(1)
[What is GPS]
& GPS stands for Global Positioning System
& A system of satellites, computers, and recievers that is able to determine the latitude and longitude of a reciver on Earth by calculating the time difference for signals from different satellites to reach the receiver.
& On the right is a diagram of the system.
[Differnt GPS Situations]
& Military GPS has become important for nearly all military operations and weapons systems. More than 9000 GPS receivers were used by U.S. and coalition forces during Operation Desert Storm.
& Space In addition, it is used on satellites to obtain highly accurate orbit data and to control space craft orientation.
& WTC Clear Up GPS has played a big role in aiding to clear ground zero. GPS units can collect data from materials so it can be collated and documented on computers to map out where th eobjects may have come from within the twin towers.
(2)
& If i were out camping, boating, or hiking and I manage to get lost, but have a GPS, it would be enclosed in a case.
& A degree, minute or second of latitude remains fairly constant from the equator to the poles. A degree, minute, or second of longitude can very greatly as one approaches the poles. At 38 degrees North latitude, one degree of latitude equals approximately 69 miles, one minute equals 1.15 miles, and one-second equals 101 ft. One degree of longitude equals 54.6 ,one minute equals 0.91 miles, and one second equals 80 ft.
& GPs determines your position on Earth's surface by com[paring radio signals from several satellites. Depending on your geographic location, the GPS receiver samples data from up to six satellites, it then calculates the time taken for each satellite signal to reach the GPS receiver and from the difference in time of reception determines your location.
Eva Ng & Benson Huynh
