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SOLVE POINTING
CLIC\SOLVE POINTING [beam] [/PLOT] [/COMPRESS [timex]] [/PRINT]
[/OUTPUT filename [NEW|APPEND] [FLUX] [TPOINT]]
[/TOTAL] [/FIX param1 [value1] param2 [value2] ... ]
Find pointing corrections from POINTING scans. All pointing scans in the
current index are processed by a gaussian fit. Its width can be fixed if
the argument 'beam' is given (in arcsec). 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:point-
ing.obs), to be used in OBS for introducing the fitted pointing offset.
The results may also be written on an output ASCII file if /OUTPUT is giv-
en. The file is given extension .lis by default; a new file is opened ex-
cept if APPEND is given as a second argument of option /OUTPUT. The file
is by default in a format suitable for the determination of a pointing
model (program POINT at BURE). The presence of optional argument FLUX
changes the output format for the determination of relative fluxes (by AS-
TRO). With argument TPOINT, the output is written in a format suitable for
processing by the TPOINT program.
****** ATF CORNER ******
With option /TOTAL, SOLVE POINTING uses the total power to solve for
pointing errors. In that case, option /FIX may be used to fix one parame-
ter. Possible parameters are:
AZ: the azimuth collimation error (arc sec.)
EL: the elevation collimation error (arc sec.)
PEAK: the peak amplitude, in total power units
WIDTH: the HPBW (arc sec.)
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 POINTING
/TOTAL /COMPRESS /PLOT /FIX ZERO 0).
Gildas manager
2011-09-07