The goal here is to measure the PAi factors as a function of time. Maximum sensitivity is required, so the continuum correlator is used to determine these phases, possibly in DSB mode if the phase calibrator is really weak.
Since the measured phases are interpolated by continuous
functions of time, the 
ambiguities in phase must be
resolved before. Any other discontinuity must also be
identified (phase lock problem, focus change, etc...).
See the section 4 and 7 for details.
Phase data as function of time should be plotted, and a SOLVE PHASE/PLOT command will determine the phase functions. Several options are possible, in particular discontinuities can be specified; see CLIC manual for details. If the fit is satisfactory, these functions should be stored in the data file using the STORE PHASE command.