various Devices Used for GPS

A GPS Receiver GPS Phones

GPS in CAR

Background & History

• 1969—Defense Navigation Satellite System (DNSS) formed• 1973—NAVSTAR Global Positioning System developed• 1978—first 4 satellites launched

Delta rocket launch• 1993—24th satellite launched; initial operational capability• 1995—full operational capability• May 2000—Military accuracy available to all users

Components of System.

Space segment User Segment Ground Control

24 satellites GPS antennas & receiver /processors

Master control station at Schreiver AFB, Colorado

6 orbital planes Position & velocity

Five monitor stations

5 to 8 satellites visible from any point on earth

Synchronized with satellite clock

Backup control system

Basic Principle of GPS.

Position of any receiver is calculated using principle of triangulation (trilateration).

Triangulation (trilateration).

Triangulation (trilateration).

Area of Application?

Military. Search and rescue. Disaster relief. Surveying. Marine, aeronautical and terrestrial navigation. Remote controlled vehicle and robot guidance. Satellite positioning and tracking. Shipping.

Advancement in GPS

Beidon – China's regional system that China has proposed to expand into a global system named COMPASS.

Galileo – a proposed global system being developed by the European Union, joined by China, Israel, India, Morocco, Saudi Arabia, South Korea, and Ukraine, planned to be operational by 2013.

GLONASS – Russia's global system which is being restored to full availability in partnership with India.

Indian Regional Navigational Satellite System (IRNSS) – India's proposed regional system.

QZSS – Japanese proposed regional system, adding better coverage to the Japanese Islands

Conclusion

GPS is a vibrant technology with its applications extended to areas such as Military, Search and rescue, surveillance, Navigation etc.

As the technology grows further we might see its usage extended to common-man, just like mobile phones.

Question and Answer