VT-IV Navigation Familiarization Exam II Practice

A heavy thunderstorm can affect the radar picture. What is the likely effect?

It terminates transmission It has no effect It can affect the radar picture It improves signal

Correct Answer:

It can affect the radar picture

Explanation:

When radar beams pass through a heavy thunderstorm, the dense precipitation strongly reflects and also absorbs some of the energy. That means the storm often shows up as a very bright echo, but at the same time the wave is weakened as it travels through the storm. The result is a degraded and sometimes distorted radar picture: echoes behind the storm can be weakened or missing, and the storm’s outline can look smeared or exaggerated. So a heavy thunderstorm can affect what you see on the radar display. It doesn’t stop transmission or improve the signal, and there is a definite effect to the image.

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