February, 2012
The first step in performing a WFS correction is to collect one or more images. This is done by a different GUI for each secondary or mode, and will produce one or more image files with the file extension .fits. Once the files have been collected, the next step is to perform the centroid calculations. This produces a series of files, each of which contain the results of one step in the data reduction pipeline. These are all small ascii files.
The original f9 wfs software consisted of a Tcl script and a handful of compiled C programs. Because Tcl brain-damage prevents using pipes to communicate with C programs being used in this fashion, each program writes its output to a file which is then opened and read. This is why all of these files are produced, but it can be handy for post mortem analysis once the purpose and contents of these files is understood.
Filenames for a single wfs run would be:
manual_wfs_0000.fits manual_wfs_0001.fits manual_wfs_0001.center manual_wfs_0001.dao manual_wfs_0001.dao.av manual_wfs_0001.dao.av.zrn manual_wfs_0001.dao.reg manual_wfs_0001.dao.sub.zrn manual_wfs_0001.psf manual_wfs_0001.seeingor
auto_wfs_0000.fits auto_wfs_0001.fits auto_wfs_0002.fits auto_wfs_0002_ave.fits auto_wfs_0002_ave.center - single line, 2 values (center coordinates) auto_wfs_0002_ave.dao - 139 spot coordinates auto_wfs_0002_ave.dao.av - 139 spot coordinates auto_wfs_0002_ave.dao.av.zrn - 19 lines, zernicke coefficients auto_wfs_0002_ave.dao.reg - region file for DS9 with 139 spot locations auto_wfs_0002_ave.dao.sub.zrn - 19 zernicke coefficients auto_wfs_0002_ave.psf - IRAF PSF file for the 139 spots auto_wfs_0002_ave.seeing - one line, 2 numbers (rms and seeing)