SET PHASE

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SET PHASE

            CLIC\SET PHASE [ABSOLUTE|RELATIVE] [ANTENNA|BASELINE]
            [INTERNAL|EXTERNAL] [ATMOSPHERE|NOATMOSPHERE] [FILE|NOFILE]
            [WVR|NOWVR] [TOTAL|NOTOTAL]
            [DEGREES|RADIANS] [JUMPY|CONTINUOUS]

        CLIC\SET PHASE ABSOLUTE|RELATIVE

            This command decides whether the phase calibration is applied or not
            to  the  data for plotting and writing the final UV table, in subse-
            quent PLOT and TABLE commands. ABSOLUTE means do not use  the  phase
            calibration  determined  by  the SOLVE PHASE command, RELATIVE means
            apply it.

        CLIC\SET PHASE INTERNAL|EXTERNAL

            Switch between two modes of phase calibration.

            INTERNAL is the standard mode.  In  EXTERNAL  mode  the  calibration
            curve  from  another  receiver may be used (as stored by STORE PHASE
            /RECEIVER r); on the top of this a second  order  calibration  curve
            may be determined (using SOLVE PHASE) and stored as usual. This does
            not erase any INTERNAL calibration curve previously stored.

            For example, using receiver 2:

            SET PHASE INTERNAL RELATIVE: use the  phase  curve  determined  from
            Rec. 2 only

            SET  PHASE  EXTERNAL ABSOLUTE: use the phase curve from Rec. 1 only,
            as stored with STORE PHASE /RECEIVER 1

            SET PHASE EXTERNAL RELATIVE: use the phase curve from Rec 2,  deter-
            mined  on  top  of  the phase curve Rec. 1, by using SOLVE PHASE and
            STORE PHASE with SET PHASE EXTERNAL in effect.

            SET PHASE INTERNAL  is recommended for Receiver 1,  SET PHASE EXTER-
            NAL for Receiver 2.

        CLIC\SET PHASE ANTENNA|BASELINE

            Switch  between Antenna-based and Baseline-based phase calibrations.
            This switch will be active for SOLVE PHASE (calibration curve deter-
            mination),  STORE  PHASE  (calibration curve storing operation), and
            SET PHASE RELATIVE (application).  Both baseline-based and  antenna-
            based calibration curves may be stored alongside in the data header,
            independently of each other. SET PHASE ANTENNA is recommended.

        CLIC\SET PHASE ATMOSPHERE|NOATMOSPHERE

            Force CLIC to use or not the real-time atmospheric phase correction.
            The  atmospheric  phase correction is based on monitoring the atmos-
            phere water vapor emission using either the total power measured  by
            the  1.3  mm  receivers or the 22 GHz water vapor radiometers. It is
            applied in real-time to each dump before computing the scan-averaged
            quantities  (spectra and continuum); these are further corrected for
            the average atmospheric phase, hence leading to  phases  essentially
            not modified, but to improved amplitudes (correction of the decorre-
            lation). This phase-corrected scan-averaged dump  will  be  used  by
            CLIC after SET PHASE ATM has been issued.

            The  phase  correction  will NOT be used if it has been declared in-
            valid for a given scan, using the command STORE  CORRECTION,  except
            if SET PHASE NOFILE is in effect. See these commands.

            Note  that the continuum 1 sec dumps are not corrected in real-time,
            and are therefore not affected by the  SET  PHASE  ATM  command.  To
            avoid any confusion, SET PHASE ATM forces SET AVER SCAN.

        CLIC\SET PHASE FILE|NOFILE

            Turn ON of OFF the effect of the STORE CORRECTION command.

            If SET PHASE ATMOSPHERE FILE, the information on the validity of the
            phase correction declared by STORE CORRECTION will be used, and  the
            phase  correction will thsu be done only on scans validated by STORE
            CORRECTION.

            If SET PHASE ATMOSPHERE NOFILE, this information will  be  bypassed,
            and the phase correction will be done for all scans.

        CLIC\SET PHASE WVR|NOWVR

            Switch  ON or OFF the off-line atmospheric phase correction based on
            the WVR data. All data (individual as well as  scan-averaged  dumps)
            are  affected.  It  is necessary to have run the WVR command before.
            SET PHASE WVR forces SET PHASE NOTOTAL.

        CLIC\SET PHASE TOTAL|NOTOTAL

            Switch ON or OFF the off-line atmospheric phase correction based  on
            the  1.3  mm total power monitoring. All data (individual as well as
            scan-averaged dumps) are affected. It is necessary to have  run  the
            MONITOR command before. SET PHASE TOTAL forces SET PHASE NOWVR.

        CLIC\SET PHASE DEGREE|RADIANS

            Select the unit in which the phases are plotted.

        CLIC\SET PHASE JUMPY|CONTINUOUS n

            Selects  the  way phases are determined.  With argument JUMPY no at-
            tempt is made to suppress 2pi jumps:  the  determination  is  always
            [-pi,pi].  With argument "CONTINUOUS n", the phase jumps are limited
            to +/- pi, that is the phase is always chosen in the  range  [previ-
            ous-pi,previous+pi],  n being the number of points averaged together
            to estimate the 'previous' phase (default is 1, higher values are to
            be used in noisy cases).