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Sopemea
Sopemea Société pour le Perfectionnement des
Matériels et Equipements Aérospatiaux (F).
SOPGM Stand-off precision-guided munition.
SOPS Special-Operations parachute system.
SOR 1 Struck off records.
2 Specific, or statement of, operational requirement.
3 State of readiness.
4 Specific Operational Requirement (USAF).
5 Station Operations Room (RAF).
6 Strategic offensive reductions.
sorb To acquire gas by sorption; hence sorbent material.
Soreas Syndicat des Fabricants d’Organes et d’Equipements
Aéronautiques et Spatiaux (F).
SORM Second-order reliability method.
SORO Scan on, receive only.
sorption Taking up of gas by absorption, adsorption,
chemisorption or any combination of these.
SORR Stage Operations Readiness Review (NASA).
SORT 1 Structures for orbiting radio telescopes.
2 Simulated optical range tester.
3 Strategic offensive reductions treaty [24 May 2002]
(Int.).
sortation Process of reading airline baggage bar code
and online * messages and directing item accordingly;
must handle airline’s own code, IATA 10-digit, Code 39
[old USPS] and Code 93 [new USPS].
sortie An operational flight by one aircraft. It is generated
when the aircraft takes off. Some authorities insist
mission must be offensive against surface target. Thus an
effective * crosses enemy frontier or front line, an
accredited * places bomb[s] on target.
sortie capacity Maximum number of sorties mounted by
unit or other airpower source (eg one airfield) in stated
period, usually 24 h.
sortie generation Ability of combat unit to put its
aircraft in air, especially around clock.
sortie number Reference identifying all images secured
by all sensors on one air reconnaissance sortie.
sortie plot Map overlay representing area(s) covered by
imagery during one sortie.
sortie rate Number of combat missions actually
performed by unit (eg squadron or polk) in 24 h period.
sortie reference See sortie number.
SOS 1 International distress signal.
2 Silicon on sapphire.
3 Special, or Space, Operations Squadron (USAF).
4 Sidewall overhead stowage in passenger airliner.
5 Stabilized optical sight.
6 Squadron Officer School (AU).
7 Systems of systems [A adds analysis] (SJFHQ).
Soscoe, SOSCOE System of systems common operating
environment (NATO).
Sostar Stand-off surveillance and target acquisition
radar (F, G, Spain, Netherlands).
Sosus Sound surveillance system.
SOT 1 Stator outlet temperature.
2 Small outline transistor.
3 Specific operational test.
4 Stand-off tactical [countermeasures evaluation
trainer].
5 Solar optical telescope.
6 Supply officer training; C adds course (RAF).
Sotas Stand-off target acquisition system.
SOTD Stabilized optical tracking device.
SOTI Sold outside, ticketed inside.
SOTO Sold outside, ticketed outside.
SoTT School of Technical Training.
SOTV Solar orbit transfer vehicle.
sound Longitudinal pressure waves transmitted through
elastic medium. In atmosphere velocity is a =
γ p
–– –– ρ
source
= c332.2 ms –1 at 0°C and 344 at room temperature;
in fresh water 1,410 ms –1 , in sea-water 1,540. Audible
to ear at frequencies c20 Hz to 20 kHz. See noise.
sound attenuation Reduction in sound intensity, esp.
through deliberate conversion to other energy forms, eg
heat, in absorbent or other layers of material.
sound barrier Conceptual barrier to manned flight at
supersonic speed when this was extremely difficult, ie
before about 1952.
sound energy Measure of either total emitted energy (for
brief sound, eg explosion) or sustained rate of energy
transfer for prolonged sound, in latter case measured in
watts.
sounding 1 Any penetration of natural environment for
observation or measurement.
2 Complete set of measures taken in and of upper
atmosphere for met or other purpose. Hence * balloon,
unmanned free balloon carrying upper-atmosphere
instruments; * rocket, stabilized but usually unguided
rocket carrying upper-atmosphere instruments.
sound intensity Average sound power passing at given
point through unit area normal to propagation, expressed
either in W/cm 2 or as sound level.
sound level Ratio of sound power to a zero reference,
expressed in dB (see noise).
sound locator Device for concentrating incident noise
from aircraft, usually by one or more large exponential
horns rotated in azimuth and elevation until intensity is
maximum.
sound power Sound energy (rate for sustained sound) in
watts.
sound pressure Total instantaneous pressure at point at
given time minus static pressure; unit is N/m 2 .
sound pressure level 20 log SPL/reference pressure (see
noise).
sound probe Instrument responding to sound, eg sound
pressure, without significantly altering sound field.
sound ranging Determining location of sound source by
measuring times of arrival at different locations.
sound suppressor See suppressor.
sound wave Disturbance conveying sound in form of
longitudinal alternate compressions/rarefactions through
any medium. Frequency spread may be much greater than
human aural range, and extreme-energy case is blast
wave, which initially (like shockwave) travels faster than
sound.
souped up Tuned to generate maximum possible power
[engine of racing aircraft] (colloq.).
source 1 Contractor for entire article, eg aircraft or
missile (see second *). More recently, a * of small items or
material for restoration.
2 Origin of noise.
3 Origin of fluid in fluid flow, or of large uniform air
mass in atmosphere. The counterpart of a sink.
4 Solid-state electrode connection corresponding to
cathode.
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