OVERRIDE

##
OVERRIDE

            MIRA\OVERRIDE TEM[PLOAD] | EFF[ICIENCY] | GAIN[IMAGE] value1 value2 |
                       TAMB[PID] value1 value2 [/FEBE ifb|all] [/RESET]

        OVERRIDE allows to change parameters relevant for calibration. By default,
        the parameters for frontend-backend combination 1 are changed (see below
        for option /FEBE). Instead of value1 and value2, asterisks may be used to
        leave the parameter unchanged (see below). The parameters changed are
        displayed on the screen. If the scan loaded is a calibration (i.e. sky,
        hot load, cold load), the calibration parameters are automatically
        re-calculated, using the new values for the load temperatures and/or
        efficiencies. The calibration parameters in the raw data are replaced by tho
        set with OVERRIDE until reset by OVERRIDE /RESET

        Keyword TEM[PLOAD]:     changes the temperatures of the cold load (value1)
                                and of the hot load (value2).

        Keyword EFF[ICIENCY]:   changes the forward efficiency (value1) and the
                                beam efficiency (value2).

        Keyword GAIN[IMAGE]:    changes the the suppression of the image band
                                (value1).

        OVERRIDE /FEBE ifb|all  This is to specify the frontend-backend combination
                                (ifb) for which the calibration parameters are to
                                be changed. Keyword "all" changes the parameters
                                for all frontend-backend combinations in the
                                current scan.

        OVERRIDE /RESET         Resets all calibration parameters to default (raw da
                                values). A new calibration has to be read in order t
                                activate the change.

        EXAMPLES:
        OVERRIDE TEMPLOAD * 300 /FEBE all  Changes the hot load temperature for all
                                           frontends to 300 K. All cold load
                                           temperatures are left unchanged.

        OVERRIDE EFFICIENCY 0.95           Changes the forward efficiency of
                                           frontend 1 to 0.95. All beam
                                           efficiencies are unchanged.

        OVERRIDE GAINIMAGE 0.1 /FEBE 1     Changes the sideband suppression for the
                                           receiver in frontend-backend combination
                                           number 1 to 0.1.

        OVERRIDE TAMBPID -7.5 712     Changes ambient outside temperature and
                                           pressure to -7.5 deg C and 712 hPa.