GPS Example of how GPS works (Global Positioning System)
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Transcript of GPS Example of how GPS works (Global Positioning System)
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GPSGPSExample of how GPS worksExample of how GPS works(Global Positioning System)(Global Positioning System)
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There are 24 satellites in orbit around the earth.
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Suppose one knows that he is 625 miles from Boise, Idaho.
That is the only informati
on he has.
Does he know
where he is?
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Now, suppose he knows that he is 690 miles from Minneapolis, Minnesota.
Now, does he
know where he is?
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Now, let’s add that he knows that he is 615 miles from Tucson, Arizona.
Now, does he know where he is?
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GPS Satellites put out a signal three dimensional, not two dimensional like the flat circles, so it creates a sphere.
Because it creates overlapping spheres the GPS unit can tell elevation in addition to longitude and latitude.
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Satellites circling the earth.
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Cartesian Coordinate System
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Vocabulary:Vocabulary:
•CITO- Cache In Trash Out
•Waypoint- Reference point for a physical location on earth
•Muggled- The act of vandalizing or stealing a cache
•Travel bug- A trackable tag that may be attached to a item in a geocache
•GPS- Global Positioning System
•Coordinate- Any of the magnitudes that serve to define a position of a point
•Geocaching- A world wide game of hiding and seeking treasures
•BYOP- Bring your own pen/pencil