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PACAF [United States} Air Forces Pacific.
PACBAR Pacific [Radar] Barrier.
PACFLT Pacific Fleet (US).
Packaging,
Handling,
Storage, and
Transportation
(PHS&T)
The resources, processes, procedures, design considerations, and methods to
ensure that all system, equipment, and support items are preserved, packaged,
handled, and transported properly, including environmental considerations,
equipment preservation requirements for short- and long-term storage, and
transportability.
Packet Switching
(PSW)
A data transmission process, utilizing addressed packets, whereby a channel is
occupied only for the duration of transmission of the packet. In certain data
communication networks the data may be formatted into a packet or divided and
then formatted into a number of packets (either by the data terminal equipment
or by equipment within the network) for transmission and multiplexing purposes.
PACOM U.S. Pacific Command.
PACOSS Passive and Active Controls of Space Structures.
PADIL Patriot Data & Information Link.
MDA GLOSSARY, VER. 4.0 P
218
PAFB Patterson Air Force Base.
PAL Permissive Action Link.
PALS Protection Against Limited Strikes (SDIO term).
PAM Pulse Amplitude Modulation.
PAN Polyacrylonatrile [carbon fiber].
Pancake Altitude Altitude at which the trailing edge of a chaff puff/cloud effectively catches up to
the leading edge because of atmospheric slowdown.
PAP Predicted Aim Point.
PAR (1) Phased-Array Radar.
(2) Perimeter Acquisition Radar. (See Phased Array.)
(3) Preprocessing Analysis Report.
(4) Program Assessment Report.
(5) Pulse Acquisition Radar.
Parallel
Processing
In parallel processing multiple processors (CPUs) divide up a large task into
smaller ones and each CPU acts on the subdivided task simultaneously so that
much higher effective processing speeds can be attained.
Parametric Cost
Estimate
A cost estimating methodology using statistical relationships between historical
costs and other program variables such as system physical or performance
characteristics, contractor output measures, manpower loading, etc. Also
referred to as a top-down approach.
PARCS Perimeter Acquisition Radar and Attack Characterization System.
PARPRO Peacetime Application of Reconnaissance Programs.
Partial Mission
Capable
Material condition of an aircraft or training device indicating that it can perform at
least one, but not all, of its missions. Also called PMC. See also Full Mission
Capable.
Participating
Service
A military Service that supports the lead Service in the development of a joint
acquisition program by its contribution of personnel and/or funds.
Particle Beam
(PB)
High-energy beam made up of atomic/sub-atomic particles (electrons, protons, or
neutrons) accelerated to near the speed of light.
Particle Beam
Weapon (PBW)
A weapon that relies on the technology of particle accelerators (atom-smashers)
to emit beams of charged or neutral particles, which travel near the speed of
light. Such a beam could theoretically destroy a target by several means, e.g.,
electronics upset, electronics damage, softening/melting of materials, sensor
damage, and initiation of high explosives.
PASS POET Advanced Submunition Study.
Passive In surveillance, an adjective applied to actions or equipment, which emit no
energy capable of being detected.
MDA GLOSSARY, VER. 4.0 P
219
Passive Air
Defense
All measures, other than active air defense, taken to minimize the effectiveness
of hostile air action. These measures include deception, dispersion, and the use
of protective construction.
Passive
Communications
Security Threats
Threats to electronic systems posed by a capability to obtain intelligence through
intercepting and evaluating intentional and inadvertent electromagnetic
emanations from electronic components of the system; e.g. communications
interception and direction finding.
Passive Defense (1) Measures taken to reduce the probability of and to minimize the effects
of damage caused by hostile action without the intention of taking the
initiative.
(2) Passive defense minimizes the probability and effects of theater missile
attack by reducing an enemy’s ability to target friendly assets, reducing
the vulnerability of critical forces and infrastructure, and improving the
potential to survive and resume operations after an attack. Passive
measures might include counter-surveillance, deception, camouflage and
concealment, hardening, electronic warfare, mobility, dispersal, and
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