For a range of 100 nautical miles, the RADAR pulse repetition frequency should be?

In radar systems, the pulse repetition frequency (PRF) is a crucial parameter that affects the radar's ability to detect and track objects at various ranges. For a radar operating at a range of 100 nautical miles, the PRF must be set to a value that allows for the effective detection of targets while managing the radar's operational characteristics.

Choosing a PRF of 810 Hz or less is appropriate for this range because it ensures that the radar system can adequately handle the maximum range without generating range ambiguities. At this frequency, the radar can send out pulses and receive the echoes from targets within the specified distance, allowing for accurate distance measurement.

If the PRF were set too high, it could lead to issues such as range ambiguity, where the radar could confuse echoes from targets at different ranges, primarily when the target is at the furthest limits of detection. The choice of 810 Hz or less establishes a safe threshold for maintaining clarity and accuracy in the radar's performance over the specified 100 nautical mile range.