The Global Positioning
System, or GPS, is a worldwide navigation system
that uses radio signals broadcast by satellites. Mr. Noel arranged for
Jeremy and Helen to meet with
Mrs. Lyn Anderson who is helping the Delaware
Geographic Data Committee to determine the GPS location of Delaware
schools. They used small portable computerized radio receivers to find the longitude and latitude of where Warner is located.
Their findings were:
Warner front door - Latitude 39° 45.50' or 39.7583°
Longitude -75° 32.95' or -75.5491°
(The minus sign indicates west of the primed meridian.)
The Brandywine Zoo is located 100 yards from Warner's front door so these readings will get you close to the Zoo.
The GPS has about 24 satelites, called Navstars, orbiting the Earth. The GPS receivers used the signals from four of the satellites. Each signal indicated the location of the satellite that sent the signal and the broadcast time. With this information, the people who were using the receivers were able to determine the latitude and longitude, within 100 meters, of where they were standing.
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