Which statement about weather radar tilt and gain is most accurate?

Which statement about weather radar tilt and gain is most accurate?

• A. Tilt changes the vertical slice; Gain changes the sensitivity; missettings distort depiction.
• B. Tilt changes the vertical extent of radar coverage; Gain controls sensitivity to weak returns; missetting either can distort storm depiction.
• C. Tilt changes the azimuth field; Gain changes the range resolution.
• D. Tilt and gain have no effect on interpretation.

Answer: (B)

Tilt sets where the radar beam points in the vertical dimension, so it changes the vertical extent of the area the radar covers at a given distance. When you tilt higher, the beam samples higher altitudes; tilt lower brings in more near-surface echoes. This directly shapes how tall the storm appears and what parts of it you can observe. Gain determines how strongly echoes are amplified. It controls sensitivity to weak returns: cranking it up makes faint precipitation and distant echoes more visible but also amplifies noise, potentially adding false or exaggerated features; lowering it can hide light rain or subtle storm structures. Because both settings influence how a storm’s vertical structure and intensity are represented on the display, missetting either can distort the depiction. The other ideas—such as tilt affecting the azimuth field, or gain changing range resolution—don’t reflect how these controls actually operate, and thus are not as accurate.

Tilt sets where the radar beam points in the vertical dimension, so it changes the vertical extent of the area the radar covers at a given distance. When you tilt higher, the beam samples higher altitudes; tilt lower brings in more near-surface echoes. This directly shapes how tall the storm appears and what parts of it you can observe.

Gain determines how strongly echoes are amplified. It controls sensitivity to weak returns: cranking it up makes faint precipitation and distant echoes more visible but also amplifies noise, potentially adding false or exaggerated features; lowering it can hide light rain or subtle storm structures.

Because both settings influence how a storm’s vertical structure and intensity are represented on the display, missetting either can distort the depiction. The other ideas—such as tilt affecting the azimuth field, or gain changing range resolution—don’t reflect how these controls actually operate, and thus are not as accurate.