SET WEIGHTS

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SET WEIGHTS

            CLIC\SET WEIGHTS [TSYS ON|OFF] [CALIBRATION ON|OFF]
            [BASELINE ON exponent|OFF]

        Selects  the  way  data  weights are computed. These weights are used in
        particular by the command TABLE.

        Weights are always proportional to observing time.

        With TSYS ON, data is also weighted by  1/TSYS**2,  where  TSYS  is  the
        equivalent  system  temperature (the geometrical mean of the system tem-
        peratures of both antennas, for a given baseline). With TSYS  OFF,  this
        factor is not applied.

        With CALIBRATION ON, data is also weighted by 1/CAL**2, where CAL is the
        amplitude instrumental calibration factor (if any). If no amplitude  in-
        strumental  calibration  function  is applied (absolute amplitude), this
        weighting should have no effect. With CALIBRATION OFF, weights  are  not
        affected by amplitude calibration.

        With  BASELINE  ON exponent, data weights are additionally scaled by the
        projected   baseline   length   in   the   UV   plane    according    to
        (sqrt(U**2+V**2)/15.)**exponent.  This  can be used to give more or less
        weight to long projected baselines in subsequent fits. The exponent  ar-
        gument is mandatory when switching this mode on. With BASELINE OFF, this
        extra scaling is disabled. This option is not used by the TABLE command.

        Default is TSYS ON, CALIBRATION ON and BASELINE OFF.

        Use SHOW WEIGHTS to display the current settings.