What term is used for the capability of a radar system to separate closely spaced targets?

The term that refers to the capability of a radar system to separate closely spaced targets is known as azimuth resolution. Azimuth resolution is a measure of how well a radar system can distinguish between two targets that are located at the same range but are spaced apart in the azimuth direction (which is typically the horizontal plane). It is critical for effectively identifying and tracking multiple targets that may be closely spaced in a particular direction.

This concept is essential in radar operation, as higher azimuth resolution allows for more precise target discrimination, thereby enhancing overall situational awareness and the effectiveness of the radar system in identifying and engaging multiple targets simultaneously. The accuracy of the measurements and the clarity of the radar image are highly dependent on azimuth resolution, making it a key performance parameter in radar design and operational effectiveness.