# pulse repetition frequency

pulse repetition frequency
In radar, the number of pulses that occur each second. Also called the pulse recurrence rate, or PRR. It should not be confused with the transmission frequency, which is determined by the rate at which cycles are repeated within the transmitted pulse. The distance between two pulses in time is called the pulse recurrence period (PRP), and its relationship with PRF can be described as PRP ° 1/PRF second. The illustration shows returns from two targets, one closer than the other. The return from the distant target is smaller than that of the closer target because of the spreading out of radar energy as it propagates and the wave attenuation in the atmosphere. If the next pulse were sent before the distant target arrived, the timing circuit would be confused and an ambiguous measurement might take place. Thus, the time between successive pulses is arranged to correspond to the outward and return time for the targets at the maximum possible range of detection. Returns from targets beyond this range will be so small that they usually will not be detected.

Aviation dictionary. 2014.

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• Pulse repetition frequency — (PRF) is the number of pulses transmitted per second by a radar. The reciprocal of this is called the Pulse Repetition Time (PRT), Pulse Repetition Interval (PRI), or Inter Pulse Period (IPP), which is the elapsed time from the beginning of one… …   Wikipedia

• pulse repetition frequency — impulsų dažnis statusas T sritis automatika atitikmenys: angl. pulse frequency; pulse rate; pulse repetition frequency vok. Impulsfolgefrequenz, f; Impulsfrequenz, f; Pulsfrequenz, f rus. частота импульсов, f; частота повторения импульсов, f;… …   Automatikos terminų žodynas

• pulse repetition frequency — impulsų dažnis statusas T sritis Standartizacija ir metrologija apibrėžtis Tam tikro pavidalo impulsų kartojimosi dažnis. atitikmenys: angl. pulse frequency; pulse rate; pulse repetition frequency vok. Impulsfolgefrequenz, f; Impulsfrequenz, f;… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

• pulse repetition frequency — impulsų dažnis statusas T sritis fizika atitikmenys: angl. pulse frequency; pulse rate; pulse repetition frequency vok. Impulsfolgefrequenz, f; Impulsfrequenz, f; Pulsfolgefrequenz, f rus. частота импульсов, f; частота повторения импульсов, f;… …   Fizikos terminų žodynas

• pulse repetition frequency — 1. In lasers, the number of pulses that occur each second. 2. In radar, the number of pulses that occur each second. Pulse repetition frequency should not be confused with transmission frequency, which is determined by the rate at which cycles… …   Military dictionary

• pulse repetition frequency — Telecommunications. the number of pulses per second in a system of pulse transmission. Also, pulse repetition frequency. Abbr.: PRF. * * * …   Universalium

• pulse repetition frequency — Telecommunications. the number of pulses per second in a system of pulse transmission. Also, pulse repetition frequency. Abbr.: PRF …   Useful english dictionary

• Pulse-Doppler radar — Pulse Doppler is a radar system capable of not only detecting target location (bearing, range, and altitude), but also measuring its radial velocity (range rate). It uses the Doppler effect to determine the relative velocity of objects; pulses of …   Wikipedia

• pulse frequency — impulsų dažnis statusas T sritis automatika atitikmenys: angl. pulse frequency; pulse rate; pulse repetition frequency vok. Impulsfolgefrequenz, f; Impulsfrequenz, f; Pulsfrequenz, f rus. частота импульсов, f; частота повторения импульсов, f;… …   Automatikos terminų žodynas

• pulse frequency — impulsų dažnis statusas T sritis Standartizacija ir metrologija apibrėžtis Tam tikro pavidalo impulsų kartojimosi dažnis. atitikmenys: angl. pulse frequency; pulse rate; pulse repetition frequency vok. Impulsfolgefrequenz, f; Impulsfrequenz, f;… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

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