Acronyms T-Z

The following abbreviations and acronyms are used by satellite navigation specialists. If you know of any others that need to be added to the list or if you have any corrections to make, please send us an email.

A-D | E-I | J-P | Q-S | T-Z

T Test or Time
T4S Thomson-CSF / Services et Systemes Sol Spatiaux
TA Terminal Adapter (ISDN modem)
TAS True Air Speed
TBC To Be Clarified or To Be Confirmed
TBD To Be Defined or To Be Determined
TBO Time Between Outages
TBS To Be Studied or To Be Specified by the contractor
TCP Transmission Control Protocol
TCP/IP Transmission Control Protocol/Internet Protocol
TE Test Engineer
TEB Tender Evaluation Board
TEC Total Electron Content
TF Task Force
TGNSS NLES reference Time
TH True Heading
TL Team Leader
TLM TeLeMetry
TLS Target Level of Safety
TM TeleMetry
TMA Technique Management Area
TN Technical Note
TN-033 Technical Note on EGNOS overlay services
TN-069 Operation Concept Document
TOW Time Of Week
TPG Time of Propagation
TRAC Traceability Report
TRB Test Review Board
TRO Time to Restore an Outage
TRR Test Readiness Review
TRSF Transfer
TS Training Segment
TSE Total System Error = ( NSE2 + FTE2)1/2
TSF Test and Simulation Facilities
TSO Technical Standard Order
TTC Telemetry, Tracking and Command
TUE Test User Equipment
TWAN Transport Wide Area Network
Tx Transmitter
UDP User Datagram Protocol
UDRE User Differential Range Error
UEE User Equipment Error
UERE User Equivalent Range Error
UHF Ultra High Frequency
UIVD User Ionospheric Vertical Delay
UIVE User Ionospheric Vertical Error
UNE User Navigation Error
UPS Uninterruptible Power Supply
UR User Requirements
UR/R User Requirements Review
URA User Range Accuracy
URD User Requirements Document
URE User Range Error
US United States or User Segment
USAT Ultra-Small Aperture Terminal (satellites terminal)
USRD User Segment Requirements Document
UTC Coordinated Universal Time
VAL Vertical Alarm Limit
VCB Verification Control Board
VDOP Vertical Dilution Of Precision
VHF Very High Frequency
VNSE Vertical Navigation System Error
VOR VHF Omnidirectional Ranging
VPL Vertical Protection Level
VRD Verification Requirements Document
VSAT Very Small Aperture Terminal
VTE Vertical Tropospheric compensation Error
VTS Vessel Traffic Surveillance
VUNE Vertical User Navigation Error
WAAS Wide Area Augmentation System
WAC Wide Area Correction
WAD Wide Area Differential
WADC Wide Area Differential Correction
WADGPS Wide Area Differential GPS
WBS Work Breakdown Structure
WD Wind Direction
WGS World Geodesic System
WGS-84 World Geodetic System
WIMP Windows Icons Mouse Pointer
WN Week Number
WP WorkPackage
WPD WorkPackage Description
WS Wind Speed