The longer median width is less inf

The longer median width is less influenced by either the long or short wavelength amplitude trends. However, using a long median width might cause frequency bands with the same relative amplitudes to be anomalous in some parts of the gather and not in others. Suppose that two frequency bands had the same relative amplitudes when compared to surrounding traces (say, 200% of the 10 closest traces), but one band was located near offset a and the other near offset b. When the longer median width is used (green), the frequency band near offset a has a higher likelihood of being anomalous because the average amplitude there is larger than at offset b, but the median amplitude is the same. The MEDIAN_WIDTH parameters should be specified as long as possible provided any long-wavelength amplitude trend does not significantly change within the median width. Short wavelength trends that might be considered anomalous must be entirely contained within the median width. In general, the number of traces containing noise should be less than 25 percent of the total number of traces within the median width.