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GPS Basics
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The Global Positioning System (GPS) is a
worldwide radio-navigation system formed from
a constellation of 24 satellites and their ground
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stations.
Earth
• Circumference
– 24,000 Miles
• Rotation
– 1,000 Miles/Hour
– 1 Day Cycle
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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
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How GPS Works
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2D Trilateration
625 miles
690 miles
625 miles
625 miles
615 miles
690 miles
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Signal Transmission
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Real World GPS Applications
Location - 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
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Student Map
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GPS Applications
Tree & Plant Identification
Science & Technology
Bicycle Safety
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GPS Applications
High Adventure
Fishing & Canoeing
Science & Technology
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GeoCaching
•
•
•
•
•
•
Scavenger Hunt
Zip Code
Adventure
Educational
Recreation
Families and
Friends
• Exciting and Fun!
www.geocaching.com
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http://www.earthcache.org/
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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/
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Questions?
Comments
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3D Trilateration
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3D Trilateration
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Page
Button
Click
Stick
On/Off Button
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GPS Applications
Wildlife Mapping
Environmental Education
Earth Science
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What is GPS?
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