A satellite navigation system developed by the Department of Defense. The system is provides highly accurate position and velocity information in three dimen- sions and precise time and time interval on a global basis continuously, to an unlimited number of users. It is unaffected by weather and provides a worldwide common grid reference system. The objective of the program is to provide very precise position information for a wide spectrum of military missions. In addition, current policy calls for civil availability with a slight degradation in system accuracy required to protect U.S. national security interests.
Related Terms |
SEEBECK EFFECT
When two different adjacent metals are heated, an electric current is generated between the metals.
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SAFETY CONTROL
Device to stop unit, equipment or system if unsafe pressure and/or temperatures and/or dangerous conditions are reached.
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AGGLOMERATION
The potential of the system for particle attraction and adhesion.
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REMOTE REFRIGERATING SYSTEM
Refrigerating system in which condensing unit is away from space to be cooled.
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AMMETER
An instrument for measuring the magnitude of electric current flow.
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ARC
A flash, caused by an electric current ionizing a gas or vapor.
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REFRIGERATING CAPACITY
The ability of a system to remove heat as compared with the cooling effect produced by melting of ice.
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ADIABATIC PROCESS
A thermo-dynamic process in which no heat is extracted from or added to the system of the process.
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ALIVE
A term referring to a circuit in which a current is flowing. Also referred to as live.
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ACCELERATION
The time rate of change of velocity; i.e., the derivative of velocity; with respect to time.
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