SIMPLE
|
FITS required; file conforms to
FITS standard.
|
BITPIX
|
FITS requried; 32 bits per pixel.
|
NAXIS
|
FITS required; number of axes.
Will be 2 or 3 for Kermit.
|
NAXIS1
|
Size of first (x) axis.
|
NAXIS2
|
Size of second (y) axis. Will
always equal NAXIS1 for Kermit.
|
NAXIS3
|
(optional) Size of third (z)
axis. Usually not present (implicitly 1) but will exist for CDS no
subtraction or fast subarray modes.
|
EXTEND
|
Fits required; file may contain
extensions.
|
COMMENT
|
Observer's comment about object.
|
ORIGIN
|
Who/where did this file
originate?
|
TELESCOP
|
Which telescope took this data?
|
CREATOR
|
Which software created this file?
|
DATE-OBS
|
(Approximate) start of
observation in UTC. See note.
|
FILENAME
|
The original filename this data
was saved as.
|
EXPTIME
|
Exposure time. See this discussion.
|
COADDTIM
|
Time per single coadd. See this discussion.
|
NCOADDS
|
Number of exposures coadded in
hardware.
|
NREADS
|
Number of Fowler Sample reads
per exposure.
|
NRESETS
|
Number of times the array was
reset between subsequent exposures or coadds.
|
NFRAMES
|
Number of frames read out in fast subarray mode.
|
READMODE
|
Read
mode flag: 0 for single read, 1 for CDS, and 3 for CDS no
subtraction.
|
READMD_S
|
Read
mode string; the same as READMODE but formatted as a descriptive
string rather than just an integer.
|
BIASFILE
|
Which biasfile, if any, was
automatically subtracted during readout?
|
TIM_APP
|
DSP Timing board application
number
|
TIM_PXMD
|
DSP Timing board pixel mode. 0
is fast clocking, 1 is slow clocking, and 2 is slow clocking with the
reset line down.
|
TIM_PXTM
|
DSP Timing board readout time
per pixel in microseconds. See this discussion.
|
TIM_RTIM
|
DSP Timing board readout time
for the current subarray - the product of TIM_PXTM*NAXIS1*NAXIS2.
|
TIM_ITIM
|
DSP Timing board integration
time.
|
SUB_COAD
|
Coadder used for current
subarray. See this discussion.
|
SUB_OFFS
|
Offset used for current
subarray. See this
discussion. |
SUB_X
|
Leftmost pixel of current
subarray. See this
discussion. |
SUB_Y
|
Lowest pixel of current
subarray. See this
discussion. |
CCDSEC
|
Subarray region coordinates. See
this
discussion. |
AOFFST[00-73]
|
Analog offsets applied to each
ADC channel. These numbers are the input values to the DACs; To convert
to volts use V = A/409.6 - 5
|
OBJECT
|
What the observer thinks we're
looking at.
|
PROGRAM
|
Name of the observation campaign
or task.
|
FILTER
|
Name of current filter position
|
PUPILMSK
|
Name of current pupil mask
|
M2SLIDE
|
Name of current M2 mirror.
|
FOCUS
|
Focus
position, in motor counts.
|
EXP_MODE
|
Exposure mode string.
|
MOTORS
|
Motor
positions, in motor counts. The positions are listed in order as
(Filter, Pupil, M2, Focus).
|
IMGFMT
|
Image format.
|
FSM_LOOP
|
Coronagraph FSM Loop status at start of exposure; Open, Closed, or
Unknown.
|
HISTORY
|
If the FSM loop status changes
during the exposure, the change and time are recorded here.
|
HANGLE
|
Target's Hour Angle as computed by
the coronagraph computer.
|
AIRMASS
|
Target's Airmass as computed by
the coronagraph computer.
|
PARANGLE
|
Target's Parallactic Angle as computed by
the coronagraph computer.
|
ALTITUDE
|
Target's Altitude as computed by
the coronagraph computer.
|
AZIMUTH
|
Target's Azimuth as computed by
the coronagraph computer.
|