Filename                               Reason     Bkg         V      RCAM      TCAM   Sigma
20210808.173817.ucomp.1079.l1.p7.fts        0    15.9      1.06       0.1       0.1    0.88
20210808.175853.ucomp.1079.l1.p7.fts        0    15.7      1.07       0.1       0.1    0.68
20210808.200628.ucomp.1079.l1.p7.fts        0    18.2      1.27       0.1       0.1    0.68
20210808.202459.ucomp.1079.l1.p7.fts        0    19.9      1.70       0.1       0.1    0.70
20210808.204726.ucomp.1079.l1.p7.fts        0    21.1      1.51       0.1       0.0    1.05

GBU bitmask codes
Code    Description
    1   spar guide control loop is below threshold (0.99)
    2   spar guider intensity below threshold (0.9 * 6.551 * exp(-0.05 * secz))
    4   median background is above threshold (35.0)
    8   median background is below threshold (5.0)
   16   spurious Stokes V signal is above threshold (8.0)
   32   the chi-squared of the occulter fit is above threshold (80.0)
   64   the difference of the image with the median is above threshold (1.5)

* indicates that the threshold values changed on the day