Survey multiple nights of acm data files to locate nights that have calibration images like bias or dark frames.

 

% acm_nights --help 
% acm_nights list.Date_1 none N   
% acm_nights list.Jan2018 /hetdata/data N 

Usage: acm_nights list.dates /hetdata/data Y 
arg1 - Name of file with list UT dates
arg2 - path to base directory (can be anything if a local BaseDir file is present) 
arg3 - run in verbose/debug mode