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PATRIOT.
Theater Missile
(TM)
A 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.
Theater 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
Defense Ground-
Based Radar
(TMD-GBR)
A 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)
An 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
thermal energy received per unit area at a specified distance is generally
expressed in terms of calories per square centimeter.
Thermal Imagery Imagery produced by sensing and recording the thermal energy emitted or
reflected 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
Technologies/techniques associated with the control and management of
thermal energy, its generation, dissipation, and recovery.
Thermal
Radiation
Electromagnetic radiation emitted (in two pulses from a nuclear air burst) from the
fireball as a consequence of its very high temperature; it consists essentially of
ultraviolet, visible, and infrared radiations.
Thermal X-Rays The electromagnetic radiation, mainly in the soft (low energy) x-ray region,
emitted by the nuclear weapon residue by virtue of its extremely high
temperature; it also is referred to as the primary thermal radiation. It is the
absorption of this radiation by the ambient medium, accompanied by an increase
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
Thermosphere The atmospheric shell extending from the top of the mesosphere to outer space;
it 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
Characterization
An 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
trajectories to be represented by a single trajectory in battle management
computation.
Threat Scenario A hypothetical example of the employment of threat systems against ballistic
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
value (threshold) required to satisfy the mission need and a performance
objective.
Threshold
Defense
A defense strategy that concedes that the target can be destroyed at a price
that 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.
Thrusted
Replicas (TREPS)
Conical 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
phase.
TI (1) Technical Instruction. (2) Technology Insertion.
TIARA Tactical Intelligence and Related Activities.
TIBS (1) Theater Information Broadcast Service.
(2) Tactical Information Broadcast System.
(3) Theater Intelligence Broadcast System.
TIC (1) Thermionic Integrated Circuit. (2) Technical Information Center.
TIDP Technical Interface Design Plan.
TIE (1) Technology Integration Experiments. (2) Technical Independent Evaluation.
Tier An integrated set of SDS elements that address a particular phase of the threat
(e.g., boost phase).
Tiered Defenses The use of defensive systems at different phases of the missile trajectory.
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