Which statement about radar resolution cell is true?

Which statement about radar resolution cell is true?

• A. It defines the minimum resolvable area of the radar's field of view
• B. It measures the radar's pulse repetition frequency
• C. It is used only in air traffic control systems
• D. It is unrelated to target separation

Answer: (A)

Radar resolution cell is the smallest piece of space that a radar can distinguish as a separate target. It sets the minimum area (or volume, when you include range) over which reflections are grouped as one return. In practice, the size of this cell is determined by how finely you can resolve in range (tied to pulse width) and in azimuth or cross-range (tied to antenna beamwidth). So the statement that it defines the minimum resolvable area of the radar’s field of view is the best choice because it captures the essence that two targets separated by less than this cell cannot be distinguished as separate returns. The other ideas don’t fit because the radar’s pulse repetition frequency is a timing parameter, not a measure of how finely the radar can resolve space; resolution applies to many radar applications, not just air traffic control; and the resolution cell is directly related to target separation—if two targets lie within the same cell, they will merge into a single return rather than appear as distinct targets.

Radar resolution cell is the smallest piece of space that a radar can distinguish as a separate target. It sets the minimum area (or volume, when you include range) over which reflections are grouped as one return. In practice, the size of this cell is determined by how finely you can resolve in range (tied to pulse width) and in azimuth or cross-range (tied to antenna beamwidth). So the statement that it defines the minimum resolvable area of the radar’s field of view is the best choice because it captures the essence that two targets separated by less than this cell cannot be distinguished as separate returns.

The other ideas don’t fit because the radar’s pulse repetition frequency is a timing parameter, not a measure of how finely the radar can resolve space; resolution applies to many radar applications, not just air traffic control; and the resolution cell is directly related to target separation—if two targets lie within the same cell, they will merge into a single return rather than appear as distinct targets.