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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 focus
scans in the current index are processed. All continuum subbands and both
side bands are averaged. 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 interval
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 azimuth,
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 parameter.
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
2011-09-07