航空缩略语词典

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MDA GLOSSARY, VER. 4.0 T 298 Theater Missile 3 t* P) `1 e' M, F# U! W, d# qDefense Council (TMDC) A consultative body for considering TMD family of systems planning and 0 s" ?# @) S3 I* Jprogramming issues; chaired by an Assistant to the MDA Deputy for 1 a% @: s; J$ ]$ j, P5 M# vAcquisition/TMD, membership includes MDA TMD Directors, representatives of each applicable Service Program Executive Officer, and TMD Executive Agents % e+ t; P0 q* ` aand Program Managers. Theater High Altitude Area 4 b% t- _* u9 ?" e2 }: ?, t# ODefense System 0 n3 ~0 j5 z" C" I" {. e(THAAD) r; }* x: y: WA ground-based, air transportable interceptor system that will provide wide area defense capability by intercepting longer-range missiles at higher altitudes and at / C( j$ ^7 U& g: Z& G; I) Tgreater distances. Will provide an overlay or upper tier to point defenses such as PATRIOT. 0 w% o: P& u6 v3 D0 q6 k% e1 MTheater Missile " M1 V$ E( }! V3 s, D9 Y& ?: n6 ]7 w(TM) 8 q5 d1 l* D6 x: L3 u1 ?% _# TA theater missile (TM) is a ballistic missile (BM), cruise missile (CM), or air-tosurface guided missile (ASM) whose target is within a theater or which is capable of attacking targets in a theater. 6 N ^ L) y2 x% x0 g- ^+ XTheater Missile Defense (TMD) OBSOLETE. The strategies and tactics employed to defend a geographical area outside the continental United States against attack from short-range, intermediate-range, or medium-range ballistic missiles. Theater Missile - o( p5 n k! Y+ z2 a6 KDefense Ground- Based Radar ; S4 A) F+ x" ?( P, G: r(TMD-GBR) ( E5 ^+ y& |$ |+ r* F RA ground-based, air transportable sensor that provides search, tracking and discrimination capabilities for the THAAD interceptor system. Also referred to as THAAD Radar. Theater Missile Defense Initiative (TMDI) 0 R/ A$ [: r/ z1 R$ \4 w2 Y- bAn initiative under which all DoD theater and tactical missile defense activities are carried out. Section 231 of the National Defense Act for Fiscal Year 1993 (Public Law 102–484) directed establishment of a TMDI office within the DoD. THEL Tactical High Energy Laser. Thermal Energy Electromagnetic energy emitted as thermal radiation. The total amount of . {( F7 Y6 e; v; {8 V, a$ Cthermal energy received per unit area at a specified distance is generally expressed in terms of calories per square centimeter. ! w$ V$ J9 `6 w, PThermal Imagery Imagery produced by sensing and recording the thermal energy emitted or . h1 y/ [2 ~* C J0 o: Yreflected from the objects, which are imaged. Thermal Kill The destruction of a target by heating it, using directed energy, to the degree that structural components fail. Thermal Management " B2 i3 T) |, m$ QTechnologies/techniques associated with the control and management of / O( C) ?, h3 V% C X ^ X9 y" p. Wthermal energy, its generation, dissipation, and recovery. 6 [ f' H s9 `; u4 WThermal 7 X6 b4 K, a+ w3 d( t, x2 `% vRadiation Electromagnetic radiation emitted (in two pulses from a nuclear air burst) from the / [. M0 I+ G, L, O. y! J/ v5 I$ \fireball as a consequence of its very high temperature; it consists essentially of # F1 n+ `+ j6 k; G- c6 _% Wultraviolet, visible, and infrared radiations. Thermal X-Rays The electromagnetic radiation, mainly in the soft (low energy) x-ray region, : i4 D s' G9 @$ V! \, g! Z9 iemitted by the nuclear weapon residue by virtue of its extremely high 2 q% C0 G( e; [8 n, ttemperature; it also is referred to as the primary thermal radiation. It is the 3 q2 _( }+ Q# Yabsorption of this radiation by the ambient medium, accompanied by an increase 6 g, b/ \" K- q6 F7 ?2 `in temperature, which results in the formation of the fireball (or other heated region) which then emits thermal radiation. (See X-Rays.) MDA GLOSSARY, VER. 4.0 T 299 4 w' w0 \# M+ SThermosphere The atmospheric shell extending from the top of the mesosphere to outer space; ; I8 f* I: u: Y7 O+ V: wit is a region of more or less steadily increasing temperature with height, starting at 40 to 50 miles (70 to 80 kilometers); the thermosphere includes, therefore, the exosphere and most or all of the ionosphere. Threat : S3 e8 k o: CCharacterization 1 N, j) a- u: k" K! T; cAn assessment of the nature, magnitude and intent of an attack in progress. Threat Corridor (Threat Tube) A tube containing all the objects originating from launch sites and aimed at targets whose spacing is close enough to permit the tube around the object 5 S0 a! \7 U' @7 g( ttrajectories to be represented by a single trajectory in battle management 2 k. K( S% [5 I {$ _$ L/ R$ R, Ccomputation. 8 [0 _( _. |, W2 W5 ZThreat Scenario A hypothetical example of the employment of threat systems against ballistic 4 x$ P2 ]4 c8 Z ^/ \% ]missile defenses for the purpose of analysis and evaluation of those defensive systems and architectures. Threshold Performance capability or characteristic level in terms of a minimum acceptable # m/ i$ l- D1 n$ v0 ~! }value (threshold) required to satisfy the mission need and a performance objective. 0 b5 g8 [* G3 g; X& J2 N+ XThreshold , z8 J: q& I" S1 sDefense & ~# q, U. H, L# I, o0 F- u+ s& `A defense strategy that concedes that the target can be destroyed at a price % E* T9 n7 P# U6 c( z0 u9 Kthat is not prohibitive, but the presence of the defense is thought to require the offense to mount a relatively large and complex attack. Throw Weight All weight in an interceptor, above the sustainer, which serves as the kill vehicle. ; P8 ~% M, D, H a* |9 aThrusted Replicas (TREPS) 7 N! A4 ~3 v& K c- y; O5 bConical decoys equipped with a miniature rocket device. Generally used to change the decoy’s optical signature to resemble that of an RV in the reentry & \- U' Q! X' O8 |3 r- o) Uphase. TI (1) Technical Instruction. (2) Technology Insertion. $ S# j2 D3 C `* t6 mTIARA Tactical Intelligence and Related Activities. 9 Z9 P+ J0 c; E. aTIBS (1) Theater Information Broadcast Service. (2) Tactical Information Broadcast System. 3 J. t7 }/ G$ }5 R0 M(3) Theater Intelligence Broadcast System. TIC (1) Thermionic Integrated Circuit. (2) Technical Information Center. 9 V+ w0 Y2 Y( f% O3 S; F% TTIDP Technical Interface Design Plan. $ x0 P% r }$ S6 j1 Y9 _6 RTIE (1) Technology Integration Experiments. (2) Technical Independent Evaluation. Tier An integrated set of SDS elements that address a particular phase of the threat 1 r6 ]/ r0 O9 S(e.g., boost phase). : k3 m* P/ \& j _3 A/ k3 K9 d4 `# K) qTiered Defenses The use of defensive systems at different phases of the missile trajectory. ) I( }! H% c$ u$ WTIES Technology Integration Equipment System. ' [+ j- Y2 @6 m3 o5 E- tTIIAP Telecommunications and Information Infrastructure Assistance Program. TIL Technical Insertion Laboratory. TIM Technical Interchange Meeting. $ ]# Y l% K: U! X5 k% v( uMDA GLOSSARY, VER. 4.0 T 300 Time-Phased Force and Deployment List & t0 c$ [: O" S7 AAppendix 1 to Annex A of the operation plan. It identifies types and/or actual units required to support the operation plan and indicates origin and ports of debarkation or ocean area. ; [1 L+ B' _1 K; u" XTime of Flight * `8 k( P9 O) u# ^9 N(Max) 4 ?. U3 R- t; O- i' I' ZThe maximum time for a booster or vehicle to perform its function from time of # w3 l: l- c. \" W R! {! d5 Blaunch. Time on Station The time the sensor is in its operating position. Time Sensitive 6 C! M; f4 u( U' B8 E5 uTargets 3 N& q( {7 \) J. N5 cThose target requiring immediate response because they pose (or will soon pose) a clear and present danger to friendly forces or are highly lucrative, fleeting targets of opportunity.

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Time to Station The time required to move a sensor to its operating position. TIMS Training Integration Management System (USAF term). , Q7 r( }, f, d- F3 l% f4 Z, rTIN Theater Intelligence Networks. , M' T1 E/ l! j( C4 N* ~TIP TOPAZ International Program. & ?$ K0 b p5 \. H" K: s+ fTIR OBSOLETE. Terminal Imaging Radar. (Predecessor to Ground-Based Radar Terminal (GBRT).) 2 `: L1 h8 ~" N5 Z6 p9 Y0 f7 ?2 ZTIRS Telemetry, Instrumentation and Range Safety TIS (1) Trusted Information Systems, Inc. (2) Technical Information System. & l. _ L% C7 t* N5 l6 C6 v, k. oTitan USICBM. TIU TIBS/Tactical Interface Unit. TIWG Test Integration Working Group. (U.S. Army) ; Z- j1 B9 C* L" dTL Team Leader. 8 U9 N# g4 Y4 k( {/ o. ?TLA Time Line Analysis. 8 N L. X+ s! W. }( K" [4 o) G; wTLAM Theater land Attack Missile. $ ^% [! c2 s: q, r7 o% I3 w6 [TLAM/D TLAN [with submunition] Dispenser (Navy term). : y0 R6 z8 _" E' |TLDD Top Level Design Document. TLV Target Launch Vehicle. TLX Teletype. K7 Q3 c0 I' c: I8 ]TM (1) See Theater Missile. (2) Technical Manual. (3) Tactical Missile (US Army term). TMCC Test Monitor and Control Center. 0 D6 a4 |# y7 Y1 u$ M8 mTMD See Theater Missile Defense. TMD C2 Theater Missile Defense Command and Control. {# v) J: }- _) M9 R+ XMDA GLOSSARY, VER. 4.0 T 301 TMD C 3 I Those assets that provide connectivity between and among Theater Ballistic Missile Defense forces. 9 k( F: |& J9 V9 [3 nTMD ESM Theater Missile Defense Existing System(s) Modification (MDA term). 1 d8 E- J) ]# W1 }4 o) R' zTMD GBR See Theater Missile Defense Ground Based Radar (THAAD Radar). + j; g2 P" V# dTMD IA Theater Missile Interoperability Architecture. 3 E" l: g' T8 y/ E& K' [* E$ ~& OTMD ITP TMD Integrated Test Plan. u6 _) e7 P9 V1 \0 {TMDAS Theater Missile Defense Architecture Study. - x: M: Q& P5 E1 ]' J! ?- fTMDC Theater Missile Defense Council. + o/ G( B$ H. L' z0 |" PTMDE Test Measurement and Diagnostic Equipment (ILS term). ; P5 e. A5 p" F# n( | ], {" TTMDI See Theater Missile Defense Initiative. . [: A2 ~; o! BTMDSE Theater Missile Defense System Exerciser. TMMM TOMAHAWK Multi-Mission Missile. TMP Technical Manual Plan (ILS term). 3 g: ~9 R$ y% Q Q- N+ BTMPCU Tomahawk Theater Mission Planning Center Upgrade. % o0 A1 s0 ]% b( jTN (1) Terrestrial Network (C2E term). (2) Thermonuclear. TNF Theater Nuclear Forces [Treaty term]. TNT Trinitrotoluene. TNW Theater Nuclear Weapon. , i- K" D6 [7 L) ETO (1) Task Order. (2) Technical Order. TOA Total Obligation Authority. 4 x) B+ E2 m, x! }" |TOAM Tactical Air Operations Module. TOC Tactical Operations Center. TOE Table of Organization and Equipment. : W" [& T7 u- K( ETOF Time of Flight. % y9 i( i$ s/ K# i lTOI Track of Interest. # M& k8 _9 l0 r3 \2 Z8 CTOIA Task Order Impact Analysis. 9 `0 B4 u3 l" k" B% C0 K |Tolerance The ability of a system to provide continuity of operation under various abnormal & }) E. h# e) p6 }: v9 zconditions. TOM See Target Object Map.

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Tomahawk US ground launched cruise missile. 7 b: s, j) U0 Q8 \" N& A! TMDA GLOSSARY, VER. 4.0 T 7 w! L* x7 |' D% V302 # ]# q; a/ {, ^+ h1 mTOMD Task Radar Management Details. & i7 h3 t5 O5 k7 qTOMP Task Order Management Plan. TOMS Total Ozone Mapping Spectrometer (NASA term). TOO Target of Opportunity. TOOL Target of Opportunity Launch. % ^/ R* e8 O0 X' \2 x; |1 T& \TOP Task Order Plan. - `- U- }/ I! U0 Q7 }$ K9 M( uTop-Down Pertaining to an approach that starts with the highest-level component of a hierarchy and proceeds through progressively lower levels; for example, topdown design, top-down programming, top-down testing. Contrast with bottomup. Top-Down Design The process of designing a system by identifying its major components, 3 ~6 A) ~6 b! |: P2 a# y0 Z: q/ Xdecomposing them into their lower level components, and iterating until the desired level of detail is achieved. 5 |- S0 ^# j' p; t4 Q/ u2 D/ d* o0 B) iTop-Down $ @# P; q7 X6 a" f5 f- ^9 J0 Y! n: nTesting The process of checking out hierarchically organized programs, progressively, from top to bottom, using simulation of lower level components. 9 h2 |6 s& D6 L& A Z' Y4 hTOPAZ A project to demonstrate the transfer of Russian thermionic space nuclear power - h. e( U, U) U7 x y* s% itechnology to U.S. BMD applications. 9 S& p/ g7 h: _5 T0 F% \4 w' k3 E6 u- oTOR Terms of Reference. % ]6 U5 r1 l; i8 aTOS (1) Tactical Operations Shelter (Station). (2) Task Order Status. J1 k2 R$ |1 r3 {: g9 L( Z/ ^TOT Time on Target Total Obligation - y6 l/ @ O/ G4 B* vAuthority (TOA) A DoD financial term, which expresses the value of the direct program for a given fiscal year. $ [6 y1 Z) Y8 g; Z1 C, q* F2 g' qTotal Quality Management 7 e. w8 W& Y2 a7 K8 Y(TQM) : S6 Q# w6 D' }; ? vA management philosophy committed to a focus on continuous improvement to % o2 L9 ~( E, E+ mproduct and services with the involvement of the entire workforce. 8 f8 G' G' n _7 tTOTS Target Oriented Tracking System TOVS TRIOS Operational Vertical Sounder. ; L h# R9 K8 s( z) O, x5 NToxicity The kind and amount of poison or toxic produced by a microorganism, or , D) f0 ~2 r" }9 L V8 q# S$ v$ Ipossessed by a chemical substance not of biological origin. TP (1) Telenet Protocol (Telecomm/Computer term). (2) Test Program. TPALS Theater Protection Against Limited Strikes. - l' l: H+ U* l' ETPBM Terminal Phase Battle Manager. ) Q$ b- D8 I; Y- K4 Z6 V! B1 aTPD Mobile Tactical Radar (US). % P1 p0 K* r0 t( tTPDR Total Processing Data Rate (TelComm/Computer term). MDA GLOSSARY, VER. 4.0 T 303 TPEC THAAD Performance Evaluation Center. TPEM Technology Program Element Manager (SDIO/MDA term). 0 @% `; R d' T$ D' dTPFDD Time-Phased Force Deployment Data. TPFDDL Time-Phased Force Deployment Data List. * N. G& q5 O, ]) @0 B; k. |/ D& HTPFDL Time-Phased Force Deployment List. TPM Technical Performance Measurement. 8 r) ~0 ~' V' S8 B I0 c! JTPMT Total Preventative Maintenance Time (ILS term). TPO (1) Test Planning Organization. (2) THAAD Program Office # X) k' x* t2 ~/ F4 xTPP Test Procedure Plan. TPR (1) Terminal Phase Radar. (2) Trained Personnel Requirements. (3) Target Performance Report. TPS Thermal Protection System. * e% `- Z0 i1 X! k; R" XTPT Theater Planning Tool. TPWG Test Planning Working Group. (U.S. Air Force) 0 R& a) ?' E6 sTQM Total Quality Management. , A, f! G8 p; H. o, j% ATraceability (1) The characteristic of software systems or designs or architectures or 9 Z9 K& e' T. xdomain models that identifies and documents the derivation path ! H7 r' `; m$ n9 j r(upward) and allocation/flowdown path (downward) of requirements and % b/ j0 [3 i/ t2 uconstraints. (2) The degree to which a relationship can be established between two or more products having a predecessor-successor or master-subordinate " x1 C- n) a9 C& i& `relationship to one another.

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Track (1) A series of related contacts displayed on a plotting board. ' Z: N4 C5 C0 m, x2 F(2) To display or record the successive positions of a moving object. 0 C' h3 `1 a) U(3) To lock onto a point of radiation and obtain guidance from. ' L2 j% _/ W6 S4 Z$ y(4) To keep a gun properly aimed, or to point continuously a target locating $ y4 V; R& T8 x' K9 h& Sinstrument at a moving target. (5) The actual path of an aircraft above, or a ship on, the surface of the earth. Track 5 ^# n9 N4 A( F+ }# B ]& H( WAssessment The Track Assessment looks for anomalies in an object’s track data. An anomaly in the track may indicate a hit. 3 S$ x& a3 |! x/ q. |0 UTrack, Birth to Death The maintenance of an associated track through all phases of flight (i.e., boost 2 x1 Q1 e0 i7 x1 t- p$ a8 m: ^; [to reentry). $ E; r; J' B# _Track Correlation The combining of track information for identification purposes, using all available " w! `1 `, u+ P: {data. Track Extension This term usually applies to improvements in track estimates by use of new data. It is sometimes used to describe a process of target extrapolation to a future time or place (e.g., reentry). H6 j$ Y2 u' F8 f; i) k3 wMDA GLOSSARY, VER. 4.0 T # Y1 Q9 @; R( P! {304 Track File A target’s stated estimate, confidence, covariance matrix, and associated LOS measurements with irradiances with confidence of association; or some subset of the above. Track File-Track History A set of individual track reports on a particular object, which taken together / i n3 g! t j: |produce useful approximation of that object's future position in space. 7 j' ], ?3 ^& [+ v' Z G6 _$ JTrack Formation The process of determining the track or tracks of detected objects. It is usually a - j8 k" K: i8 \7 ithree-step process of data association, track initialization, and track improvement 3 t9 Z8 H& W$ i9 b3 q" Q5 b/ gby filtering. Tracking The act of generating and maintaining a time history of an object's position and any other features of interest. Tracking and Pointing ; K1 U) ^4 ^4 @9 ZOnce a target is detected, it must be followed or “tracked”. When the target is successfully tracked, a weapon is “pointed” at the target. Tracking and pointing " |# f- I4 w4 z/ G$ {* \$ lare frequently integrated operations. / e# F. A7 Q! d# N2 W0 `2 G4 B) s8 |Tracking Range ' N8 B. ?- \5 m% ~; f/ T(Max) The maximum line of sight distance at which a sensor can maintain track of an 8 Z6 N$ u6 l! c' }1 eobject. Track Initiation The formation of the first or initial estimate for a sensor system of the state vector of an object. The process typically requires observation from a number of . g. {! @$ m& [, uframes. ) V" c, r; t( [6 Q& ]. cTrack Production Area An area in which tracks are produced by one radar station. * @8 u8 Y2 I+ Z7 a$ uTrack Symbology Symbols used to display tracks on a data console or other display device. Track Telling The process of communicating air surveillance and tactical data information * g$ o, t1 S! G/ m/ fbetween command and control systems or between facilities within the systems. ' T( U8 ~4 `! N5 I1 K. W8 R- h4 ATelling may be classified into the following types: back tell; cross tell; forward tell; lateral tell; overlap tell; and relateral tell. TRADEX Target Resolution and Discrimination Experiment. TRADOC U.S. Army Training and Doctrine Command, Ft. Monroe, VA. Traffic Capability Maximum The maximum number of objects per unit time which the sensor system can maintain track files. : K* r i( c4 [* P, iTraffic Decoy Decoy that matches RV characteristics in the exoatmosphere and high + D2 }- K5 e: P: T+ g5 Y/ Nendoatmosphere. 1 H$ T% ]( @; w! QTrain Threat geometry with objects placed in a line (string) along the velocity vector of - Y+ q& y1 i N' J Y- oreentry. Trajectory The curve described by an object moving through space. Trajectory Histories 4 u7 o: z& g/ S; q# |$ rTrajectory information on targets recorded over a period of time. TRAK A data base management system (not an acronym). 7 a s! E! T. d# h" RTrans-Attack Period from first tactical indication of attack until termination started, i.e., postattack. MDA GLOSSARY, VER. 4.0 T 0 G2 \5 n& E% s' k& H9 R305 TRANSCOM [U.S.] Transportation Command, Scott AFB, IL. TRANSEC Transmission Security. - `+ }+ V7 _& q* }Transition The period in which the world strategic balance would shift from offensedominance to defense-dominance. Transition to Production A risk reduction process during which the program shifts (passes) from development to production. It is not an exact point, but is described as a process consisting of disciplined engineering and logistics management to 5 E! V( W& Z# K( B5 c: Tensure the system is ready for manufacture. (See DoD 4245.7-M.) ! ?1 B k. N! T. `( y! W% VTransmission Security . W- x& I- C# ?8 }4 V! L. M(TRANSEC) / u$ Q1 M) R' ]2 XThat component of security, which results from all measures, designed to protect " w6 t; R7 e! e0 L! ]% pcommunications transmissions from interception and traffic analysis. (See COMSEC.)

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Transonic Of or pertaining to the speed of a body in a surrounding fluid when the relative 7 O6 P: P" ?. a+ T& ~3 Bspeed of the fluid is subsonic in some places and supersonic in others. This is encountered when passing from subsonic to supersonic speeds and vice versa. % P1 d9 b4 S5 c$ U/ H6 r8 W( l2 sTransponder A receiver-transmitter that will generate a reply signal upon proper interrogation. - t) c' h& y8 w+ } q' e \' DTRAP Tactical Receiver and Related Applications. 9 O* _/ Y8 o3 l/ E( @! ]) V: s/ JTrap Door A hidden software or hardware mechanism that permits system security 1 a2 _7 O5 I* ^# mmechanisms to be circumvented. Traveling Wave ! o2 n. n% j6 W. g" S$ ?Tube (TWT) # u/ Z% y' Q( i" J. CAn electronic tube in which a stream of electrons interact continuously or + h- b! H4 N7 u* Z1 j- Erepeatedly with a guided electromagnetic wave moving substantially in synchronism with it, in such a way that there is a net transfer of energy from the * P: W3 G3 C& p% A7 F; G! m% dstream to the wave; the tube is used as an amplifier or oscillator at frequencies in $ f6 t5 L9 _: R2 ~1 ^7 {' z7 a2 D5 G) kthe microwave region. 2 J, K2 k% Y: M. gTraverse (1) To turn a weapon to the right or left on its mount. (2) A method of surveying in which lengths and directions of lines between . M# _' M) C Wpoints on the earth are obtained by or from field measurements, and used in determining positions of the points. Traverse Level That vertical displacement above low-level air defense systems, expressed both ! c1 o7 ?: I4 qas a height and altitude, at which aircraft can cross the area. TRB Tactical Review Board. TRD Technical Requirements Document. TRE Tactical Receive Equipment. TREA Transmit/Receive Element Array (THAAD). / l5 H9 M$ |3 \4 w5 j( \TREE Transient Radiation Effects on Electronics. TREM Total Radiation Environment Model. TREPS See Thrusted Replicas. TRESIM Tactical Receive Equipment Simulator. MDA GLOSSARY, VER. 4.0 T 306 TRG Threat Reference Guide. 5 x! G: w; `0 q! _TRI-TAC Tri-Service Tactical Digital Communications System. TRIDENT Class of US ballistic missile submarines (USN term). TRIDENT I (C-4) US SLBM (USN term). % u! r2 i$ X, w2 k4 GTRIDENT II (D-5) US SLBM (USN term). 4 D2 i$ ~5 L5 _" b7 }# i# nTRIM Toxic Reduction Investment and Management. TRM Technical Reference Model. TRMP Test Resources Management Plan. / E }1 S2 [6 ITRN (1) Task Requirements Notice. (2) Test Requirements Notification. Trojan Horse A computer program with an apparently or actually useful function that contains additional (hidden) functions that surreptitiously exploit the legitimate authorizations of the invoking process to the detriment of security or mission performance. TROPO Tropospheric Scatter. + G& Y# F, w1 C3 \8 KTropopause The imaginary boundary layer dividing the stratosphere from the lower part of the 9 h+ H8 ?/ l( O3 K# T4 _atmosphere, the troposphere. The tropopause normally occurs at an altitude of about 7.62km to 13.71km in polar and temperate zones, and at 16.76km in the tropics. (See Stratosphere, Troposphere.) 3 K% h! @" _( E v, W( y5 ]Troposphere The region of the atmosphere, immediately above the earth's surface and up to the tropopause, in which the temperature falls fairly regularly with increasing altitude, clouds form, convection is active, and mixing is continuous and more or less complete. Tropospheric Scatter / i w# L" ~- ]3 ]& E0 a: tThe propagation of electromagnetic waves by scattering as a result of irregularities in the physical properties of the troposphere. ! C5 h+ t5 A" v+ z" [TRP (1) Test Readiness Program. (2) Technology Reinvestment Program. . f8 e# E$ D4 e7 x# a8 z" |0 _(3) Technology Readiness Program (pre-acquisition program status). (4) Technical Requirements Package. TRPC Technology Readiness Planning Committee. TRR Test Readiness Review. Trusted : T8 E" ^3 `% Y9 MComputer System/Software A system or its software that employs sufficient hardware and software integrity ! E# w1 U& u2 z; Omeasures to allow its use for processing sensitive or classified information. Trusted Path A mechanism by which a person at a terminal can communicate directly with the . q1 S. o8 C3 t( cTrusted Computing Base. This mechanism can only be activated by the person 5 v) j1 A( v" r; Kof the Trusted Computing Base and cannot be imitated by un-trusted software. TRW TRW, Inc. TS (1) Terminal Service. (2) Top Secret. $ h$ _6 b& w u+ DMDA GLOSSARY, VER. 4.0 T 8 C, i+ N! y- d6 F+ Q% ]307 TSA Technology Security Analysis. TSD Tactical Surveillance Demonstration. TSCM Tomahawk Strike Coordination Module (USN term). 1 k" \! e4 d2 c6 ]4 J2 JTSD Tactical Surveillance Demonstration. TSDE Tactical Surveillance Demonstration Enhancement. TSEU Technology Seeker Evaluation Unit. - s' k! I+ u# N$ ]TsIAM Moscow’s Central Institute of Aviation Motors. " G+ D9 s4 k) ETSM TRADOC System Manager. TSMA Theater of Strategic Military Action. 2 f& g3 W. E" {. K! s/ nTSP Target Support Plan. TSPI Time, Space, Position Information. TSR Target System Requirements.

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TSRD Target System Requirements Document. % I0 K1 P( B6 l4 H* QTSS Terminal Surveillance Sensor. TSSAM Tri-Service Standoff Attack Missile. TSWG Target Signature Working Group. TT Total Time. ! A0 k/ }3 c0 |3 `& {- c& ZTT&C Telemetry, Tracking and Command. TT&E Technical Test and Evaluation (Army). / V% c5 a4 x) `TTA Total Time Accounting. $ V0 P* h0 s% H P# Z5 N5 cTTBM Terminal Tier Battle Manager. - B$ [ S9 h2 `& n. A. c9 I( j1 {TTBT Threshold Test Ban Treaty. 0 q7 i" N* j. h* UTTD&D Test Technology Development and Demonstration. A portion of the CTEIP ) n* y M9 U1 A, k; S. Iprogram, which funds the development and demonstration of technologies, * o" A: k0 \$ E6 {which have significant potential for improving testing. TTEL Tools and Test Equipment List (ILS term). TTL Transistor-to-Transistor Logic. / c4 g" Y; u- s9 Y" }TTP Tactics, Techniques, and Procedures. TTSARB Technology Transfer and Security Assistance Review Board. TTT Test Technology Transfer. MDA GLOSSARY, VER. 4.0 T 1 x) I4 R8 o. ] d0 _9 ?308 6 A; f# y2 F7 l9 R- i. \6 i3 t6 ~. `TTV Technology Test Vehicle. . S- m8 {0 q( F4 JTTY Teletype. TUG TRACE User Group. 9 k J8 }; \/ l9 R0 [; b# YTV Thrust Vectoring (rocker engineering term). TVC Thrust Vector Control. TVE Technology Validation Experiment. 0 N2 q5 ]* ^; f% k7 H: HTVM Track-via-Missile. TVV Technology Validation Experiment. TW Tactical Warning. TW/AA See Tactical Warning/Attack Assessment. TW/SD Tactical Warning and Space Defense. TWG Technical Working Group. 1 o# i) G( x8 YTWS TOMAHAWK Weapons System (USN term). " a. P8 j! S; p b) xTWT Traveling Wave Tube. ( N* O q+ R6 c6 j; `5 OTWTA Traveling Wave Tube Amplifier. (Electronic Engineering term). TY Then Year (PPBS term). 3 G) N8 l" x3 F9 `TY$M Then Year Dollars Millions. : f" p: Z6 I/ T5 G, Z8 ` a+ aType A - System Specification States all necessary requirements in terms of performance, including test provisions to assure that all requirements are achieved. Essential physical - I- m7 ?2 s* }/ `: n3 T4 f5 j9 Bconstraints are included. Type A specifications state the technical and mission requirements of the system as an entity. ( q6 K1 x) x$ L( ^) e: v8 m+ WType B - ' b9 s+ s- q; z- [6 e+ f1 PDevelopment ) X" k2 U' }3 qSpecification States all necessary requirements in terms of performance. Essential physical constraints are included. Type B specifications state requirements for the development of items other than systems. They specify all of the required item functional characteristics and the tests required to demonstrate achievement of those characteristics. 7 i6 P$ u- g% K! R& R7 G/ d& w0 GType C - Product Specification 3 u, K6 r# g: u) s! eProduct specifications are applicable to any item below the system level, and may be oriented toward procurement of a product through specification of % Q& F) B6 f+ @; m& h% kprimarily function (performance) requirements or fabrication (detailed design) requirements. Type C specifications intended to be used for the procurement of items including computer programs. Typhoon Class of Soviet ballistic missile submarines. Typing The act of recognizing objects by measuring a set of observables, computing a set of characteristics, and associating the characteristics with a specific class of + w" o; ~" e1 S6 F: o% `: F7 E* ~objects (i.e., SS-18, SS-24). MDA GLOSSARY, VER. 4.0 U + U3 c2 J6 c1 R2 E3 x. `309 U Uranium. $ D9 C& |* t7 x2 C& z0 VU&S Unified and Specified [commands] (pre-1996 term). U.K (UK) United Kingdom. U.S. (US) United States. U.S. West U.S. West Incorporated. U.S.S.R. Union of Soviet Socialist Republics. ! A* M" `' f: I) mUA User Assessment (NMD BMC3 term). 7 A0 _! M9 V( _UAE United Arab Emirates. ) U& H: H! @0 k9 f/ C7 T* S6 U$ TUAV Unmanned Aerial Vehicle. + [7 g j& R9 _6 ]- _4 F. B- LUAV BPI Unmanned Aerial Vehicle-based Boost Phase Intercept. ) h0 n! H8 H2 i+ ~- c* LUCAP UAV Combat Air Patrol. UCC Uniform Commercial Code (US legal term). ; g& o, i5 K2 O& d/ ^UCP Unified Command Plan. UD/ASD United Defense/Armaments Systems Division. # H: G7 l, S9 T0 @7 GUDMH Unsymmetrical Dimethylhydrazine (a liquid propellant rocket fuel). UDS Universal Documentation System. A standardized comprehensive tool for stating - c. V- c6 ]- A: j; X7 y4 ^4 c0 _and coordinating program requirements for testing MRTFB ranges, as well as the capabilities and plans of test ranges to support program requirements. It , Z7 ^# l% U$ X* b; Xconsists of a series of six planning and execution documents: 10 are the Program Introduction (PI) (also called the Program Introduction Document (PID)), " H7 @; o- g# H5 u; U8 W- M- E2) Statement of Capability (SC), 3) Program Requirements Document (PRD), 4) 1 F0 p5 Q' N$ b) {4 o* M* m$ T/ IOperations Requirements (OR), 5) Program Support Plan (PSP), and 6) the - |$ O' C8 v- f _# ~Operations Directive (OD). The UDS was developed and is regulated by the 7 m, w9 X/ M6 T, J# ^! y5 P+ HRange Commanders Council (RCC).

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UE Unit Equipment. UEME Unified Electro-Magnetic Effects. UEWR Upgrade Early Warning Radar. UF4 Uranium tetra fluoride. UF6 Uranium hexafluoride. MDA GLOSSARY, VER. 4.0 U 310 & k6 I0 R1 `8 eUFG User Focus Group. & f/ S4 h G+ J. t7 O( ^UFO UHF Follow-On [Satellite Communications System]. UFP Unit Flyaway Price. UGF Underground Facility. UGS Unattended Ground Sensors. + q- Q1 n. q4 h( R+ C* }' \UGT Under Ground Test. UHF Ultra High Frequency. 9 P; d/ r- i/ t7 B2 tUIC Unit Identification Code. : A0 t; c J1 B8 D! mUIN User Interaction Node. UKAS (1) UK Architecture Study (2) UK Associate Studies. . F8 Q$ E8 Y- e! XUKEADTB UK Extended Air Defense Test Bed. UKTB United Kingdom Test Bed. - j9 _4 c. v- Y' s( y) Y1 A) jULCS Unit Level Circuit Switch (SINCGARS term). % J$ T/ T9 S8 [: Y8 {ULS Unit Level Switch. ULSA Ultra Low Sidebobe Antenna. + |/ A% r- O$ M3 d! ?% MULTDS Unit Level Tactical Data Switch (SINCGARS term). ' d( W, L4 F t, \$ |Ultraviolet (UV) Electromagnetic radiation of wavelength between the shortest visible violet (about 3,850 Angstroms) and soft x-rays (about 100 Angstroms). UMD Unit Manning Document. UMMIPS Uniform Material Movement and Issue Priority System (ILS term). UNAAF Unified Action Armed Forces. 2 q5 q. T& ~8 r2 f) w% gUNC United Nations Command. + f5 t" w8 d% l6 PUnconventional Warfare ' e6 O& A9 x4 T! C$ Q: R) xA broad spectrum of military and paramilitary operations conducted in enemyheld, enemy-controlled or politically sensitive territory. Unconventional warfare + e: `# G) s8 @$ ~1 W1 hincludes, but is not limited to, the interrelated fields of guerrilla warfare, evasion and escape, subversion, sabotage, and other operations of a low visibility, / ?0 D. j( |* r8 Ccovert, or clandestine nature. & Z# r( }# F: C+ l. n( K. \( k& tUnified Action ; E* H1 C# \; ^$ pArmed Forces A publication setting forth the principles, doctrines, and functions governing the 1 I- o5 i6 Y) f0 E; _. Qactivities and performance of the Armed Forces of the United States when two or " Q& }% C. D+ n. ^( b' M9 dmore Services or elements thereof are acting together. ; ?" E W0 d' f1 Z- [Unified Command A command with a broad continuing mission under a single commander and 4 l( B; }/ s y3 d2 K& M5 Z/ }composed of significant assigned components of two or more Services, and ( `/ g9 @5 p jwhich is established and so designated by the President, through the Secretary 4 {3 f0 \) y# F9 U& z& Zof Defense with the advice and assistance of the Joint Chiefs of Staff. MDA GLOSSARY, VER. 4.0 U 8 d8 C: e4 j* J5 y* D. g) a311 UNISYS UNISYS Corporation. 3 q- ~# l8 e8 F- A- wUnited States Army Space Command (USARSPACE) , b0 |3 v, ]7 E5 }: C- i6 wThe Army component command of USSPACECOM. Responsible for the Army - j( M a' [3 S& M4 celements of the SDS system. Located in Colorado Springs, CO. * N( c# [+ L, s1 g" FUnited States 6 v! A. O, S ], M/ I! K5 k sSpace Command (USSPACECOM) The unified command responsible for planning and conducting ballistic missile . O t% Q. ]. w# ddefense. Located in Colorado Springs, CO. 9 l* D2 k' E w4 T- [/ l5 RUnited States * Z% T8 V7 S) tStrategic Command (USSTRATCOM) 0 V, v: A3 w8 [" |8 B4 xThe DoD unified command responsible for carrying out directed nuclear and nonnuclear strategic air, intercontinental ballistic missile, and sea-launched ballistic 9 ]0 r4 v4 \" p2 o, Zmissile offensive combat strikes. Located at Offutt AFB, NE. # V# t6 G! K0 d' w) {( B nUnited States Transportation Command 8 Z! Z* k5 J) h+ x8 n- E! E4 l(USTRANSCOM) 3 O. i1 [' W/ f4 G- rThe DoD unified command responsible for providing air, land, and sea transportation for the Department of Defense, both in time of peace and time of war. It is also responsible for providing airlift, sealift, surface transport, and 8 r8 L( ]: G2 K, x+ V2 Rterminal services, and commercial air, land, and sea transportation, including as needed to support the deployment, employment, and sustainment of U.S. forces on a global basis, as directed by the Secretary of Defense. Located at Scott ( l. P2 p% F! X; ]! u4 MAFB, IL.

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Unk Unknown. Unresolved Objects 9 a! s8 a- ]6 P/ jObjects so closely spaced with respect to the sensor focal plane as to be ' E: k/ T3 }" L6 a* [) _1 \2 h: Xindistinguishable from a single object. UNSC United Nations Security Council. UnSecEnergy Under Secretary of Energy. UOC Usable on Code (ILS term). UOES See User Operational Evaluation System. UPD Unconventional Passive Discrimination. 2 o9 G( R) U jUPS Uninterruptible Power Source. UQT Unit Qualification Training (ILS term). URIP University Research Initiative Support Program. URL Uniform Resource Locator (internet protocol term). URT Upgraded RTD. * T4 H- J( R" A$ j4 Y# |; @US/UK United States/United Kingdom. USA (1) United States Army. (2) Under Secretary of the Army. USAADASCH U.S. Army Air Defense Artillery School. USAAE U.S. Army Acquisition Executive. , d% i2 O& M$ s+ X& zMDA GLOSSARY, VER. 4.0 U 7 X( U* p1 P- ~2 U5 x9 f312 # t* P) U7 m) \5 }3 t5 G4 `USACE United States Army Corps of Engineers. ( x% p0 ]9 Z9 {7 Q& lUSACOM United States Atlantic Command, Norfolk, VA. , q' s4 Y5 K4 Q0 U( |USAF United States Air Force. USAF/AFMC/ESC U.S. Air Force Materiel Command, Electronic Systems Center; ex-ESD. 5 ~; ~, d2 L5 o' p! vUSAF/AFMC/SMC U.S. Air Force Materiel Command, Space and Missile Systems Center; ex-USAF ; J: I% {0 d" M- L* `- ^: RSystems Command /SSD. 5 N! X! X G( k9 G \; D6 X- dUSAF/OTEC U.S. Air Force Operational Test and Evaluation Center. USAF/SMC U.S. Air Fore Space and Missile Systems Center, Los Angeles AFB, CA. USAF/SSD U.S. Air Force/Space Systems Division; See USAF/AFMC/SMC. USAFE U.S. Air Forces in Europe. USAFLANT U.S. Air Force, U.S. Atlantic Command. USAKA U.S. Army Kwajalein Atoll. USAMICOM U.S. Army Missile Command, Redstone Arsenal, AL. USAMSIC See MSIC. USAMSAA U.S. Army Materiel Systems Analysis Activity. USAOEC U.S. Army Operational Evaluation Command, Alexandria, VA. + Q3 z. U% b& ?: vUSAOTEC U.S. Army Operational Test and Evaluation Command. USARCENT U.S. Army Forces, U.S. Central Command. USAREUR U.S. Army Forces, U.S. European Command. USARLANT U.S. Army Forces, U.S. Atlantic Command. $ K" {, i7 w* TUSARPAC U.S. Army Forces, U.S. Pacific Command. USARSPACE See United States Army Space Command. USASDC U.S. Army Strategic Defense Command (<1Oct 92). USASSDC U.S. Army Space and Strategic Defense Command, Huntsville, AL USATECOM U.S. Army Test and Evaluation Command. USATRADOC U.S. Army Training and Doctrine Command. 3 \3 X8 g2 Z" Y, E r5 F8 QUSB Upgraded SBD. ! h D2 Z2 e( R* tUSC U.S. Code. 5 w- q8 S* q% P6 n1 @ [& J8 WUSCENTAF U.S. Central Command Air Forces. 9 S. ?' B% S+ T1 ZMDA GLOSSARY, VER. 4.0 U 313 + U2 t9 C/ f, f/ U" g$ O' VUSCENTCOM United States Central Command, MacDill AFB, FL. USCG United States Coast Guard. , T( j; o; p1 {1 d. JUSCINCCENT Commander in Chief, U.S. Central Command. USCINCEUR U.S. Commander in Chief, Europe. + R. I; @- Y B# W7 u& ]$ bUSCINCLANT Commander-in-Chief, U.S. Atlantic Command. % o( ^0 s7 X; s; r+ n9 x. c# k3 L9 ?USCINCPAC Commander-in-Chief, U.S. Pacific Command. + J) C- `' j j. v" V6 n: ~0 D/ @USCINCSPACE Commander-in-Chief, U.S. Space Command. USCINCTRANS Commander in Chief, U.S. Transportation Command. USCS U.S. Customs Services. USD Under Secretary of Defense. 4 n: c: n2 Y8 S0 Q8 UUSD(A&T) Undersecretary of Defense (Acquisition and Technology). USD(A) OBSOLETE. Under Secretary of Defense (Acquisition.). , @5 B7 B$ Z% I7 [0 Z0 k+ W' K9 ZUSD(A)/STNF Under Secretary of Defense, Acquisition, Strategic and Tactical Nuclear Forces. ) l, I9 J0 s! j E; c" qUSD(P) Under Secretary of Defense for Policy. ; l8 ~! T l& tUSDA United States Department of Agriculture. 4 B% z @( y) T+ P8 LUSDAO U.S. Defense Attaché Office. USDELMC U.S. Delegation to the NATO Military Committee. USDR&E Under Secretary of Defense for Research and Engineering. User Friendly Primarily a term used in automatic data processing (ADP); it connotes a machine % y& C6 `! T# k# j9 ~(hardware) or program (software) that is compatible with a person's ability to operate it successfully and easily. User Operational 7 p3 C" @5 y& zEvaluation 0 w' K1 o8 `0 p7 q; Q! H3 iSystem (UOES) Prototypical system developed and tested as part of the early phases of the development process. A UOES has two objectives: (1) testing, evaluation, and training for a system proceeding through the normal acquisition process; and (2) contingency defense capability should the need arise prior to completion of the 9 F' d+ n; R. m: q2 P# p9 t8 Fnormal acquisition cycle. : {. g0 s9 l$ zUSEUCOM United States European Command, Stuttgart-Vaihingen, Germany. + J3 q1 Z5 B d h' Z: J* CUSFJ U.S. Forces Japan. 4 Z* H/ C' L- l, e. QUSFK U.S. Forces Korea. 5 U; Q4 J# o j ^! ~: qUSFK/CFC CSFK Combined Forces Command. USG U.S. Government. , G. t( Z, R8 `" a. h7 v* V& fUSIA United States Information Agency.

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MDA GLOSSARY, VER. 4.0 U 314 USLANTCOM United States Atlantic Command (Now see USACOM). USLANTFLT U.S. Atlantic Fleet. USMAR- / V" a, k4 R. C: `1 }+ v) kFORCENT * x; o' O! k6 \. \U.S. Marine Component, U.S. Central Command. 6 C. j" f' }5 H* i5 p9 `: wUSMAR-FORLANT U.S. Marine Component, U.S. Atlantic Command. USMAR-FORPAC U.S. Marine Component, U.S. Pacific Command. USMC United States Marine Corps. USMCR United States Marine Corps Reserve. USMILREP U.S. Military Representative. USN United States Navy. 7 f. p+ x& R$ |9 M& m, ~( @4 \, CUSNAVCENT U.S. Naval Forces, U.S. Central Command. USNAVEUR U.S. Naval Forces, U.S. European Command. USNIP U.S. Naval Institute Proceedings. , |2 o/ L6 ]/ M5 h1 z' c$ sUSNO U.S. Naval Observatory. USNPGS U.S. Naval Post-Graduate School. USPACAF U.S. Air Forces, U.S. Pacific Command. USPACFLT US Pacific Fleet. ) K1 p7 i' \5 ?USPACOM United States Pacific Command, Pearl Harbor, HI. USREPMC U.S. Representative to the Military Committee (NATO). USSC United States Space Command. USSOCOM United States Special Operations Command, Tampa, FL. . F$ R& k( j' J( }/ {* ?USSOUTHCOM United States Southern Command, Panama Canal Zone, Panama. 8 p8 R0 V6 q, K$ D& k) _6 x6 }USSPACECOM See United States Space Command. & d, j5 ]& Q# U2 L+ j& lUSSS United States Secret Service. USSTRATCOM See United States Strategic Command. % F# c0 z+ o+ f' U) D, A2 oUSTA United States Telephone Association. & ^0 u* V" W7 R& A4 l3 nUSTRANSCOM See United States Transportation Command. UT Universal Time. UTC Unit Type Code. MDA GLOSSARY, VER. 4.0 U 315 UTM Universal Transverse Mercator. UTTMDS Upper Tier Theater Missile Defense System. See THAAD System. 5 ^, N% |1 g& [- m/ CUUT Unit Under Test (ILS term). UV Ultraviolet. UV Electro- . A2 a( M4 B2 \* wOptics ( {5 m) x8 ^' m7 | ~ NTechnologies/techniques employed by optical sensors in the wavelength 6 ~2 n1 `, y {( ?8 V6 t% Lspectrum shorter than visible (e.g., less than 4,000 A). . L; c' e) W4 ~6 [, dUVPI Ultraviolet Plume Instrument. UW Unconventional Warfare. . |/ x+ O% w X7 R! B. |2 cMDA GLOSSARY, VER. 4.0 V ) q0 }4 m) s( `- f316 + ]3 [) d% \0 o4 BV Volt. 0 \" O2 z4 K; x1 W( ?V&H Vulnerability and Hardening. 5 l$ d7 x/ ?1 ^7 V7 qV&V Verification and Validation. (See Verification, Validation, and IV&V.) V/STOL Vertical Short Takeoff and Landing [aircraft]. # g" Z# Z; c4 I0 lVAFB Vandenberg Air Force Base, CA. ! I# U& e# O* ?- _, JValidation Confirmation that the processes and outputs from a test resource parallel real world processes and are realistically sensitive to change in the environment, tactical situation, system design, tactics, and threat. VAMOSC Visibility and Management of O&S Costs. VAR Visitor Access Request. Variability The manner in which the probability of damage to a specific target decreases with the distance from ground zero; or, in damage assessment, a mathematical - X) h# A7 @1 Y7 y: _' S" W0 \9 }factor introduced to average the effects of orientation, minor shielding, and uncertainty of target response to the effects considered. VBO Vertical Burn-Out (velocity). VCC Voice Communications Circuit. VCRM Verification Cross Reference Matrix. VCS Voice Communications System. VDC Volts Direct Current. - J1 N6 a7 F; ^8 n; A9 Z: W. zVDD Version Description Document. VDU Visual Display Unit. VE Value Engineering. / Y6 s9 Q! x6 f8 ]! [% @VECP Value Engineering Change Proposal. Verification (1) Confirmation that all data inputs, logic, calculations and engineering representations of a T&E resource accurately portray the characteristics, 5 R. b% V! m+ E0 E7 I, acalculations, logic, and interactions of the system under evaluation. 6 i2 Q! W/ w. ]* C(2) The process of evaluating a system or component during or at the end of the development process to determine whether it satisfies specified requirements. VESA Video Electronics Standards Association. 2 `+ ?, g- ~6 J0 ?1 \8 b8 J. k* LVFR Visual Flight Rules. 0 x' S! U' L3 ^" tVGA Video Graphics Array (Telecomm/Computer term). VHF Very High Frequency. VHSIC Very High Speed Integrated Circuit. MDA GLOSSARY, VER. 4.0 V 317 % p" y$ ?. p- L8 AVIDS Vehicle Integrated Defense Software (USA term). / _- @8 y C @" y1 E. G$ QVIGILANTE Viewing Image/Gimbaled Instrumentation Lab-Analog Neural Three-D Experiment. VIGILANTE involves building a small computer (ANTE) offering 1/12 4 T- b4 d e, G- e( @Operation Per Second (OPS), using a mixture of experimental three-dimensional circuitry and commercial components. Project also demonstrates VIRGIL, a 4 p8 ]$ K n: a) p( Jgimbaled airborne sensor with visible, experimental UV and quantum-well IR cameras capable of tracking targets that can be detected, identified, and , I( d! @" {/ x$ X$ j1 mprecision-tracked with the ANTE processor. VIM Vibration Isolation Module. , W$ I. X1 k3 d* ]# t9 E0 DVINSON Encrypted Ultra High Frequency Communications System. VIS Visible. VIS/UV Visible/Ultraviolet. Visibility Range 5 c$ Y4 B8 [" ]. Y$ ~8 l(or Visibility) The horizontal distance (in kilometers or miles) at which a large dark object can 1 J$ c/ N5 g6 H, [1 E7 Hjust be seen against the horizon’s sky in daylight. The visibility is related to the clarity of the atmosphere ranging from 170 miles (280 kilometers) for an 6 u2 g9 x' c- v( e' |6 }exceptionally clear atmosphere to 0.6 mile (1.0 kilometer) or less for dense haze or fog. The visibility on an average clear day is taken to be 12 miles (19 kilometers). Visible Electro- 1 S# P: ^# @/ D9 _% [5 o0 z5 {Optics Technologies/techniques employed by optical sensors in the visible portion of ( ~3 e2 P- A5 G4 S- b9 p& G" Jthe wavelength spectrum. VLAR Vertical Launch and Recovery (UAV JPO term). * Q9 F6 H; e6 I0 K0 f* V5 y& iVLF Very Low Frequency. VLOS Vertical Line of Sight.

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VLS Vertical Launch System. / r W! d+ ^" x& YVLSI Very Large Scale Integration. $ I. f6 _& E, s0 D2 { FVLSIC VLSI Circuits. VLWIR Very Long Wavelength Infrared. 4 w0 x( C! H m/ H0 qVME Versa Modular European [standards]. VMF Variable Message Format (Telecomm term). ! u. v/ i+ v3 m6 M- Q1 n- YVOX Voice Actuation. / v- x* e8 Y- L8 e; f* VVRI Vanguard Research, Inc., Fairfax, VA. * H7 R% z( V0 w) R. e1 k% \VTC Video Teleconference. VTOL Vertical Takeoff and Landing [aircraft]. VTOL-UAV Vertical Takeoff and Landing Unmanned Aerial Vehicle. VUE Visible Light/Ultraviolet Experiment. MDA GLOSSARY, VER. 4.0 V 318 8 w" q( m t2 g# vVulcan UK bomber. VV&A Verification, Validation, and Accreditation. VVER Pressurized water type nuclear power reactor. 1 _. n5 k6 o* M) L* Z# n1 LVVIRF Verification and Validation Information Request Form. MDA GLOSSARY, VER. 4.0 W 319 W/ With. , Q: C6 c W. `( V( Jw/o Without. 8 L% V1 a& n* X4 j+ W( tW/TD Warning/Threat Detection. WAA Wide Aperture Array. + U a3 B: V# p; E: y' ]WALEX Warfare Analysis Laboratory Exercise. WAM (1) Worldwide Military Command and Control System (WWMCCS). (2) Wide Area , F' X' M2 b, ]. O G/ OMunition. (3) Wide Area Mine. (4) Wide Area Missile. ; `& r2 p5 {% J6 E) ~3 ]WAN Wide Area Network (Telecomm/Computer term). 2 Z1 F$ Z7 j/ B" TWAP Wide Azimuth Probe. ; b4 r* m1 Z/ @+ L; g# p0 WWar Game A simulation, by whatever means, of a military operation involving two or more opposing forces, using rules, data, and procedures designed to depict an actual 8 y' ?1 b$ h$ R& Mor assumed real life situation. Wargame 2000 Title of MDA program for development of a state-of-the-art simulation tool at the - D2 K! a. f1 W' O1 c5 uJNTF for use in CONOPS validation, missile defense program design verification, validation and accreditation, and support CinC/Allied wargames and 0 [) T' e$ B; y( E5 z" a/ ]5 _, F; Zassessments. % Z5 x9 V& e+ EWarhead A weapon, usually thermonuclear, contained as the payload of a missile. : B! R+ P2 E) K& H$ _9 |Warhead Mating The act of attaching a warhead section to a rocket or missile body, torpedo, 9 @( j) R9 E# p9 lairframe, motor, or guidance section. * q q' D+ B! Y1 {Warhead Section A completely assembled warhead including appropriate skin sections and related 1 L. p8 \2 |9 Z# S3 fcomponents. ! ? \- K% `0 \* Q) KWARM Wartime Reserve Modes. / @# @; a8 s. b; vWarning of Attack A warning to national policymakers that an adversary is not only preparing its * l4 e( C: M% \- X( zarmed forces for war, but intends to launch an attack in the near future. / l, t( H' Y4 s& x$ p; oWarning Order A preliminary notice of an order or action that is to follow. WARSIM Warfighter Simulation (US Army term). WARSIM 2000 Warfighter Simulation 2000 (US Army term). ) b9 u5 I9 Q2 @Wartime Reserve Modes (WARM) Characteristics and operating procedures of sensor, communications, navigation aids, threat recognition, weapons, and countermeasures systems that (1) will # P- ~ E8 X2 m( [7 ]contribute to military effectiveness if unknown to or misunderstood by opposing : t0 A- F; _8 Q" {! o8 `commanders before they are used, but (2) could be exploited or neutralized if known in advance. Wartime reserve modes are deliberately held in reserve for ! w5 A( E8 R* D2 e3 q' ]9 F+ b5 jwartime or emergency use and seldom, if ever, applied or intercepted prior to [, Q5 O' W! Y/ ^+ t' nsuch use. 4 y7 w5 r& e4 ]# SWAS Wide Area Sensor. 3 Z. Z% F) |& N' I( g- pWASP Wide-body Airborne Surveillance Platform. A modified DC-10. 8 n% i7 K- H' Z5 ~ KMDA GLOSSARY, VER. 4.0 W 320 ; ^3 X" a3 y5 q, b# ~5 wWASHDC Washington, District of Columbia. , [4 [% T* Y! Z" y3 u3 n! {Wastage (Max) The maximum number of defense weapons which, when used, will be ineffective in contributing to the defeat of the offense. Watch Condition + d: q' f3 T+ s9 }: l' a* n(WATCHCON) Series of readiness conditions used by the intelligence community to alert staffs ( j4 F4 K1 s1 H0 Xto watchfulness without raising DEFCON. WATS Wide Area Telephone System. WAVE Wideband Angular Vibration Experiment. Wavelength The distance between two points having the same phase in two consecutive cycles of a periodic wave, along a line in the direction of propagation. WB Wideband. % ]7 j# s( e1 q' A% sWBM Weapons Battle Manager(s). WBS See Work Breakdown Structure. WCC (1) See Wing Control Center. (2) Weapons Control Computer. WCG Workstation Computer Graphics (Computer term). ) H1 U# @0 G- q' f' _7 u4 TWCP (1) Weapon Control Processor. (2) Weapon Control Platform. ) {$ A" i) M3 B& MWCS Weapons Control System. WDM Wavelength Division Multiplexon. / q t' a+ ?( Z0 qWeapon Enabling The set of control functions without which defense weapons cannot be launched.