navigation acronyms, abbreviations and definitions - International ...

DOP dilution of precision
A dimensionless number that accounts for the contribution of relative
satellite geometry to errors in position determination.
DORIS Doppler Orbitography and Radiopositioning by Satellite
DOT Department of Transportation (US)
DOTIS (D-OTIS) Digital Operational Terminal Information Service (air)
DP dew-point
DP dynamic positioning
DPDR delta preliliminary design review (Galileo)
dps degrees per second (eg in gyro spec)
DPS dynamic positioning system
DQI Digital Quartz Inertial Measurement Unit (Boeing, US)
DQM data quality monitoring
DR dead (deduced) reckoning
DR drifting (met)
DRA digital radio-altimeter
DR cor
corrected DR position
Estimated position obtained by adding to the last fix course (track)
and speed.
DRG digital route guidance
DRI driver restriction information (eg info on blocked roads)
Drift angle Angular difference between: (Sea) course of advance and course
through water; (Air) heading and track.
DRISL Data Relay Inter-Satellite Links (part of WSN)
DRIVE Dedicated Road Infrastructure for Vehicle Safety in Europe (EU)
Also known as ‘Driving Implementation and Evaluation of C2X
Communication Technology in Europe (DRIVE C2X)’.
DRL data relay link (eg between satellite and ground)
DRL daytime running light (vehicle)
DRM data resource management (comms)
DRM digital road map
dRMS distance root-mean-square
The root-mean-square of the radial distances from the true position to
the observed positions obtained from a number of trials.
DRN data radio network
DRS dead reckoning system
DRS differential reference station
DRT demand responsive transport (small buses etc)
DS duststorm (met)
DS-CDMA direct-sequence code-division multiple access
DS-UWB direct-sequence UWB
DSAC Direction de la Sécurité de l’Aviation Civile (France)
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