Which set of factors are listed as affecting radar performance?

Which set of factors are listed as affecting radar performance?

• A. Launch, Boost, Sustain
• B. Antenna Height, Target Altitude, Distance to higher Terrain
• C. Joint Air Request Net
• D. APPENDIX 10 to annex C of the OPORD

Answer: (B)

Radar performance hinges on geometry and how terrain shapes the path of the signal. Antenna height determines how far the radar can “see” over the Earth's surface; a higher antenna increases the line-of-sight horizon, reducing blind spots and extending detection range. Target altitude matters because a higher-elevated target can clear ground clutter and terrain masking more easily, changing the elevation angle at which returns are received and often improving detectability at a given range. Distance to higher terrain is crucial since mountains or tall features between the radar and the target can block, reflect, or shadow the radar energy, weakening or eliminating returns in those areas. The other options refer to things not related to radar detection physics, such as launch phases or unrelated nets/documents, so they don’t describe factors that affect radar performance.

Radar performance hinges on geometry and how terrain shapes the path of the signal. Antenna height determines how far the radar can “see” over the Earth's surface; a higher antenna increases the line-of-sight horizon, reducing blind spots and extending detection range. Target altitude matters because a higher-elevated target can clear ground clutter and terrain masking more easily, changing the elevation angle at which returns are received and often improving detectability at a given range. Distance to higher terrain is crucial since mountains or tall features between the radar and the target can block, reflect, or shadow the radar energy, weakening or eliminating returns in those areas.

The other options refer to things not related to radar detection physics, such as launch phases or unrelated nets/documents, so they don’t describe factors that affect radar performance.