GPS receivers can be carried in your hand or be installed on aircraft, ships, tanks, submarines, cars, and trucks.
These receivers detect, decode, and process GPS satellite signals. More than 100 different receiver models are already in use. The typical hand-held receiver is about the size of a cellular telephone, and the newer models are even smaller. The commercial hand-held units distributed to U.S. armed forces personnel during the Persian
Gulf War weighed only 28 ounces (less than two pounds). Since then, basic receiver functions have been miniaturized onto integrated circuits that weigh about one ounce.

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