SET PHASE

 

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

  CLIC\SET PHASE [ABSOLUTE|RELATIVE]
      This command decides which phase correction is applied  to  the   data
    for  plotting and writing the final Table, in subsequent PLOT and TABLE.
    ABSOLUTE means do not use the phase calibration determined by the  SOLVE
    PHASE command, RELATIVE means apply it.

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

  CLIC\SET PHASE [ATMOSPHERE|NOATMOSPHERE]
      Switch ON and OFF the atmospheric phase  correction.  The  atmospheric
    phase  correction  is  based  on  monitoring  the atmosphere water vapor
    emission using the 1.3 mm receivers. The correction  parameters  are  in
    the  atmospheric  monitor  header  section, and are computed by commands
    MONITOR or ATMOSPHERE (this is normally done in real time for data taken
    since  November  1995). However the command MONITOR should still be used
    to precise the reference for the correction (see command MONITOR).  With
    SET  PHASE  ATMOSPHERE  the phase-corrected spectral data, if available,
    will be used.

    Note that the phase correction will  NOT  be  applied  if  it  has  been
    declared  invalid  for  a given scan, using the command STORE CORRECTION
    BAD or AUTO, except  if  SET  PHASE  NOFILE  is  in  effect.  See  these
    commands.

  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 BAD or AUTO, will be used,
    and the phase correction will 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 [INTERNAL|EXTERNAL]
      Switch between two modes of phase calibration.

    INTERNAL is the standard mode (default).

    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,  determined
    on  top  of  the  phase  curve from receiver 1, by using SOLVE PHASE and
    STORE PHASE with SET PHASE EXTERNAL in effect.

  CLIC\SET PHASE arguments ...
      Selects the way phases are determined.  With  arguments  DEGREES   the
    phases are expressed in degrees of angle, with RADIANS in radians ; with
    argument JUMPY  no  attempt  is  made  to  suppress  2pi  jumps  :   the
    determination  is  always [-pi,pi] ; while with argument "CONTINUOUS n",
    the phase jumps are limited to +/- pi,  that  is  the  phase  is  always
    chosen  in  the  range  [previous-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).