Noun
a system that uses coordinates to establish position
Source: WordNetInternational geodetic organizations like the IERS (International Earth Rotation and Reference Systems Service) speak of a reference system. Source: Internet
Multiple altimeters can be used to design a pressure reference system to provide information about the airplane's position angles to further support inertial navigation system calculations. Source: Internet
Vulcan B.2s were eventually fitted with the twin-gyro free-running gyroscopic heading reference system (HRS) Mk.2, based upon the inertial platform of the Blue Steel missile, which had been integrated into the system when the missile had been carried. Source: Internet
The automatic reference system (ARS) eliminated the theodolites previously used to lay and orient the missile. Source: Internet