Dual PRF, Random Phase Processing

In random phase processing, the "seam" at the start of the second trip is always problematic, since the transmitter main bang and nearby clutter virtually always wipe out the first few second trip range bins.

At a constant PRF, the second trip seam is always at the same range, but in dual PRF random phase mode, the seam is different each ray.

Thresholded bins at the seam of the high PRF can be surrounded on either side by valid bins taken at the low PRF.

The 3x3 filter has the effect of interpolating the reflectivity and width data over the bins at the 2nd trip seam. Velocity data is also be filled-in using the nearest neighbor. The 2D filter mitigates much of the damage that is caused at the 2nd trip seam to make a nearly seamless display.