1. Global Positioning Systems Jessie Fowls Boise State University Operations Management – 345

2. Topics That Will Be Covered GPS definitionGPS definition Brainstorming ExerciseBrainstorming Exercise GPS basic breakdownGPS basic breakdown How GPS worksHow GPS works Real World ExampleReal World Example Application ExerciseApplication Exercise SummarySummary

3. GPS Definition Worldwide space-based radio navigation system consisting of as constellation of 24 satellites and their ground stations. 1Worldwide space-based radio navigation system consisting of as constellation of 24 satellites and their ground stations. 1

4. Brainstorming Exercise How could GPS be used in your company?How could GPS be used in your company? What areas of your company would benefit most from GPS?What areas of your company would benefit most from GPS?

5. GPS Basic Breakdown Consists of 24 Earth-orbiting satellitesConsists of 24 Earth-orbiting satellites Solar cells power each satelliteSolar cells power each satellite Antennas transmit timing info.Antennas transmit timing info. Operated and maintained by U.S. Department of DefenseOperated and maintained by U.S. Department of Defense

6. GPS Basic Breakdown GPS Satellite Facts 2GPS Satellite Facts 2 –Name: Navstar –Altitude: 10,900 Nautical Miles (12,660 Miles) –Weight: 1900 lbs (in orbit) –Size: 17ft. with solar panels extended –Orbital Period: 12 hours

7. GPS Basic Breakdown Three componentsThree components 1)Space: Satellites 2)Control: Master Control Station 3)User Segments: Receivers

8. How GPS Works Five Logical Steps 3Five Logical Steps 3 1)Triangulating or Trilaterating 2)Measuring Distance 3)Getting Perfect Timing 4)Satellite Positions 5)Error Correction

9. How GPS Works Triangulation or TrilaterationTriangulation or Trilateration –Using the distance of 3 satellites measured from your position anywhere on the planet

10. How GPS Works Trilateration IllustrationTrilateration Illustration Suppose you knew you were 625 miles from Boise625 miles from Boise 690 miles from Minneapolis690 miles from Minneapolis 615 miles from Tucson615 miles from Tucson

11. How GPS Works Determines your location to be somewhere near Denver. 4 BoiseMinneapolis Tucson 625 miles 615 miles 690 miles Denver

12. How GPS Works Measuring Distance - Coordinates of your locationMeasuring Distance - Coordinates of your location –Longitude and Latitude –Altitude

13. How GPS Works Getting Perfect TimingGetting Perfect Timing –Radio Signal –Atomic Clock

14. How GPS Works Satellite PositionsSatellite Positions –High Orbits –Careful Monitoring

15. How GPS Works Error CorrectionError Correction –Types of error (slows signal) Charged particles in ionosphereCharged particles in ionosphere Water vapor in troposphereWater vapor in troposphere Ground obstructionsGround obstructions

16. How GPS Works Error CorrectionError Correction –Minimizing Error Predicting delayPredicting delay Comparing signal speedsComparing signal speeds “Dual frequency”“Dual frequency”

17. Real World Example U.K. Coastal Erosion 5U.K. Coastal Erosion 5 –Problem in past and present –GPS is used to prevent destruction of structures

18. Real World Example –Monitor coastline with GPS –Technology used to predict risky areas –Information used for future shoreline management planning

19. Exercise List some possible uses for GPS in general.List some possible uses for GPS in general. More specifically, for what types of things might your company use GPS?More specifically, for what types of things might your company use GPS?

20. Summary GPS: Global Positioning SystemsGPS: Global Positioning Systems –Determines precise location anywhere on Earth Uses advanced technology and an easily understandable method for calculating location.Uses advanced technology and an easily understandable method for calculating location. Can be used in nearly every aspect of business, environment, recreation, education, etc…Can be used in nearly every aspect of business, environment, recreation, education, etc…

21. Summary “GPS is to position what the clock was to time” 6

22. Bibliography “All About GPS” http://www.trimble.com/gps“All About GPS” http://www.trimble.com/gpshttp://www.trimble.com/gps “Global Positioning System.” Microsoft Encarta Encyclopedia. 2002 ed.“Global Positioning System.” Microsoft Encarta Encyclopedia. 2002 ed. Hartman, Julie. “Combination of technologies improves coastal erosion measurements.” Civil Engineering Oct. 2001: 33-35.Hartman, Julie. “Combination of technologies improves coastal erosion measurements.” Civil Engineering Oct. 2001: 33-35. “How GPS Receivers Work” http://www.howstuffworks.com/gps.htm“How GPS Receivers Work” http://www.howstuffworks.com/gps.htm http://www.howstuffworks.com/gps.htm Kaplan, Elliott D. ed. Understanding GPS: Principles and Applications 1st ed. Boston: Artech House, 1996. 487.Kaplan, Elliott D. ed. Understanding GPS: Principles and Applications 1st ed. Boston: Artech House, 1996. 487.