Did you ever wonder what those strange conglomerations of letters meant? Here's your chance to find out what those NASA acronyms stand for. About Space and Astronomy presents the Guide to NASA Acronyms. From Termination Check to Thrust Horsepower and Thrust Inlet Pressure to Thrust Vector Control Servoamplifier, you'll find them here. This page lists acronyms starting with T. For others, click on the appropriate letter above or below.

[T]

T: Temperature Rate
T: Superscript)
T: "Transformation (Matrix), Transpose (Matrix"
T: Throttle Command
T: Time
T: Talk/Monitor
T: Total Temperature
T: Top
T: Thermostabilized
T: Test
T: Temperature
T LSCP: Telescope
T&CD: Timing and Countdown
T&CP: Test and Checkout Procedure
T&D: TransPortation and Docking
T&E: Test and Evaluation
T&M: Time and Materials
T&O: Test and Operations
T+: Time Postintegration
T-: Time Prior to Launch
T-0: Time Zero
T-0: Takeoff
T. B.: Toggle Buffer
T.P.: Transition Period
T/A: Turnaround
T/C: Temperature Compensating
T/C: Thrust Chamber
T/C: Telecommunications
T/C: Termination Check
T/CAP: Thermal Capacitor
T/D: Time Delay
T/D: Touchdown
T/E: Transporter/Erector
T/L: Talk and Listen
T/L: Timeline
T/L: Transformer Load
T/O: Takeover
T/R: Transmitter/Receiver
T/R: Transmit/Receive
T/R: Tape Recorder
T/R: Technical Report
T/R: Transformer Rectifier
T/R: Transportation Request
T/R: Transmitter/Receiver
T/R: Transportation Request
T/R: Turnaround RequiremLnts
T/T: Terminal Timing
T/T: Timing/Telemetry
T/TCA: Thrust/Translation Control Assembly
T/V: Thermal Vacuum
T/W: Thrust Weight
T/W: Thrust-to-Weight
T/W: Thrust-to-weight
TA: Task Analysis
TA: Test Article
TA: Time Actual
TA: Travel Authorization
TA: Trunnion Angle
TAA: Temporary Access Authorization
TAA: Technical Assistance Agreement
TAC: "Kennedy Space Center Landing Site, Florida"
TAC: Tactical Air Command
TAC: Total Average Cost
TAC/RA: TACAN Radar Altimeter
TACAN: Tactical Air Navigation
TACAN: Tactical Air Command and Navigation System
TACAN: Tactical air navigation
TACH: Tachometer
TACO: Test and Checkout Operations
TAD: Temperature and Dewpoint
TAEM: Terminal Area Energy Management
TAEM: Terminal area energy management
TAG: Technical Air-to-Ground
TAGS: Text and Graphics System
TAIR: Test Assembly Inspection Record
TAL: Transatlantic Abort Landing
TAL: Transoceanic Abort Landing
TALAR: Tactical Approach and Landing Radar
TAM: Thermal Analytical Model
TAN: "Tananarive, Madagascar (STDN Site)"
TAO: Trans-Atlantic Abort
TAP: Total Air Pressure
TAP: Technical Achievement Plan
TAP: Telemetry Acceptance Pattern
TAP: Test Administration Plan
TAR: Technical Analysis Request
TAR: Test Agency Report
TAR: Test Action Requirement
TARC: TAS Telemetry Antenna Subsystem
TARC: Test Article Specification
TARC: True Airspeed
TARC: Through Axis Rotational Control
TASPR: TATI Total Air TemPerature Indicator
TASPR: Technical and Schedule Performance Report
TASPR: TAT Technical Acceptance Team
TASPR: Total Air Temperature
TASPR: Turnaround Time
TB: Talk Back
TB: Toggle Buffer
TB: Time Duration of Burn
TB: Time Base
TB: Terminal Board
TB: Terminal Base
TBA: To Be Announced
TBA: To Be Added
TBC: Terminal Buffer Controller
TBD: To Be Defined
TBD: To Be Developed
TBD: To Be Determined
TBE: To Be Evaluated
TBF: Test de Bon Fonctionnement (Spacelab)
TBI: Through-Bulkhead Initiator
TBN: To Be Negotiated
TBP: To Be Provided
TBS: Task Breakdown Structure
TBS: To Be Specified
TBS: To Be Superseded
TC: Telecommunications
TC: Temperature Compensating
TC: Test Conductor (Contractor)
TC: Test Conductor (Controller)
TC: Thermal Control
TC: Thermocouple
TC: Thiokol Corporation
TC: Thrust Chamber
TC: Time to Circular
TC: Traceability Code
TC: Tracking Camera
TCA: Thrust Chamber Assembly
TCA: Time of Closest Approach
TCA: Translation Controller Assembly
TCAB: Temperature of Cabin
TCC: Thermal Control Coating
TCC: Test Control Center
TCD: Test Completion Date
TCD: Test Control Document
TCE: Thermal Canister Experiment
TCF: Tank Checkout Facility
TCG: Test Control Group
TCG: Time Code Generator
TCI: Technical Critical Item
TCID: Test Configuration Identifier Document
TCMD: Transportation Control and Movement Document
TCN: Test Change Notice
TCN: Transportation Control Number
TCO: Test and Checkout
TCO: Taken Care of
TCOP: Test Checkout Pian(s)
TCP: Thrust Chamber Pressure
TCP: Task Control Packet
TCP: Test Checkout Procedure
TCP: Test Control Package
TCR: Thermal Concept Review
TCR: Test Constraints Review
TCR: Test Conductor
TCR: Test Compare Results
TCRSD: Test and Checkout Requirements Spec. Documentation
TCS: Thermal Control System (Subsystem)
TCS: Test Control System
TCS: Test Control Supervisor
TCS: Technical Concurrence Sheets
TCS: Technical Change Summary
TCSSS: Thermal Control Subsystem Segment
TCTI: Time Compliance Technical Instruction
TCTO: Time Compliance Technical Order
TCU: TaPe Control Unit
TCV: Thrust Chamber Valve
TCV: Temperature Control Voltage
TD: Technical Directive
TD: Test Director (NASA)
TD: Terminal Distributor
TD: Time Delay
TD: Touch Down
TD&SA: "Telephone, Data, and Special Audio"
TDD: Task Description Document
TDM: Time-Division Multiplexing (Multiplexer)
TDP: Tracking Data Processor
TDP: Temperature and Dewpoint
TDR: Technical Documentation Report
TDR: Technical Design Review
TDR: Test Discrepancy Report
TDRR: Test Data Recording and Retrieval
TDRS: Telemetry Downlist Receiving Site
TDRS: Tracking and Data Relay Satellite
TDRS: Tracking and Data Relay Satellite
TDRSS: Tracking and Data Relay Satellite System
TDRSS: Tracking and Data Relay Satellite system
TDS: Technology Demonstration Satellite
TDS: Test Data System
TDU: Time Display Unit
TDV: Test Data Van
TDY: Temporary Duty
TE: Test Equipment
TE: Time Earliest/Expected
TE: Timing Electronics
TE: Trailing Edge
TEC: Test Equipment Center
TECH: Technician
TECH: Technical
TED: Trailing Edge Down
TELCOM: Telecommunications
TELESAT: "TELESAT (Canadian Payload, Communication Satellite)"
TEMP: Test and Evaluation Master Plan
TEMP: Temperature
TEMS: Transport Environment Monitoring System
TEOS: Tetraethyl Orthosilicate
TEP: Test Evaluation Plan
TEP: Technical Evaluation Panel
TER: Time Estimating Relationship
TER: Test Equipment Readiness
TERL: Test Engineer Readiness List
TERL: Test Equipment Readiness List
TERM: Terminate
TESH: Technical Shop
TET: Test Evaluation Team
TF: Test Facility
TF: Test Fixture
TFC: Time from Cutoff
TFCS: Triplex Flight Control System (Subsystem)
TFE: Time from Event
TFF: Time to Free Fall
TFI: Time from Ignition
TFL: Telemetry Format Load
TFL: Time from Launch
TFOV: Total Field of View
TFR: Trouble and Failure Report
TFS: Telemetry Format Selection
TFU: Test Facility Utilization
TG: Ground Systems (KSC Directorate)
TG: "Ground Systems, TS"
TGA: Trace Gas Analyzer
TGA: Thermal Gravimetric Analysis
TGO: Time to Go
TGOWG: Teleoperator Ground Operations Working Group
TGS: Rate Gyro Assembly
TGS: Telemetry Ground Station
TGS: Telemetry Ground System
TGSE: Telemetry Ground Support Equipment
TGT: Target
THC: Translation Hand Controller
THC: Translational hand controller
THDS: Time Homogeneous Data Set
THEO: Theoretical
THERM: Thermal
THOLD: Threshold
THOUS: Thousarid
THP: Thrust Horsepower
THROT: Throttle
TI: Information Systems (KSC Directorate)
TI: Technical Integration
TI: Training Integrator (Integration)
TIC: Technical Information Center
TIC: Total Item Change
TICM: Test Interface and Control Module
TIFS: Total In-Flight Simulator
TIG: Time of Ignition
TIM: Technical Interchange Meeting
TIM: Time Interval Monitor
TIO: Target insertion orbit
TIP: Thrust Inlet Pressure
TIROS: ToPographical Infrared Operations Satellite
TIS: Test Interface subsystem
TK: Tank
TL: Transient Load
TL: Lot Traceability
TL: Thrust Level
TL: Time Latest
TLC: Telecommand
TLCE: Transmission Line Conditioning Equipment
TLM: Telemetry
TLM: Telemetry
TLS: Time Line Sheet
TLS: Top Left Side
TLSA: Torso Limb Suit Assembly
TLV: Transporter-Loader Vehicle
TLV: Threshold Limit Value
TM: Traffic Model
TM: Time Management
TM: Telemetry
TM: Technical Management
TM: Table Maintenance
TM: Member Traceability
TMB: Transportation Management Bulletin
TMBU: Table Maintenance Block Update
TMC: Test Monitoring Console
TMECO: Time of Main Engine Cutoff
TMF: Transporter Maintenance Facility
TMG: Thermal Meteoroid Garment
TMI: Technical Management Items
TMO: Tool Manufacturing Order
TMO: Test Manufacturing Order
TMP: Time Management Processor
TMP: Terminal Panel
TMPRY: Temporary
TMPV: Torquemotor Pilot Valve
TMR: Timer
TMU: Temperature Measurement Unit
TN: Technical Note
TNL: Tunnel
TNT: Trinitrotoluene
TO: Operations Management (KSC Directorate)
TO: Operations Management (TS)
TO: Takeoff
TO: Task Order
TO: Technical Order
TOC: Test Operations Center
TOC: Test Operations Change
TOC: Total Organic Carbon
TOF: Test Operations Facility
TOG: Toggle
TOI: Transfer Orbit Insertion
TOL: Tolerance
TOO: Test Operations Order
TOO: Threshold of Odor
TOP: Technical Operating Procedure
TOPS: Transistorized Operational Phone System
TOS: Test Operating System
TOT: Total
TOW: Tank and Orbiter Weight
TP: Training Plan
TP: Type
TP: Turbo Pump
TP: Test Procedure
TP: Test Point
TP: True Position
TP: Transition Period (T.P. preferred)
TP: Test Port
TP: Time to Perigee
TP&C: Thermal Protection and Control
TPA: Test Preparation Area
TPAD: Trunnion Pin Attachment Device
TPC: Telemetry Preprocessor Computer
TPDS: Test Procedures DeveloPment System
TPE: Test Project Engineer
TPF: Tug Processing Facility
TPF: Transfer Phase Final
TPF: Terminal Phase Finish
TPF: Terminal Phase Finalization (Braking)
TPI: Terminal Phase Initiation
TPM: Terminal Phase Midcourse
TPM: Transfer Phase Midcourse
TPM: Terminal Phase Maneuver
TPM: Technical Performance Measurement (System)
TPM 1: Terminal Phase Midcourse #1
TPM2: Terminal Phase Midcourse #2
TPO: Test Program Out@ine
TPR: Teleprinter
TPR: Test Problem Report
TPS: Twisted Pair Shielded
TPS: Test Preparation Sheet
TPS: Thermal Protection Subsystem
TPS: "Thermal Protection System (SR[3, ET, or Orbiter)"
TPS: Thermal protection system
TPSE: Thermal Protection Subsystem Experiments
TPUN: Test Procedure Update Notice
TR: Time to Retrofire
TR: Transportation Request
TR: Test Request
TR: Thrust Reverser
TR: Technical Report
TR/SBS: Teleoperator Retrieval/Skylab Boost System
TR2: Payload Furnished Mars Tape Recorder (2 of 2)
TRA: Turnaround Requirements Analysis
TRA: Training Requirei-nents Analysis
TRACS: Tool-Record Accountability System
TRAJ: Trajectory
TRANS: Translation
TRANS: Transition
TRANSL: Translation
TRB: Technical Review Board
TRB: Test Review Board
TRBL: Troubleshooting
TRCP: Tape Recorder Control Panel (LIO)
TRD: Test Requirements Document
TRF: Tuned Radio Frequency
TRI: Payload Furnished Mars Tape Recorder (1 of 2)
TRK: Track
TRKR: Tracker
TRL: Test Readiness List
TRN: Trunnion
TRNG: Training
TRQ: Torque
TRR: Test Readiness Review
TRRB: Test Readiness Review Board
TRS: Top Right Side
TRS: Tug Rotational System
TRS: Troubleshooting Record Sheet
TRS: Time Reference System
TRS: Teleoperator Retrieval System
TRSD: Test Requirements Specification Document
TRUN ANG: Trunnion Angle
TS: Serial Traceability
TS: Technical Support (KSC Directorate)
TS: Tensile Strength
TS: Test Site
TS: Test Stand
TS: Test Station
TS: Time Scheduled
TS: Timing System
TSA: Test Start Approval
TSAC: Tracking System Analytical Calibration
TSB: Temporary Stowage Bag
TSB: Twin Sideband
TSC: Test Setup Complete
TSC: Test Support Coordinator
TSC: Two-Stage Command
TSCION: TSC 1/0 Number
TSCO: Test Support Coordination Office
TSCO: Test Support Coordinator
TSCP: Training Simulator Control Panel
TSD: Test Start Date
TSE: Transportation Support Equipment
TSGP: Test Sequence Generator Program (ESTEC)
TSLD: Troubleshooting Logic Diagram
TSM: Trade Study Management
TSM: Tail Service Mast
TSM: Tail service mast
TSO: Time Since Overhaul
TSO: Time Sharing Option
TSP: Twisted Shielded Pairs (Cables)
TSP: Test Software Program
TSR: Technical Status Review
TSR: Test Status Report
TSRA: Total System Requirements Analysis
TSS: Time Sharing System
TSS: TPS Summary Sheet Control
TSS: Tug Structural Support
TSSU: Test Signal Switching Unit
TST: Test
TSU: Time Standard Unit
TSW: Test Software
TSW: Test Switch
TT: Total Time
TT: Terminal Timing
TT: Thrust Termination
TT: Total Temperature
TT&C: Tracking Telemetry and Control
TT&C: "Tracking, telemetry and command"
TTA: Time to Apogee
TTA: Thermomechanical Test Area
TTC: Time to Circularize (Orbit)
TTC: "Telemetry, Tracking, and Command"
TTC: Tunnel Thermal Control
TTCA: Thrust Translation Controller Assembly
TTCV: "Tracking Telemetry, Command, and Voice"
TTE: Time to Event
TTE L: Tool and Test Equipment List
TTG: Time to Go
TTL: Transistor-Transistor Logic
TTLM: Through-the-Lens Light Metering
TTP: Time to Perigee
TTU: Timing Terminal Unit
TTV: "Termination, Test, and Verification"
TTY: Teletype
TU: Transport Unit
TU: Technical Utilization
TU: Technology Utilization
TUL: "Tula Peak, NM (STDN site)"
TURB: Turbine
TV: Transport Vehicle
TV: Television
TV: Thermal Vacuum
TV: Thrust Vector
TVA: Thrust Vector Alignment
TVAR: Test Variance
TVC: Thermal Vacuum Chamber
TVC: Thrust Vector Control
TVC: Thrust vector control
TVCA: Thrust Vector Control Actuator
TVCD: Thrust Vector Control Driver
TVCS: Thrust Vector Control System
TVEXPIS: TV Experiment Interconnecting Station
TVN: Test Verification Network
TVP: Test Verification Program
TVS: Toxic Vapor Suit
TVSA: Thrust Vector Control Servoamplifier
TVSSIS: TV Subsystem Interconnecting Station
TVT: Thermal Vacuum Test
TVTA: Thermal Vacuum Test Article
TW: Tailwind
TW: Thumbwheel
TW: Time Words
TW: Traveling Wave
TWD: Twisted Double Shielded
TWL: Total Weight Loss
TWR: Tower
TWT: Traveling Wave Tube
TWT: Trisonic Wind Tunnel (Rockwell)
TWTA: Traveling Wave Tube Amplifier
TWX: Teletype Wire Transmission
TX: Translation Hand Controller X-Axis Direction
TX: Transmit Channel
TX/RX: Transmitter/Receiver
TY: Translation Hand Controller Y-Axis Direction
TYP: Typical
TZ: Translation Hand Controller Z-Axis Direction
Tll: Tooling Inspection Instrumentation

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