PRIMARY

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PRIMARY

              SHOW PRIMARY [PLANE|FIELD Kn] [First Last]

        Show some sub-cube of the (4-D) Primary Beams.

        The  2nd  argument  indicates  whether SHOW shows all Fields for a given
        frequency plane (PLANE keyword), or all Frequency-dependent beams for  a
        given  Field  (FIELD keyword). The 2nd and 3rd arguments are optional if
        the beam is only 3-D, which occurs for a single field or a frequency-in-
        depedent beam in Mosaics (narrow band approximation).