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.