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2. 2 GPS Basics

3. 3 The Global Positioning System (GPS) is a worldwide radio-navigation system formed from a constellation of 24 satellites and their ground stations.

4. 4 Earth Circumference –24,000 Miles Rotation –1,000 Miles/Hour –1 Day Cycle

5. 5 GPS Satellites Distance from Earth –½x Earth’s Circumference –12,000 Miles 2 Orbits in 24 Hours –Travel 7,000 Miles/Hour Powered by Solar Energy

6. 6 How GPS Works

7. 7 2D Trilateration 625 miles 690 miles 625 miles 615 miles 625 miles 690 miles

8. 8 Signal Transmission

9. 9 Real World GPS Applications LocationLocation - determining a basic position Navigation - getting from one location to another Tracking - monitoring movement of people and things Mapping - creating maps of the world Timing - bringing precise timing to the world Navigation Tracking Mapping Timing

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11. 11 Student Map

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13. 13 GPS Applications Tree & Plant Identification Science & Technology Bicycle Safety

14. 14 GPS Applications High Adventure Fishing & Canoeing Science & Technology

15. 15 GeoCaching Scavenger Hunt Zip Code Adventure Educational Recreation Families and Friends Exciting and Fun! www.geocaching.com

16. 16 http://www.earthcache.org/

17. 17 Credits -How Stuff Works http://electronics.howstuffworks.com/gps1.htm - 4H Navigation to Success by Brady Mitchell - All About GPS http://www.trimble.com/gps/ - Tracks4Africa http://www.tracks4africa.co.za/# - EARTHCACHE http://www.earthcache.org/ http://electronics.howstuffworks.com/gps1.htm http://www.trimble.com/gps/ http://www.tracks4africa.co.za/#

18. 18 Questions? Comments

19. 19 3D Trilateration

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22. 22 3D Trilateration

23. 23 Click Stick Page Button On/Off Button

24. 24 GPS Applications Wildlife Mapping Environmental Education Earth Science

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26. 26 What is GPS?