@e-koch: shouldn't it be `if read_beam`?  I want this section to be skipped... `if not read_beam` just doesn't make sense to me.
@e-koch: shouldn't it be `if read_beam`?  I want this section to be
skipped... `if not read_beam` just doesn't make sense to me.

e-koch/spectral-cube,keflavich/spectral-cube,radio-astro-tools/spectral-cube,low-sky/spectral-cube,jzuhone/spectral-cube