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    Selects the way the weights written in the output file  by  the  command
    TABLE are computed.

    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  system  tempera-
    ture of both antennas, for a given baseline). With TSYS OFF, this weight
    factor is turned off.

    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.

    Default is TSYS ON and CALIBRATION ON, which results in weights equal to
    1/sigma^2, where sigma is the thermal noise in the data.

Gildas manager 2022-01-17