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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