INTEGER ALL%DROP[2] This is an integer array giving
the number of edge channels ignored when reading a UV table. Edge chan-
nels may have different weights than the other ones, especially for ALMA
data because of the off-line Doppler correction.
Such low weights edge channels are automatically dropped for Single
fields, so you can use ALL%DROP = 0, but not yet for Mosaics, where
ALL%DROP = 5 is more appropriate.