DATE-OBS - Unreliable date of exposure begin, don't use this keyword
TIME-OBS - Unreliable time of exposure begin, don't use this keyword
TIME-END - Unreliable time of exposure end, don't use this keyword
DATE-BEG - Accurate UT date and time of exposure start time
ITIME - Requested integration time in milliseconds of each coadd. Note, actual itegration time of each coadd is in the TRUITIME keyword.
TRUITIME - True integration time in seconds per coadd
COADDS - Number of coadds
GROUPS - Number of sampling groups
NUMREADS - Number of reads
READTIME - Detector readout time in seconds.
RESETS - Number of resets before exposure
SAMPMODE - Sampling mode. Can be MCDS, CDS, UTR, or Single.
BUNIT - Units of pixel value, usually 'ADU per coadd'
STARTX - Sub-array start x pixel
STARTY - Sub-array start y pixel
ENDX - Sub-array end x pixel
ENDY - Sub-array end y pixel
PSCALE - Pixel scale in arcsec/pixel for science camera, should be 0.033
RMPRESET - Number of resets in ramp
RMPREADS - Number of reads in ramp
DMPDROP - Number of drop frames in ramp
RMPGROUP - Number of groups in ramp
RDITIME - Time between sampling groups in seconds
ABORTED - Exposure was stopped before completion, either T or F
COADDONE - Number of coadds actually completed
READDONE - Reads actually completed in this coadd
GRPSDONE - Groups actually completed in this coadd
IGNORDRD - Number of discarded initial reads
SATURATE - Detector saturation level (DN) from config file, usually 33000
SYSGAIN - System gain in e-/ADU, usually 2.15

APERNAM - Dewar aperture wheel, named position
FILT1NAM - Dewar filter wheel 1, named position
FILT2NAM - Dewar filter wheel 2, named position
SCIFILT - External (warm) science filter wheel position

LENSLETN - Lenslet, named position. Can be 8x, 16x, or 30x.
TTDICHRN - Tip/Tilt dichroic position. Can be Splitter or Mirror.
LOOPSTAT - AO loop state. Can be Open or Closed.
LOOPSUB - AO Loop subaperture mode. Can be 8xLGS, 16xLGS, or 30xLGS.
TWTRGAIN - AO tweeter DM integrator gain
WOOFGAIN - AO woofer DM integrator gain
WFSRATE - WFS camera frame rate in Hz
TTRATE - Tip/tilt camera frame rate in Hz

SCRPTSTA - Scripting message
SCRPTMSG - Scripting status
AUTOCLOS - Auto-close AO loops after a dither. Can be True or False.
AUTOOPEN - Auto-open AO loops before a dither. Can be True or False.
FPDISPXR - Requested X field steering in arcsec.
FPDISPYR - Requested Y field steering in arcsec.
FPDISPXI - Initial WFS guide star offset, X, in arcsec.
FPDISPYI - Initial WFS guide star offset, Y, in arcsec.
NOD_TELE - Nod telescope in dither script. Can be True or False.
NOD_WFS - Nod WFS field steering mirrors in dither script. Can be True or False.
NEXPOSE - Number of completed exposure in series.

AOS_TIME - Time of seeing data collection.
AOS_AGE - Age of seeing data collection in seconds.
AOSSFILE - IR seeing image file. Not yet implemented.
AOSSBAND - IR filter band of seeing image. Not yet implemented.
AOSSFWHM - FWHM of star on IR image. Not yet implemented.
AOSSR0 - R0 from IR image. Not yet implemented.
AOSTFILE - First TT seeing datafile.
AOSTFWHM - Seeing measurement of FWHM of star on TT sensor in arcseconds.
AOSTR0 - R0 from TT sensor, in cm.
TELMTIME - Time of WFS telemetry data.
TELMAGE - Age of telemetry data in seconds.
TELMFILE - Name of the telemetry data file.
AO_R0 - R0 from telemetry data, in cm.
AO_V - Wind speed from telemetry, in m/s.
AO_F0 - Telemetry low frequency breat, in Hz.
AO_SN - Telemetry noise floor, nm^2/Hz.
AO_P - Mid frequency power law fit, f^-p.
AO_Q - Low frequency power law fit, f^-q.
GIDESTAR - Telemetry star name.
WFS_TRAN - Estimated throughput to WFS, percent.