GLOBAL POSITIONING SYSTEM(GPS)

1. Presented By
MD. Sumon Fakir
ID: 173002024
Supervised By
MOHAMMAD EHSAN SHAHMI
CHOWDHURY
LECTURER OF CSE
Green University Of Bangladesh
GLOBAL POSITIONING
SYSTEM(GPS)

2. Table of Contents
 What is GPS
Three Segment Of GPS
 Information In a GPS Signal
 How GPS Works
 Advantages
 Disadvantages
 Application
 Conclusion

3. What is GPS
 The Global Positioning System (GPS) is a satellite-based Navigation
system
 GPS is the shortened form of NAVSTAR GPS. This is an acronym for
Navigation System with Time And Ranging Global Positioning
System.
 GPS uses constellation of 24 satellite to determine. The accurate
three-dimensional position of the user on the earth.

4. Three Segments of GPS
Control Segment
Space Segment
User Segment
Ground
Antennas

5. INFORMATION IN A GPS SIGNAL
Space segment
 GPS Satellite constellation composed of 24 operational satellites in space.
These 24 satellites are placed in 6 circular orbits of period equal to 12hrs
Control Segment
 The control segment comprises of 5 ground stations located on equator
Monitor stations measure the distances of the overhead satellites
User Segment
 The User Segment consists of all earth-based GPS receivers.
The user segment is totally user community, both civilian and military.

6. How GPS Works

7. How GPS Works cont..
 The GPS uses technique of "triangulation" to find location.
 To "triangulate," a GPS receiver measures distance from the satellite using
the travel time of radio signals.
 GPS needs very accurate timing, which is provided by atomic clocks used in
the satellites.
 This information is obtained by Almanac data transmitted by satellites.
 Finally we must correct for any delays the signal experiences as it travels
through the atmosphere.
 To compute a positions in three dimensions

8. Advantages
Easy to navigate Search
 Nearby area Weather
 Information Tracking
Updated regularly

9. Disadvantages
 Need good care and handling
 Need external power
 Inaccuracy
 Potential failures
 Privacy concerns
 Geometry of satellite position
 Satellite clock errors
 SV position

10. Application
 location
 tracking
 Mapping
 Navigation
 Airways and military
 Marin
 Timings synchronizing
 Search and Rescue

11. Conculation
 GPS is very useful during adventures.
 GPS devices are perfect for water navigation.
 Though it has some limitation, it does not considered as a
big error..
 GPS is the most advanced, accurate, commercially available
and multi-use satellite navigation system that has ever been
existed.

12. THANK YOU