What is typically used to measure the duration of emitted radar pulses?

The duration of emitted radar pulses is most accurately measured using pulse width (PW). Pulse width refers to the time interval during which a radar signal is transmitted. It is a critical parameter in radar systems because it affects the radar's resolution and echo intensity. A shorter pulse width allows for better range resolution, enabling the radar to distinguish between closely spaced objects.

The other options, while relevant to radar operations, do not specifically measure the duration of the radar pulses. The duty cycle relates to the ratio of the time the radar transmitter is on to the time it is off within a given time period, which does involve pulse width but is a different concept, focusing on the power efficiency of the system. Pulse repetition frequency (PRF) indicates how often radar pulses are emitted in a given time frame and does not provide information about the duration of individual pulses. Transit time typically pertains to the time it takes for a radar pulse to travel to a target and back again, which is related to range measurements rather than pulse duration itself.