Fixed width clutter filters

This filter removes a specified number of spectrum components (5 in the following example) and then interpolates across the gap using the minimum of a specified number of "edge points" (2 in the example) to anchor the interpolation at each end of the gap.

This is a fairly simple legacy approach that uses interpolation to repair the damage caused by the removal of components.

Figure 1. Fixed Width Clutter Filter Examples

This procedure attempts to preserve the noise level and/or overlapped weather targets. The result is that more accurate estimates of dBZ are obtained. In extreme cases when the weather spectrum is very narrow, there can still be some attenuation of weather if a broad filter is selected.