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The pulse-repetition frequency (PRF) is the number of pulses of a repeating signal in a specific time unit. The term is used within a number of technical disciplines, notably radar . In radar, a radio signal of a particular carrier frequency is turned on and off; the term "frequency" refers to the carrier, while the PRF refers to the number of ...
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The amount of energy that is returned to the radar receiver is a function of the peak energy of the pulse, the pulse width, and the pulse repetition frequency. Increasing the pulse width increases the amount of energy reflected off the target and thereby increases the range at which an object can be detected. Radars measure range based on the ...
A pulse per second (PPS or 1PPS) is an electrical signal that has a width of less than one second and a sharply rising or abruptly falling edge that accurately repeats once per second. PPS signals are output by radio beacons, frequency standards , other types of precision oscillators and some GPS receivers.
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One of two pulsing impact sprinkler at The Crescent Grange in Broomfield, Colorado providing 5,000 square feet (460 m 2) of coverage of their permaculture garden. The sprinklers were run continuously, delivering 5-second pulses per minute for the first twelve days to germinate the seeds. Thereafter, it was gradually cut back to 8- to 10-hour ...
Jason Mendez/Getty; Noam Galai/Getty . Caitlin Clark at TIME dinner in New York City on Dec. 11, 2024; Megyn Kelly at SiriusXM Studios on May 20, 2024
The U.S. Environmental Protection Agency on Wednesday granted California its request to enforce vehicle emissions standards stricter than federal rules, including the state's ban on sales of new ...