From AstroWiki

DR: Flags

The functions read_flags and index_good_frames (written by Roy van Boekel) do the following:

• Load a flags file: flags=read_flags('tag') (don't add flag.fits!)
• Load a groupdelay file: gd = oirgetdata('tag.groupdelay.fits')
• create the array of good frames: goodframes = index_good_frames(gd,flags)

MIA+EWS> help,goodframes
GOODFRAMES      INT       = Array[16000]
MIA+EWS> print,goodframes[0:10]
       0       0       1       1       1       1       1       1       0       0       1
MIA+EWS> print,total(goodframes)
      9951.00