Final answer:
The edge of scope separation for an aircraft less than 40 miles away from the antenna site is called Nearfield Radar Boundary. It refers to the region close to the radar antenna where the radar beam pattern is distorted due to the proximity of the aircraft.
Step-by-step explanation:
The edge of scope separation for an aircraft less than 40 miles away from the antenna site is called Nearfield Radar Boundary (C).
This term refers to the region close to the radar antenna where the radar beam pattern is distorted due to the proximity of the aircraft. It is within this boundary that the radar may encounter limitations in accurately detecting and tracking the aircraft.
For example, if an aircraft is within the nearfield radar boundary, the radar may not be able to accurately determine the distance, speed, or other characteristics of the aircraft. Therefore, it is important for radar operators to be aware of this boundary when analyzing radar data.