JIMMY PETERSON INFORMATION SYSTEMS 100 DR. CARL REBMAN GPS- Global Position Satellite

How GPS works GPS receivers use triangulation to calculate the user's exact location. GPS is composed of 24 satellites placed into orbit by the Department of Defense. Opened to civilians in 1980s. GPS satellites circle the earth twice a day

Communication with Satellites Communication The communications antennae, radio receivers and transmitters enable the satellite to communicate with a command centers.  Rechargeable from sun.  fuel cells that convert chemical energy to electrical energy Tracking Global Position Satellites

GPS Triangulation distances from three satellites intersect at two points, one being earth. Distance= Speed * Time Speed is given at 300,000,000 meters per second which is the speed of light.  GPS Triangulation GPS Triangulation

Cell Phone Tracking Cell phone tacking is done through triangulation. Cell phones broadcast a radio signal. If three or more satellites register current location they can judge longitude, latitude, and altitude. The satellites in orbit transmit precise microwave signals which gives location, speed, direction and time.

Animal GPS Similar to humans with their cell phones, animals can have tracking devices connected to their collars that allow the globally positioned satellites to detect their whereabouts.

GPS Navigation in Cars The same triangulation method can give location, longitude, and latitude within a few feet. Now voice activated to direct you to your destination In Car Demo

24 Satellites cover the entire earth The 24 satellites are distributed equally into six circular orbital planes The orbital planes are centered around earth and are orbiting at an altitude of approximately 12,600 miles.  Each satellite makes two complete orbits every rotation around the earth’s axis.  Velocity-the speed at which it would travel in a straight line and,  The gravitation pull between the Earth and the satellite  How Satellites Work: Teacher Resource How Satellites Work: Teacher Resource

Launching of a Satellite The satellite must be launched high enough to allow the satellite to catch the gravitational pull The constant push and pull of inertia against the capsule keep it in the same rotation around earth.  If you were to launch a satellite at 17,000 mph, the momentum from the launch will allow the capsule to circle the earth.

GPS in Golf Balls The sensor sizes have been reduced to the point that you can find out data from within your golf ball.  Hand held GPS allows you to see the sand bumpers as well as inclination in hills and putting greens.  If GPS were to be located in the golf holes then you could get a direct distance and elevation of the hole.  The information is sent via satellite and then displayed on a PDA device

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