|
|
Article: GPS UNIT CAN BE USEFUL.(SPORTS)
- Article from:
- Albany Times Union (Albany, NY)
- Article date:
- March 11, 2001
CopyrightCOPYRIGHT 2001 Albany Times Union. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
By ROB STREETER
A number of innovations have found their way into the outdoor market in recent years, but none is more high-tech than the GPS unit.
GPS stands for Global Positioning System. Twenty-four satellites orbit the Earth twice each day at an altitude of 12,000 miles, broadcasting a high-frequency radio signal. A person with a GPS receiver can use and interpret these signals to get an accurate read on his or her location.
With the GPS receiver, latitude and longitude are measured by triangulating the position of the receiver using reference data from three or more satellites at any given time. The time and positioning of the satellites ...