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Automatic switching of LOW PRF under near-ground and heavy main lobe clutter


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As an alternative PRF, low PRF is mainly used in A/G mode. But it can also be used in the case of heavy clutter (automatic). It is hoped that the radar can add LOW PRF in the case of near-ground and heavy main lobe clutter.

 

Low prf is selected when a target is screened by main lobe clutter (MLC) unless conditions exist as listed below:

a. AIM-7 missile illumination, PDI, is not required.

b. Target range is less than MLC range.

c. Good signal to noise ratio exists.

 

LPRF provides long radar receiver-exciter (R/E) listening time. Range measurements are made by measuring the time between pulse transmission and target return.Velocity is determined by measuring the rate of position change between target returns. LPRF cannot be manually selected.

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