The images are in:     /home/sco/acm_SBSKY   (see list.04) 
I do analysis 04 in:   /home/sco/acm_reds_sco2019/Analyses/Analysis03/data 

% ls -1 /home/sco/acm_SBSKY/*fits > list.04 

I make a table file with fits2table. Here is the PARAMS The PARAMSfile is 
what determine what will be assembled i the table files.
 
% cat PARAMS
WAVELEN    Filter wavelength (angs) 
UTHOURS    Hours since 0hUT
UTDATE     UT date (YYYYMMDD)
RSTRT      Radius position of tracker at start (mm)
AZHET      HET structure AZ (deg)
MILLUM     percentage moon illumination
PHIMOON    angle of separation to moon (deg)
ZPSEC      ZP for a 1-sec exposure
ZPERR      mean error of ZPSEC
SKYSB      sky surface brightness (mags per sq.arcsec)
SKYSBERR   mean error of SKYSB

To get tables: 
% ACM_ANALYSIS_TABLES list.04 PARAMS N

Make a nice plot: 
% Generic_Points N                        # edit "xyplotter_auto.pars" 

% xyplotter_auto A1 PHIMOON SKYSB 20 N
% xyplotter_auto A1 MILLUM PHIMOON 21 N