This is a basic slide on GPS and it's Applications. I have made it for one of my University Project.

1. GPS and Applications
presented by: Jabed Akhtar
Date: 10th
March 2019

2. GPS and Application
• OVERVIEW
• GPS Segments
• GPS Satellite Constellation
• Control Sites
• How it works???
• Decoding the GPS Signal
• Applications

3. → Overview
• GPS stands for Global Positioning System
• It is Satellite Based Navigation System
• Positioning, or location, informations
-Origined in: US by US
Department of Defence
(DOD) in early 1970s
- first satellite launched:
February 1978

4. → Overview
NAVSTAR GLUNASS IRNSS
Bei-Dou-2 GALILEO

5. → Overview
- Constellation of 24 operational satellites
- all satellites orbiting the earth at about 12000 miles
(∼20,200 km)
- GPS orbital period : about 12 sideral hours
NAVSTAR = GPS

6. GPS Segments
Space Segment Control Segment User Segment

7. Space Segment
--- Each GPS satellite transmits a signal (including: two sine waves, two digital
codes, and a navigation message
Digital Codes : determine the distance from the user‘s receiver to the GPS
satellite
Navigation message : the location of the satellite as a function of time
The transmitted signal are controlled by highly accurate atomic clocks on biard
the satellite
Control Segment
-Worldwide network of tracking systems
- tracking the GPS satellites to predict satellite locations and controlls
every other activities of the satellites
User Segment
-All military and civilian users
- receives a GPS signal form satellite

8. GPS Satellite constellation
•6 Orbital Planes
• each with 4 satellites
• 4 to 10 GPS Satellites
are always visible
• but for 1 user,
only 4 are necessry
MODERN
as of July 2001
5 blocks (total nr of satellite = 29)
here 5 of orbital contains also 5 satellites
and 1 4 satellites

9. Control sites
near Colorado Springs,
Colorado in US

10. • How it works!!!
http://www.bhartitec.ae/services/vehicle-tracking-system-abu-dhabi-dubai/

11. Decoding the GPS Signal
How can we locate Position?
?

12. Decoding the GPS Signal
How can we locate Position?
Use of two receivers
instead of just one
(CORS)

13. Decoding the GPS Signal

14. Decoding the GPS Signal

15. Decoding the GPS Signal

16. Decoding the GPS Signal

17. Decoding the GPS Signal
Trilateration
≠Triangulation/
Mulculateration

18. The GPS calculation in the receiver uses
four equations in the four unknowns x, y, z,
tc, where x, y, z are the receiver’s
coordinates, and tc is the time correction
for the GPS receiver’s clock.
The four equations are:
https://www.courses.psu.edu/aersp/aersp055_r81/satellites/gps_details.html

19. • Applications
AviationAviation
MarineMarine
RailwaysRailways
SpaceSpace
AgricultureAgriculture
TimingTiming
RoadwaysRoadways
Disaster reliefDisaster relief

20. • Applications
Some amazing things to do with GPS
 Earth Tides
 Track the moving earth
 Post Glacial Rebound
 Emergency Rescue

21. https://www.gpscity.ca/gallery/2013/ipad-cockpit-yoke-mount
Aviation

22. http://gpsworld.com/trimble-mapshots-integrate-agriculture-software/
Agriculture

23. Keep Quite!!!
Let me GUESS!!!!!!
Marine

24. Marine

25. References
Pictures
http://www.geostelecom.com/EN/sist_posic_global.html
http://www.bhartitec.ae/services/vehicle-tracking-system-abu-dhabi-dubai/
https://www.courses.psu.edu/aersp/aersp055_r81/satellites/gps_details.html
https://www.gpscity.ca/gallery/2013/ipad-cockpit-yoke-mount
http://gpsworld.com/trimble-mapshots-integrate-agriculture-software/
Books
Introduction to GPS, Ahmed El-Rabbany (2002) The Global Positioning System.
London: Artech House
Applied GPS for Engineers and Project Managers, Clement A. Ogaja (2011).USA: ASCE
Press
GPS, Guochang Xu (2003) Theory, Algorithms and Applications. Berlin: Springer-Verlag
Understanding GPS Principles and Applications, Elliott D. Kaplan (1996) Mobile
Communication Series.
London: Artech House
Internet
Innovations and Advanced Techniques in Computer and Information Sciences and Engineering (2007)
https://www.springer.com/gp/book/9781402062674
GPS.gov

26. The END
THANK YOU