Which technique specifically mitigates rain clutter on a marine radar?

Which technique specifically mitigates rain clutter on a marine radar?

• A. Increase the gain to amplify rain echoes
• B. Apply sea clutter suppression
• C. Use filtering and wind shift
• D. Apply rain clutter suppression and filtering

Answer: (D)

Rain clutter is best handled by separating weather echoes from actual targets using Doppler processing and then cleaning up what remains with filtering. Doppler rain clutter suppression uses velocity information to distinguish rain from ships and other targets, removing those rain echoes while leaving legitimate targets intact. Adding filtering further reduces residual noise and speckle, giving a clearer radar picture. Increasing gain would amplify rain, not reduce it, and sea clutter suppression tackles sea reflections rather than rain; wind shift isn’t a standard rain mitigation method. So the combination of rain clutter suppression with filtering specifically addresses rain clutter and yields the best results.

Rain clutter is best handled by separating weather echoes from actual targets using Doppler processing and then cleaning up what remains with filtering. Doppler rain clutter suppression uses velocity information to distinguish rain from ships and other targets, removing those rain echoes while leaving legitimate targets intact. Adding filtering further reduces residual noise and speckle, giving a clearer radar picture. Increasing gain would amplify rain, not reduce it, and sea clutter suppression tackles sea reflections rather than rain; wind shift isn’t a standard rain mitigation method. So the combination of rain clutter suppression with filtering specifically addresses rain clutter and yields the best results.