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Departments - The command and control systems of the headquarters of the
service component commands - The command and control support systems of
DoD agencies. The system furnishes a multi-path channel of secure
communications to transmit information from primary sources to those who must
make decisions (including the President) and to transmit their decisions (in the
form of military orders) to subordinates.
WP (Former) Warsaw Pact Countries.
WPAFB Wright-Patterson AFB, Dayton OH.
WPC Warsaw Pact Countries.
WPD Work Package Directive.
WPN Weapon Procurement Navy.
WR Western Range.
WR/VAFB Western Range/Vandenburg Air Force Base.
WRA See Weapons Release Authority.
WRM War Reserve Materiel.
WRSK War Reserve Spares Kit.
WRTTM Warhead Replacement Tactical Telemetry Module (USAF term).
WS Warning System.
WSE Weapon Support Equipment.
WSEM Weapons System Evaluation Program.
WSESRB Weapons System Explosive Safety Review Board.
WSI Wafer-Scale Integration.
WSM Waterspace Management (USN term).
WSMC Western Space and Missile Center, Vandenberg AFB, CA.
WSMR (1) White Sands Missile Range, NM (2) Western Space and Missile Range.
WTA Weapon Target Assignment.
WTO Warsaw Treaty Organization.
WTP Weapon Test Plan.
WTR Western Test Range.
MDA GLOSSARY, VER. 4.0 W
324
WUC Work Unit Code (ILS term).
WWABNCP Worldwide Airborne Command Post.
WWG Wideband Waveform Generator.
WWIMS See Worldwide Indications Monitoring System.
WWMCCS See World-Wide Military Command and Control System.
WWW World Wide Web.
WX Weather.
MDA GLOSSARY, VER. 4.0 X,Y,Z
325
X-ON/X-OFF Transmitter On/Transmitter Off (Telecomm/Computer term).
X-Ray Laser
(XRL)
A laser that generates a beam or beams of x-rays. Also called an "X-raser."
X-Rays Electromagnetic radiation of high energy, which results from either the release of
energy from electrons changing orbits about the nucleus (discrete) or the inelastic
collision of charged particles with the electromagnetic field of the nucleus.
X-rays have wavelengths shorter than those in the ultraviolet region, e.g., less
than 10E-6 cm or 100 Angstroms. Materials at very high temperatures (millions
of degrees) emit such radiations; they are then called thermal x-rays. As
generally produced by x-ray machines, they are "bremsstrahlung" resulting from
the interaction of electron of 1 kilo electron-volt or more energy with a metallic
target. (See Electromagnetic Radiation and Thermal X-Rays.)
XBR X-Band Radar.
XCVR Transceiver.
XDS Exoatmospheric Defense System.
XGA Extended Graphics Array.
XIWT Cross Industry Working Team.
XMTR/CVR Transmitter/Receiver.
XO Executive Officer.
XoDis Exoatmospheric Discrimination.
XOX Assistant Deputy Chief of Staff for Operations (Office Code).
XRL See X-Ray Laser.
XRS USAF/ESC Staff Symbol.
XTB Exoatmospheric Test Bed.
XTV Experimental Test Vehicle.
Xwindows Unix graphics interface.
Yield (or Energy
Yield)
The total effective energy released in a nuclear (or atomic) explosion. It is
usually expressed in terms of the equivalent tonnage of TNT required to produce
the same energy release in an explosion. The total energy yield is manifested
as nuclear radiation, thermal radiation, and shock (and blast) energy, the actual
distribution being primarily dependent upon the medium in which the explosion
occurs, as well as the type of weapon and the time after detonation.
Zero Point The location of the center of a burst of a nuclear weapon at the instant of
detonation. The zero point may be in the air or on or beneath the surface of
land or water, dependent upon the type of burst; it is thus to be distinguished
from ground zero.
ZIF Zero Insertion Force.
ZULU Time Zone Indicator for Universal Time.
MDA GLOSSARY, VER. 4.0
326
Units of Measurement
Keyword/Symbol Unit Name Aspect Measured
[ a ] ampere electric current
[ angstrom ] angstrom length
[ b ] bit binary digit 0 or 1
[ bps ] bit per second bit transfer rate
[ C ] coulomb electric charge
[ c; Ci ] curie radioactivity
[ cal ] calorie energy
[ cal/sq cm ] calorie per square energy per area
centimeter
[ chan ] channel frequency path
[ cm ] centimeter length
[ cu cm ] cubic centimeter volume
[ dB] decibel signal strength
[ deg ] degree plane angle
[ deg K ] degree, Kelvin temperature
[ deg/s ] degree per second plane angle change rate
[ deg/s/s ] degree per second slew acceleration
per second
[ diam ] diameter length
[ dyn ] dyne force
　
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