SOLVE FOCUS

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SOLVE FOCUS

            CLIC\SOLVE FOCUS [/PLOT] [/COMPRESS time_max] [/PRINT]
            [/OUTPUT filename [NEW][OLD]] [/TOTAL] [/FIX par1 [value] ...]

        Find focus corrections from a FOCUS scan using a parabolic fit.  All fo-
        cus  scans in the current index are processed. SET AVERAGE METHOD SCALAR
        is recommended.  The fits may be displayed with option /PLOT.

        The option /COMPRESS may be used to average data in a given time  inter-
        val before processing, to improve the signal-to-noise ratio.  Default is
        5 seconds.

        The presence of option /PRINT produces a procedure  file  (INTER_OBS:fo-
        cus.obs),  to  be  used  in OBS for introducing the fitted focus offset.
        With option /OUTPUT, results of the fit, together with elevation and az-
        imuth, are written in an output ASCII file, for further examination.

        With  option /TOTAL, SOLVE FOCUS uses the total power to solve for axial
        focus errors. In that case, option /FIX may be used to fix  one  parame-
        ter. Possible parameters are:

            FOCUS: the axial focus error (mm)
            PEAK: the peak amplitude, in total power units
            WIDTH: the HPW of focus curve  (mm)
            ZERO: the off-source zero level, in total power units

        With  /TOTAL, /COMPRESS does the ON-OFF combination if in beam switching
        mode. In that case ZERO is preferrably fixed to zero (e.g.  SOLVE  FOCUS
        /TOTAL /COMPRESS /PLOT /FIX ZERO 0).