The document provides an overview of the Global Positioning System (GPS), detailing its evolution from the Defense Navigation Satellite System formed in 1969 to its full operational capability achieved in 1995. It explains the three segments of GPS: satellite, user, and control, along with the principles of triangulation and the significance of accurate timing provided by atomic clocks. Additionally, various applications of GPS are highlighted, including military, surveying, and civilian uses.

1. GPS
Hani Ali
Ghaith Thabit
Dhurgham Fahem

2. OUTLINOUTLIN
What is GPS
Evolution of GPS
GPS segments
Works of GPS
Modulation
Demodulation
GPS frequencies
Applications

3. Global Positioning System
WHAT IS GPS
Constellation
of 24
satellites
To determine
the positions

4. • Developed by US Department of Defense
• 1969—Defense Navigation Satellite System
(DNSS) formed
• 1973—NAVSTAR Global Positioning System
developed
• 1978—first 4 satellites launched
• 1993—24th satellite launched; initial operational
capability
• 1995—full operational capability
• May 2000—Military accuracy available to all users
EVOLUTION OF GPS

5. Satellite
segment
User
segment
Control
segment
GPS SeGmentS

6. The GPS uses technique of (triangulation) to find
location.
WORKS OF GPS

7.  A GPS receiver measures the distance from the satellite
using the travel time of radio signals
 To measure travel time, GPS needs very accurate timing,
which is provided by atomic clocks used in the satellites.
WORKS OF GPS

8. Carrier
wave
PRN
code
INPUT
DATA
Satellite
Signalcarrier
mODULAtIOn

9. Satellite
Signal
Carrier wave PRN code
UOTPUT
DATA
DEMODULATION

10. (1575.42 MHz)
(1381.05 MHz)
(1379.92 MHz)
(1227.60 MHz)
(1176.45 MHz)
GPS FrEqUENcIES

11. • Navigation
• Target tracking
• Search and Rescue
 MILITARY
APPLIcATIONS

12. • GPS for surveying
• Mapping
• Finding lost
vehicles
 CIVILIAN
APPLIcATIONS

13.  Outdoor Navigation with GPS by Stephen W. Hinch
 The GPS Handbook by Robert I. Egbert
 Satellite Communication by T.PrattandC.W.Bostain-John Wiley and
Sons.
 http://www.gpsinformation.net
 http://www.AllGPS.com
 http://garmin.com
 http://colorado.edu/geography/gcraft/notes/gps
 http://trimble.com
 http://www.slideshare.net/gps
references