There exist various factors over which surface clutter depends like the nature of the surface including dimension, roughness, grazing angle, etc.īasically, the clutter at the radar is considered to be the vector sum of various individual echoes from different objects in which some are stationary like building, tower, etc. But sometimes the moving objects on the ground leads to the generation of non-stationary echoes.Īlso, the clutter generated from the sea is non-stationary in nature due to the movement of waves in the sea. Generally, the echoes from the objects on the land are stationary. Surface clutters are the echoes generated from ground/land or sea. Let us proceed to understand how the clutters are basically classified. So, this implies that an environmental echo that is the desired signal in one case is simply, a clutter in another case. In a similar way, the objects in the ground could be the targets for ground-mapping radar system but will be the unwanted objects causing clutters for weather radars. But for the radar meteorologists, the storm clouds containing rain act as the target for determining the rainfall rate. Suppose a radar system wants to detect the presence of an aircraft, so for it, the storm clouds in the environment will act as undesired element in the detection of the target. It is to be noted here that the echoes generated from the environment are not always unwanted. This leads to failure in the detection of smaller echo thereby limiting the radar capability. Sometimes the clutter generated is comparatively larger than the echoes produced from the desired moving target.There will be multiple reflections from the objects in the environment, so the generated clutters will hinder the signal processing ability of radar.This is so because in case of moving target: So, the existence of these objects in the signal path creates unwanted echoes which are known as clutter.įor a moving target, tracing of echoes is a quite difficult task. These objects can be any building, tower, hills, ground, sea, etc. Whenever a radar system transmits a signal for the detection of a target in the environment then the signal may experience reflection from the objects in the path.
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