GNSS Glossary

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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

TTFF :

Time to first fix

TUE :

Test User Equipment

TWAN :

Transport Wide Area Network

Tx :

Transmitter

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