UV_SHIFT

        [CLEAN\]UV_SHIFT  [CenterX CenterY UNIT] [ANGLE Angle] [/FILE FileInOut]

    Shift the current (if no /FILE option is present) or specified (if the /FILE
    option  is  here) UV table (single field or mosaic) to a common phase center
    and/or rotate it.

    Angle is desired position angle of the  Celestial  North  from  the  Y  axis
    (counted positive towards East, i.e. counter-clockwise in usual astronomical
    images), in Degree. It is thus an absolute value.

    If  UNIT  is ABSOLUTE, CenterX and CenterY are absolute coordinates in usual
    sexagesimal notation.

    If not, CenterX and CenterY are offsets in the specified angular unit  (SEC-
    OND, MINUTE, DEGREE or RADIAN).



    Although UV_MAP also provides a direct possibility to re-center the image on
    a  specified  projection (phase) center cmobined with a rotation of the main
    axes, the modified visibilities cannot be saved on file. It is sometimes re-
    quired to do this for specific use. UV_SHIFT provides this possibility,  and
    the shifted UV table can be written using command WRITE UV.

    UV_DEPROJECT  includes  the  UV_SHIFT  capabilities, but also has additional
    functions, and a different syntax.