Pulse DurationThe time over which a radar pulse lasts. The pulse duration can be multiplied by the speed of light to determine the pulse length or pulse width.
Pulse Repetition FrequencyIn radar, the number of pulses the occur each second. Not to be confused with transmission frequency which is determined by the rate at which cycles are…
Pulsed Power EMRRadiated fields that have very high instantaneous peak field strengths or power density but significantly lower average values.
Purchase Order (PO)A contractual procurement document used primarily to procure supplies and nonpersonal services when the aggregate amount involved in any one transaction…
pWPrecipitable Water - measure of the depth of liquid water at the surface that would result after precipitating all of the water vapor in a vertical column…
PyrotechnicA mixture of chemicals which, when ignited, is capable of reacting exothermically to produce light, heat, smoke, sound, or gas, and may be also used to…
QDenotes the longer of the two chromosome arms, e.g. human 10q is the long arm of human chromosome 10.
Qualification TestThis test simulates defined environmental conditions with a predetermined safety factor, the results indicating whether a given design can perform its…
QueryA request for identification of a set of assets, expressed in terms of a set of criteria, which the identified item must satisfy.
queueA system where if a realm is overloaded, subsequent players trying to log on will be queued up in a first come first serve basis and allowed to log on…
radarAcronym for RAdio Detection And Ranging; a radio device or system for locating an object by means of ultrahigh-frequency radio waves reflected from the…
Radar BeaconA receiver-transmitter combination which sends out a coded signal when triggered by the proper type of pulse, enabling determination of range and bearing…
RADHAZ(1) Electromagnetic Radiation Hazard. (2) Hazards form electromagnetic radiation.
Radiant ExposureThe total amount of thermal radiation energy received per unit area of exposed surface; it is usually expressed in calories per square centimeter. 242
Radiation(RAY-dee-AY-shun) Energy released in the form of particle or electromagnetic waves.
Radiation HardeningProtection of a particular system, subsystem, or component from functional damage due to the effects of nuclear (or other) radiation by shielding the…
RADIC SystemRapidly Deployable Integrated Command and Control System.
Radio Blackout (RBO)The complete disruption of radio (or radar) signal over large areas caused by the ionization accompanying a high altitude nuclear explosion, especially…
Radioactive (or Nuclear) CloudAn all-inclusive term for the volume of hot gases, smoke, dust, and other particulate matter from the nuclear weapon itself and from its environment, that…
RadioactivityThe spontaneous decay of disintegration of an unstable atomic nucleus accompanied by the emission of radiation.
Random DefenseEngagement of RVs uniformly without any reference to type or destination. This implies taking the best shot possible in terms of increasing probability to…
Range ResolutionThe ability of the radar to distinguish two targets along the same radial but at different ranges. it is approximately ½ the pulse length.