This document discusses the Global Positioning System (GPS). It contains sections on what GPS is, its three segments including space, control, and user segments, how GPS signals work, how GPS determines location using triangulation of signals from multiple satellites, advantages like easy navigation and tracking, disadvantages like inaccuracy and failures, and applications such as location, mapping, and timing synchronization. In conclusion, GPS is a very useful satellite-based navigation system for activities like adventures and water navigation, despite some limitations.

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