UV_FIELDS /CENTER

        [CLEAN\]UV_FIELDS RaVar DecVar [Unit] /CENTER Ra Dec /FILE File

    Specify the reference center (Pointing and Phase) of  the  Mosaic  UV  table
    with  Fields ID.  In this case, RaVar and DecVar are true Ra and Dec (angles
    in the specified Unit), not Offsets.  The Offsets are computed from the pro-
    jection information in the UV table.

    Ra and Dec should be in usual sexagesimal notation.

    Without /CENTER, RaVar and DecVar are Offsets from the  Phase  and  Pointing
    center  of  the  Mosaic,  as given in the UV data header, unless Unit is AB-
    SOLUTE.