What effect does high terrain have on radar surveillance?

What effect does high terrain have on radar surveillance?

• A. Radar shadowing
• B. Radar cluttering
• C. Radar amplification
• D. Radar interference

Answer: (A)

High terrain between the radar and the area being watched blocks the radio waves, creating radar shadowing. Radar relies on line-of-sight propagation, so mountains and ridges can obstruct the beam; objects behind these elevated features fall into a shadow zone where the radar cannot illuminate or detect them. This leads to blind spots in surveillance. Other phenomena described by the other options—clutter from ground or weather returns, amplification as a terrain effect, or interference from other signals—do not specifically arise from blocking the beam by terrain in the same way.

High terrain between the radar and the area being watched blocks the radio waves, creating radar shadowing. Radar relies on line-of-sight propagation, so mountains and ridges can obstruct the beam; objects behind these elevated features fall into a shadow zone where the radar cannot illuminate or detect them. This leads to blind spots in surveillance. Other phenomena described by the other options—clutter from ground or weather returns, amplification as a terrain effect, or interference from other signals—do not specifically arise from blocking the beam by terrain in the same way.