Which weather phenomena most degrade radar performance and why?

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Multiple Choice

Which weather phenomena most degrade radar performance and why?

Weather directly affects radar by changing how energy travels and what echoes look like. The most impactful factor is heavy precipitation combined with rough sea states because they create a lot of clutter and absorb or scatter the radar pulses. Large or dense rain drops attenuate the radar energy, reducing the strength of true echoes and, at higher frequencies, can even limit the usable range. Rough seas produce strong surface clutter—the water and spray reflect a lot of energy back to the radar—which can mask objects and resemble targets near the surface, making it hard to distinguish real targets from the background. Clear skies don’t degrade radar; mild wind isn’t as influential as heavy rainfall; and while temperature can affect propagation through refractive effects, it’s not the dominant degradation mechanism described here.

Weather directly affects radar by changing how energy travels and what echoes look like. The most impactful factor is heavy precipitation combined with rough sea states because they create a lot of clutter and absorb or scatter the radar pulses. Large or dense rain drops attenuate the radar energy, reducing the strength of true echoes and, at higher frequencies, can even limit the usable range. Rough seas produce strong surface clutter—the water and spray reflect a lot of energy back to the radar—which can mask objects and resemble targets near the surface, making it hard to distinguish real targets from the background.

Clear skies don’t degrade radar; mild wind isn’t as influential as heavy rainfall; and while temperature can affect propagation through refractive effects, it’s not the dominant degradation mechanism described here.

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