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polar orbit
polar orbit Orbit passing over, or close to, poles of
primary body.
polar Pacific Air mass originating over N Pacific or N
America, seasonal characteristics; abb. P P .
polar plot Locating a point, eg target, by polar coordinates.
Polar stereographic Map projection, that of high-latitude
region projected on flat sheet touching Earth at Pole
by light source at opposite pole. Parallels expand at sec 2
co-lat/2.
polar triangle One formed by three intersecting great
circles.
pole 1 Origin of polar co-ordinate system.
2 Point of concentration of magnetic charge (magnetic
*).
3 Point of concentration of electric charge (dipole and
sought-after monopole).
4 Intersection of Earth’s surface and axis of rotation
(geographic *).
5 For any circle on spherical surface, intersection of
surface and normal line through centre of circle.
6 Parts of surface of magnet through which magnetic
flux emanates or enters (theoretical but necessary
concept).
7 Terminal of battery.
pole model Miniature or full-scale model, eg complete
aircraft, mounted on tall pole to measure RCS (2) from all
aspects.
pole piece That part of core of electromagnet which
terminates at air gap.
poll 1 To ask specific questions of number of sensors;
questions are normally asked sequentially, and answers
constitute an update of information in system.
2 Technique used in data transmission whereby several
terminals share communication channels, particular
channel chosen for given terminal being determined by
testing each to find one free, or to locate channel on which
incoming data are present. Also used to call for transmissions
from remote terminals by signal from central
terminal; method used for avoiding contention.
polled ACARS mode in which airborne system transmits
only in response to received uplink message.
poll the room To obtain consensus in solving problem in
manned space mission.
polonium Po, grey semi-metal, energy source for spacecraft,
density 9.3, MPt 254°C.
polyanilines Range of electrically conducting plastics
made by oxidising aniline and then polymerizing with
various acids; basis of smart skins.
polybutadiene acrylic acid, PBAA Important solid
rocket propellant and monofuel.
polybutadiene acrylonitrile, PBAN Important solid
rocket propellant and monofuel.
polyconic Mapmaking by projecting latitude bands on
the succession of cones, each centred on Earth’s axis and
each touching surface along parallel passing through
centre of map, subsequent strips on single-curvature
conical surface being unrolled.
Polydol Alcohol-resistant foam liquid for firefighting
made from protein hydrolysate and an organometallic
complex; mixes with fresh or sea-water.
polygon warhead One having several (typically 8–16)
radial faces from which are projected tailored fragments,
steels balls, shaped-charge jets or other damage mech-
pop-up
anisms. Common type of warhead for SAMs and AAMs,
radial blasts being so timed that their plane passes
through target.
polymerization Basic processes for making large (highpolymer)
molecules from small ones, normally without
chemical change; can be by addition, condensation,
rearrangement or other methods.
polymer optical backplane Airframe structure on which
are printed fibre-optic conductors.
polymorph Aircraft capable of gross change of shape.
polyphase coding Pulse-compression technique for
radar, esp. for fighters, in which successive phases are
rotated by fixed angles such as 90°.
polyvalence, polyvalent Multirole (F).
POM 1 Printer output microfilm.
2 Program objective(s) memorandum, or memoranda
(DoD).
Pomcus Prepositioned overseas materiel configured in
unit sets (ie, grouped by user units).
POMO, Pomo Production oriented maintenance
organization (USAF).
Pomros Power-off minimum rate of sink.
POMS Production-oriented maintenance system.
pond Reservoir for cooling water below testbed for large
rockets.
ponding Settlement of runway subsoil leading to formation
of standing-water pond in rain.
P1E Phase 1 enhancement.
pongo Member of friendly army (RAF colloq.).
PONO Project office nominated official.
pontoon 1 Inflatable buoyancy bag used as permanent
alighting gear for helicopter.
2 Rigid float, of circular or rectangular section, used on
early water-based aircraft.
POO 1 Payload of opportunity.
2 Pronounced poo, to clear manned-spacecraft
computer display prior to solving fresh problem, from
P-zero-zero (colloq.).
Pooley’s Flight guide to UK and Ireland, commercially
published annually.
pool fire Burning pool of fuel surrounding crashed
aircraft.
poopy suit Flight-crew overwater survival suit (colloq.).
POP 1 Probability of precipitation.
2 Product optimization programme.
3 Plug-in optronic payload.
4 Period of performance.
5 Point of presence.
pop Sudden rise by target, from ground cover or out of
clutter on radar.
Popeye Air-intercept code: “I am in cloud or reduced
visibility”.
popouts Fast-inflating buoyancy bags for flotation in
emergency.
poppet valve Common mushroom-type valve of piston
engine.
Pop rivet Pioneer form of tubular rivet closed by withdrawing
central mandrel which forms integral part of each
rivet and is gripped by jaws of tension tool.
POPS, Pops 1 Position and orientation propulsion
system.
2 Pyrotechnic optical-plume simulator.
pop-up Manoeuvre made by attack aircraft in transition
from lo penetration to altitude from which target can be
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