next up previous contents index
Next: SOLVE GAIN Up: SOLVE Previous: SOLVE FIVE   Contents   Index


SOLVE FOCUS

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

    *** THIS HELP HAS NOT BEEN UPDATED FOR THE NGRX ***

    Find focus corrections from a FOCUS scan using a parabolic fit.  All fo-
    cus  scans  in  the current index are processed.  All continuum subbands
    and both side bands are averaged.  SET AVERAGE METHOD SCALAR  is  recom-
    mended.  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
    4 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.

    ****** ATF CORNER ******

    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).


Gildas manager 2018-11-19