FITS Headers

LCOGT FITS Data Products: Format and Descriptions

The following table contains brief descriptions of the FITS header keywords for each raw or processed frame in the LCOGT Archive. FITS header keywords with an 'L1'prefix are from Level 1 processing (quicklook or final reduction) and will not be present in raw data.

The columns in the following table are:

  • Keyword: The FITS header keyword.
  • Format: The ASCII-equivalent format of the field in the Catalog, expressed in "C"-readable notation.
  • Units: The units of the parameter. A blank in this column means the parameter is dimensionless or non-numeric.
  • Description: A brief description of the parameter and its values.
  • Documentation: When needed, a longer description of the parameter and its values.

Keyword Format Units Description Documentation
agcam 55s   Camera used for autoguiding Camera used for autoguiding
agdec 14.7f deg Declination of the guide star Declination of the guide star
agfilst 8s   Autoguider filter state Autoguider filter state. One of: {DEPLOYED, STOWED, ERROR, UNKNOWN, (N/A)}
agfilter 55s   Autoguider filter Common astrophysical name of the Autoguider filter or 'air' for no filter.
agfiltid 55s   Autoguider filter id Autoguider filter id in the LCOGT filter name form of 'XXXX-YY-ZZZ' where 'ZZZ' is the filter set number
agfocdmd 14.7f mm Demanded autoguider focus position Demanded autoguider focus position
agfocoff 14.7f mm Autoguider relative focus offset Observer/algorithm requested defocus term which records the differential between the primary CCD focal plane position and the AG focal plane relevant to the particular FITS image. If no autoguider is used or both instruments are at the same position relative to the optical focal plane, this term defaults to 0.000. e.g. if both primary CCD and auxiliary CCD are in focus this term is 0.0, but if an observer has requested a primary CCD defocus of +1.215 mm, while wanting an autoguider in focus, FOCOFFS = 1.215 and FOCAUX = -1.215.
agfocst 20s   Autoguider focus state Autoguider focus state. One of: {INVALID, UNKNOWN, INITIALISING, UNHOMED, HALTED, HOMED, INITIALIZED, MOVING, HOMING, INTERLOCKED, LIMITED, WARNING, FAILED}
agfocus 14.7f mm Autoguider focus position Autoguider focus position
agfwhm 14.7f arcsec Autoguider star FWHM The full width, half maximum of the star in the autoguider
aggmag 14.7f mag Autoguider guide star mag Autoguider guide star mag
aglckfrc 14.7f % Percentage of LOCKED autoguider frames The percentage of autoguider exposures taken during the science frame that were LOCKED.
agmirdmd 55s mm Demanded autoguider mirror position Demanded autoguider mirror position
agmirpos 55s mm Autoguider mirror position Autoguider mirror position
agmirst 12s   Autoguider mirror state Autoguider mirror state. One of: {INVALID, UNKNOWN, INITIALISING, UNHOMED, HALTED, HOMED, INITIALIZED, MOVING, HOMING, INTERLOCKED, LIMITED, WARNING, FAILED}
agmode 8s   Autoguider mode Autoguider mode. One of {OFF, ON, AUTO}
agra 14.7f deg Right Ascension of the guide star Right Ascension of the guide star
agstate 25s   Autoguider software state Autoguider software state. One of: {null, READING_OUT, ABORTING, GUIDING_OPEN_LOOP, GUIDE_SOURCE_LOST_TEMP, GUIDE_SOURCE_LOST, FAILED, CONFIGURING, IDLE, GUIDING_CLOSED_LOOP, EXPOSING, INIT, ACQUIRING, TRKOK, ACQFAIL, NOSTAR, OFF}
airmass 11.7f   Effective mean airmass Effective mean airmass (mean airmass for the center of the frame)
altdmd 14.7f deg Altitude axis demand Altitude axis demand
altitude 14.7f deg Altitude axis position Altitude axis position
altstat 8s   Altitude axis state Altitude axis state: {INVALID, OKAY, INIT, STANDBY, WARNING, FAILED, TIMEOUT, SUSPEND, OFF}
amend 11.7f   Airmass at end of observation Airmass at end of observation (when the shutter closes)
amstart 11.7f   Airmass at the start of observation Airmass at the start of observation (when the shutter opens)
azdmd 14.7f deg Azimuth axis demand position Azimuth axis demand position
azimuth 14.7f deg Azimuth axis position Azimuth axis position
azstat 8s   Azimuth axis state Azimuth axis state: {INVALID, OKAY, INIT, STANDBY, WARNING, FAILED, TIMEOUT, SUSPEND, OFF}
biassec 55s binned pixel Region of binned CCD for bias/overscan Section of the recorded image containing overscan or prescan data. This will be in binned pixels if binning is done. Multiple regions may be recorded and specified, such as both prescan and overscan, but the first section given by this parameter is likely to be the one used during calibration.
blkairco 55s   The maximum airmass allowed The maximum airmass allowed for the observation.
blkedate yyyy:mm:dd hh:mi:ss.sss UTC The date when block will expire. The date when block will expire. The value string for date uses the YYYY-MM-DDThh:mm:ss.sss format, following the FITS standard restriction of the ISO 8601 format.
blkmndst 10.4f deg Minimum lunar distance req for block Minimum acceptable distance from the moon allowed.
blkmnph 10.6f 0-1 Maximum lunar phase required for block Maximum lunar phase required for block. Moon phase between 0.0 (New moon) and 1.0 (Full moon).
blknomex 10.1f s Nominal block execution time Block nominal execution time based on number of exposures, filter changes, slews and any mosaicing options within the group.
blksdate yyyy:mm:dd hh:mi:ss.sss UTC The date of the block start. The date of the block start. The value string for date uses the YYYY-MM-DDThh:mm:ss.sss format, following the FITS standard restriction of the ISO 8601 format.
blkseeco 55s   Minimum seeing required for block Possible values are: ANY,ATROCIOUS, POOR,GOOD,EXCELLENT,NONE. Currently these are mapped to no seeing limit (ANY/ATROCIOUS), seeing <3.0" (POOR), seeing <1.3" (GOOD), seeing <0.8" (EXCELLENT).
blktrnco 55s   Minimum transparency required for block The amount of transparency (cloud cover) that can be tolerated.
blktype 55s   The type of constraints from obs group The type of constraints required by the observation group. Currently one of {MONITOR,FLEXIBLE,FIXED,NONE,UNKNOWN}.
blkuid 55s   Unique ID for the block. Unique ID for the block.
cat_dec 12s sDD:MM:SS.ss Catalog Dec of the object Catalog Declination of the object
cat_epoc 10.1f year Catalog epoch of the object coord The epoch (time) of the catalog co-ordinates. This is needed to apply the correct amount of proper motion to the target co-ordinates to get them to the current epoch of date.
cat_ra 12s HH:MM:SS.ss Catalog RA of the object Catalog Right Ascension of the object
catver 55s   Ver no. of catalog data dictionary Ver no. of catalog data dictionary
ccdatemp 13.7f deg C Actual CCD temperature Actual CCD temperature
ccdsec 55s pixel Region of the full CCD that was read out The unbinned section of the logical CCD pixel raster covered by the amplifier readout in section notation. The section must map directly to the specified data section through the binning and CCD to image coordiante transformation. The image data section (DATASEC) is specified with the starting pixel less than the ending pixel. Thus the order of this section may be flipped depending on the coordinate transformation (which depends on how the CCD coordinate system is defined).
ccdsesig 10.3f mK CCD temperature control servo error CCD temperature control servo error
ccdstemp 13.7f deg C Required CCD temperature Required CCD temperature
ccdsum 55s   CCD on-chip summing/binning CCD on-chip summing given as two integer numbers. These define the summing of CCD pixels in the amplifier readout order. The first two numbers give the number of pixels summed in the serial and parallel directions respectively.
ccdxpixe 14.7e m Physical CCD pixel size along X Unbinned physical size of pixels, in X direction. Projected pixel size on the sky in arcsec or wavelength is given by PIXSCALE.
ccdypixe 14.7e m Physical CCD pixel size along Y Unbinned physical size of pixels, in Y direction. Projected pixel size on the sky in arcsec or wavelength is given by PIXSCALE.
cd1_1 21.13e deg/pix Transformation matrix element Change in RA per pixel along Axis 1 and evaluated at the reference pixel. Assuming no rotation and square pixels of the same size, this produces the values in CD1_1 and CD2_2 (and 0.0 in the other two as there is no skew/rotation). The signs of CD1_1/2_2 say which direction the values increase. For a "normal CCD" with North up and East left, CD1_1 is -ve and CD2_2 is +ve.
cd1_2 21.13e deg/pix Transformation matrix element Change in RA per pixel along Axis 2 and evaluated at the reference pixel
cd2_1 21.13e deg/pix Transformation matrix element Change in Dec per pixel along Axis 1 and evaluated at the reference pixel
cd2_2 21.13e deg/pix Transformation matrix element Change in Dec per pixel along Axis 2 and evaluated at the reference pixel
cdelt1 19.10e   Pixel scale axis 1 Pixel scale axis 1
cdelt2 19.10e   Pixel scale axis 2 Pixel scale axis 2
confmode 55s   Configuration mode for the camera The current camera modestring defining the camera configuration. This is of the form: _++x ++__<# of bits> where is one of {cv,em} (for convention, electron-multiplying respectively and <# bits> is the no. of bits of digitization in the ADC.
confname 55s   The name of the instrument configuration The name of the instrument configuration used during the observations.
cra 20s   Sexagesimal version of RA Sexagesimal version of RA
crota2 13.7f   Image rotation Image rotation
crpix1 16.5f   Axis 1 reference pixel Reference pixel along axis 1 of the full detector matrix. When possible, it is recommended to define the reference pixel (possibly with fraction if the accuracy is achieved) at the point where the telescope's optical axis intersects the detector.
crpix2 16.5f   Axis 2 reference pixel Reference pixel along axis 2 of the full detector matrix. When possible, it is recommended to define the reference pixel (possibly with fraction if the accuracy is achieved) at the point where the telescope's optical axis intersects the detector.
crval1 13.7f   Value of reference pixel on axis 1 Value of reference pixel on axis 1
crval2 13.7f   Value of reference pixel on axis 2 Value of reference pixel on axis 2
ctype1 13s   Type of RA WCS projection Type of RA WCS projection
ctype2 13s   Type of Dec WCS projection Type of Dec WCS projection
darkcurr 10.3f e/sec Detector dark current Detector dark current
datadicv 55s   Data dictionary ver in LCOGT pipeline The value field shall contain a character string identifying the version number of this data dictionary that the file conforms to.
datasec 55s binned pixel Section of CCD containing data Mapping of the CCD section to image coordinates.
date yyyy-mm-dd hh:mi:ss UTC Date the FITS file was written The UTC date and time the file was written (not the time of the observation).
date_obs yyyy-mm-dd hh:mi:ss.sss UTC Start date and time of observation The start date and time in the UTC system of the observation corresponding to the instant of shutter open.
day_obs 8s UTC Date at start of local observing night Date at start of local observing night. This is the date in the UTC timescale at 15:00 site local time, with the timezone offset from UTC calculated from the longitude divided by 15 and rounded to the whole hour (this is done to avoid daylight saving/summer time changes and problems).
dec 14.7f   Declination at array center Declination at array center
dectel 12s sDD:MM:SS.ss Dec where telescope is pointing ero-padded and signed sexagesimal mean Declination of where telescope is pointing
dectrack 10.4f arcsec/s Non-sidereal tracking in Dec Non-sidereal tracking in Dec. These values should default to 0.0 in the POND and be passed down.
detectid 55s   The name/serial number for the detector The name/serial number for the detector
detector 55s   Type of the detector Type of the detector in the instrument
detsec 55s binned pixel Section of the CCD for useful data Detector data section (Required by DS9 for multi-amp).
detsize 55s pixel Detector size The logical unbinned size of the detector in section notation. Normally this would be the physical size of the CCD unless drift scanning is done. This is the full size even when subframe or binned readouts are done.
enc1stat 8s   Enclosure shutter 1 state Shutter 1 is the upper shutter in the case of a 1.0m Ash dome and the shutter closest to the pole in the case of a 0.4m Aqawan enclosure. One of a ShutterStatusCode enum: {OPEN, CLOSED, OPENING, CLOSING, STOPPED, ERROR, UNKNOWN}
enc2stat 8s   Enclosure shutter 2 state Shutter 2 is the lower shutter in the case of a 1.0m Ash dome and the shutter furthest away from the pole in the case of a 0.4m Aqawan enclosure. One of a ShutterStatusCode enum: {OPEN, CLOSED, OPENING, CLOSING, STOPPED, ERROR, UNKNOWN}
encaz 14.7f deg Enclosure Azimuth The Enclosure Azimuth for a rotating enclosure ('N/A' should be entered for a non-rotating enclosure) measured in decimal degrees westwards from the South.
encid 55s   ID code of the telescope enclosure ID code of the telescope enclosure
enclosur 55s   Name of the telescope enclosure Name of the telescope enclosure
encrligt 10s   Enclosure red lights state Enclosure red lights state
encwligt 10s   Enclosure white lights state Enclosure white lights state
engstate 14s   Engineering override state Whether the telescope is an engineering override state. One of: {ENABLED, DISABLED}.
eopsrc 55s   Source of Earth Orient. Param values The source of the EOP (Earth Orientation Parameters) UT1-UTC, polar motion X & Y co-ordinates reported in UT1-UTC, POLARMOX, POLARMOY. This is usually the IERS Bulletin A which the TCS obtains by downloading from http://maia.usno.navy.mil/ser7/ser7.dat.
equinox 13.7f   Catalog equinox of the object coords Because the coordinate system is ICRS, the Equinox keyword is not needed.
etrigger 55s   External trigger ID of ToO event External trigger ID of Target of Opportunity event; e.g. VOevent number, GCN circular, etc.
exptime 14.6f sec Exposure time The actual exposure time. Strictly, the difference between the time when the shutter closes (UTSTOP) and when the shutter opens (UTSTART). Before 2019-04-10, EXPTIME was the requested exposure time for 2m and 1m observations.
filter 55s   Complete filter name Concatenation of FILTER1--3, asterisk '*' separated list of all non air/clear filters.
filter1 55s   The filter type in first filter wheel The filter type in first filter wheel
filter2 55s   The filter type in second filter wheel The filter type in second filter wheel
filter3 55s   The filter type in third filter wheel The filter type in third filter wheel
filteri1 11s   The filter ID in first filter wheel LCOGT filter name of the form 'XXXX-YY-ZZZ' where 'ZZZ' is the filter set number (XXX).
filteri2 11s   The filter ID in second filter wheel LCOGT filter name of the form 'XXXX-YY-ZZZ' where 'ZZZ' is the filter set number (XXX).
filteri3 11s   The filter ID in third filter wheel LCOGT filter name of the form 'XXXX-YY-ZZZ' where 'ZZZ' is the filter set number (XXX).
fitsfile 55s   FITS file used by SExtractor FITS file used by SExtractor
fname 55s   FITS file name FITS file name
focafoff 14.7f mm Autofocus offset in focal plane Autofocus term determined empirically through use of autofocus routines on the telescope sequencer. This value defaults to 0.0 and gets updated by the autofocus routine. Periodically, it will get absorbed into the telescope zero point and zeroed out.
focdmd 14.7f mm Demanded focus position in focal plane Demanded focus position in focal plane
focfloff 14.7f mm Filter focus offset in focal plane The filter-specific focus offset needed to bring that specific filter combination into focus. This is measured relative to 'air' i.e. no filters in the beam.
focinoff 14.7f mm Instrument focus offset Instrument focus offset. This is the offset accounts for instrument to instrument variations such as CCD backfocus, FWS thickness, OxBox height, and corrector power. It is defined to be 0.0 for a master calibration plate behind a reference corrector cell, will vary on the order of 0.5 mm, and is always in FP coordinates.
focoboff 14.7f mm Observer focus offset/defocus in focal plane Observer requested defocus. This value should default to 0.0 in the POND and be passed down.
focposn 14.7f mm Actual focus position in focal plane Actual focus position in focal plane
focstat 12s   Focus state Focus state. One of a MoveableState enum: {INVALID, UNKNOWN, INITIALISING, UNHOMED, HALTED, HOMED, INITIALIZED, MOVING, HOMING, INTERLOCKED, LIMITED, WARNING, FAILED}
foctelzp 14.7f mm Telescope default focus Telescope default focus. This offset accounts for variations such as truss length and M2 thickness. It is set to a value which brings the master calibration plate into focus (FOCINOFF=0.0) or an arbitrary instrument (FOCINOFF<>0.0) into focus with FOCDMD=FOCPOSN=0.0. It is always in physical M2 coordinates. This is the nominal focus setpoint for the telescope upon which other offsets are based. It will generally be defined to bring the primary science instrument into focus, resulting in 0.0 instrument offset for that instrument.
foctemp 14.7f deg C Temp in the focus compensation routine. Temperature used in the focus compensation routine.
foctoff 14.7f mm Thermal correction value for focus The change in focus needed to correct for the change in tube length with temperature.
foczoff 14.7f mm Zenith compression correction focus Zenith compression correction focus
foldport 10s   Fold mirror port The port that the instrument fold mirror is pointed at/illuminating. One of: {CASSEGRAIN, 1, 2, 3, 4, 5, 6, 7, 8} (for 2m telescopes); {CASSEGRAIN, N, S, E, W} (for 0.4m & 1.0m telescopes)
foldposn 55s (mm,deg) Fold mirror position (r, theta) Position of the instrument fold mirror along linear stage (r: in mm) for 0.4m and 2m stages and rotation of fold mirror (theta: degrees measured clockwise from pole from photon's perspective; 2m stage only, 'N/A' for 0.4m stage (which only has 1 axis of movement).
foldstat 10s   Fold mirror state Instrument fold mirror state. One of: {DEPLOYED, STOWED, ERROR, N/A}
framenum 10d   Running frame number The running frame number. The Running frame number resets to 0001 at the start of each night, defined to be at 16:00 local time. Running frame number
frmtotal 10d   Total no. of exposures within molecule Total number of exposures within the observation group (molecule)
fsize 10d B File size for the FITS image File size for the FITS image
fwid 20s   The ID of the filter wheel LCOGT filter wheel name of the form 'fwXXY-ZZ' where XX is the (rounded) size of the filters held (in mm), Y is the filter wheel revision and ZZ is the instance of the particular filter wheel.
gain 10.2f e/ADU Detector gain Detector gain
groupid 55s   Name of the observing group Name of the observing group given by the observer/proposer.
hdrver 55s   Version of the FITS Header keywords Version of the FITS Header keywords
hdu 10d   Header Data Unit Header Data Unit
height 10.2f m Altitude of the telescope The elevation of the telescope above sea level measured in meters to the midpoint of the Declination axis. The position shall be in the WGS84 geodetic system.
icsver 55s   The version number of the ICS The version number of the Instrument Control Software
insstate 8s   The status of the instrument The status of the instrument. One of: {INVALID, OKAY, INIT, STANDBY, WARNING, FAILED, TIMEOUT, SUSPEND, OFF}.
instrume 12s   The name of the instrument used LCOGT Standard instrument name. First letter designates detector manufacturer ('e'=e2v, 'f'=Fairchild, 'k'=Kodak, 't'=Texas Instruments), second letter designates controller manufacturer ('a'=Apogee, 'b'=SBIG, 'l'=LCOGT, 'm'=Merope, 'n'=Andor, 's'= Spectral) followed by a 2 digit running number.
instype 55s   Type of instrument The LCOGT instrument class/type. Should be one of {0m4-SciCam, 0m8-SciCam, 1m0-SciCam-SBIG, 1m0-SciCam-Sinistro, Autoguider, ContextCam, LIHSP-Luca, LIHSP-iXon, 2m0-SciCam-Merope, 2m0-SciCam-Spectral, 2m0-FLOYDS-SciCam, 2m0-FLOYDS-AG, 0m4-LIHSP-Luca, 1m0-LIHSP-iXon, 1m0-LIHSP-FLI}.
isstemp 14.7f deg C Instrument Support Structure temperature Instrument Support Structure (ISS; A&G Box on a 2m, OxBox on 1m) temperature
l1claerr 14.7f mag Error on color-airmass coefficient The error on the color-airmass coefficient reported in L1COLAIR. Set to 0.000 (or -1.0? XXX) if assumed value was used.
l1clasrc 55s   Source of color-airmass coefficient The source of the color-airmass coefficient reported in L1COLAIR and L1CLAERR. Must be one of {FIT_NIGHT, FIT_MULNIGHT, COMPUTED, FIXED, N/A} concatentated with (software name and version). FIT_NIGHT designates it was fitted to data from the same night and telescope as the current image, FIT_MULNIGHT designates it was fitted to data from multiple night (e.g. season average), COMPUTED indicates the value was computed based on measured or assumed wavelength response and assumed SED and FIXED denotes value was fixed at some nominal value. Defaults to 'N/A' if not known, i.e. if L1COLAIR and L1CLAERR are -99.0
l1colair 14.7f mag Color-airmass coefficient The color-airmass coefficient d_i relating the response in filter i to the color of the star C_ik and airmass X_k.
l1colerr 14.7f mag Error on color coefficient The error on the color coefficient reported in L1COLOR. Set to 0.000 (or -1.0? XXX) if assumed value was used.
l1color 14.7f mag Color coefficient The color coefficient b relating the response in filter i to the color of the star C_k.
l1coloru 55s   Color used for calibration The color pair of two filters used for the calibration coefficient b_i relating the response in filter i to the color of the star C_ik. The color used should, in general include the filter that was used.
l1colsrc 55s   Source of color coefficient The source of the color coefficient reported in L1COLOR and L1COLERR. Must be one of {FIT_NIGHT, FIT_MULNIGHT, COMPUTED, FIXED, N/A} concatenated with (software name and version). FIT_NIGHT designates it was fitted to data from the same night and telescope as the current image, FIT_MULNIGHT designates it was fitted to data from multiple night (e.g. season average), COMPUTED indicates the value was computed based on measured or assumed wavelength response and assumed SED and FIXED denotes value was fixed at some nominal value. Defaults to 'N/A' if not known, i.e. if L1COLOR and L1COLERR are -99.0
l1ellip 14.7f   Mean image ellipticity (1-B/A) Mean image ellipticity (1-B/A)
l1ellipa 14.7f deg Position angle of mean image ellipticity Position angle of mean image ellipticity
l1fwhm 14.7f arcsec Frame FWHM Frame FWHM calculated from the SExtractor detections with very small objects and those with FLAGS != 0 weeded out. (e.g., a clipped and filtered average over all suitable sources in the frame.)
l1idbias 55s   Filename of bias frame used Filename of bias frame used
l1iddark 55s   Filename of dark frame used Filename of dark frame used
l1idflat 55s   Filename of flatfield frame used Filename of flatfield frame used
l1idfrng 55s   Filename of fringe frame used Filename of fringe frame used
l1idmask 55s   Filename of mask file used Filename of mask file used
l1idshut 55s   Filename of shutter correction frame Filename of shutter correction frame
l1mean 20.11f ADU Mean of frame background Mean of frame background
l1median 20.11f ADU Median of frame background Median of frame background
l1photom 14.7f mag/airmass Estimated extinction Estimated extinction
l1phterr 14.7f   Error on Estimated Extinction The error on the atmospheric extinction reported in L1PHOTOM. Set to 0.000 (or -1.0? XXX) if assumed value was used.
l1phtsrc 55s   Source of Estimated Extinction The source of the atmospheric extinction coefficient reported in L1PHOTOM and L1PHTERR. Must be one of FIT_NIGHT|FIT_MULNIGHT|COMPUTED|FIXED|N/A (+software name and version+). FIT_NIGHT designates it was fitted to data from the same night and telescope as the current image, FIT_MULNIGHT designates it was fitted to data from multiple night (e.g. season average), COMPUTED indicates the value was computed based on measured or assumed wavelength response and assumed SED and FIXED denotes value was fixed at some nominal value. Defaults to N/A if not known, i.e. if L1PHOTOM and L1PHTERR are -99.0.
l1phtver 55s   Version of Phot. Calib module The version number of the module performing photometric calibration on the data.
l1pubdat yyyy-mm-dd hh:mi:ss UTC Date the frame becomes public The UTC date the frame becomes public. In the case of 'private' data this is normally 1 year after the time the frame was taken. In the case of 'public' data, it is equal to the DATEOBS.
l1pubprv 12s   Public or private data? Public or private data?
l1qcatst 10d   Catalog production status (bitmask;-1=Unknown,0=OK) A signed integer bitmask for all parameters which affect the catalog generation process and quality. The bitmask is comprised of:
  • -1: Unknown/unassessed
  • 0: OK
  • 1: WCS_PROBLEM (Problem with astrometric solution, nominal WCS used)
  • 2: EXTRACT_PROBLEM (Problem with source extraction)
  • 4: CATPOST_PROBLEM (Problem with catalog post-processing (normally timecorrect.py)
  • 8: TIMESMODIFIED (timecorrect code adjusted the DATE-OBS/MJD-OBS)
l1qcver 55s   Version of QC module Version of QC module
l1qimgst 10d   Image taking status (bitmask;-1=Unknown,0=OK) A signed integer bitmask for all parameters which affect an entire frame, including weather conditions, enclosure, telescope and instrument physical status. The bitmask is comprised of:
  • -1: Unknown/unassessed
  • 0: WMS_CLEAR (indicates clear conditions)
  • 2: WMS_UNKNOWN (indicates unknown conditions)
  • 4: WMS_CLOUDY (indicates cloudy conditions)
  • 8: ENC_UNKNOWN (enclosure state unknown)
  • 16: ENC_DOME_OCCULT (Dome occulting the beam)
  • 32: BAD_AXIS (An axis in error state e.g. rotator renders this data unusable)
  • 64: BAD_FOCUS (bad focus renders this data unusable)
  • 128: BEAM_SHUTTER_OCCULT (Shutter occulted the beam)
  • 256: BEAM_HARTMANN_OCCULT (Hartmann screen occulted the beam)
  • 512: BEAM_DARKSLIDE_OCCULT (Darkslide occulted the beam)
  • 1024: BEAM_M1COVER_OCCULT (Primary (M1) cover occulted the beam)
  • 2048: INS_BAD_READOUT (Readout problem renders this data untrustworthy)
  • 4096: INS_NOISY_CCD (Noisy CCD renders this data untrustworthy)
  • 8192: INS_DEAD_CCD (CCD error renders this data untrustworthy)
l1qnight 10d   Photom. calib. night quality (-1=Unknown,0=GOOD) A signed integer value giving the photometric calibration code's assessment of the quality if the night and data. The possible values are:
  • -1: Unknown/unassessed (Default)
  • 0: GOOD
  • 1-X: TBD
l1qobcon 12s   Observing constraints satisfied? String concatenation of one of {T(rue), F(alse), U(nassessed)} for each of the observer-specified observing constraints in order that they appear in the header:
  1. Lunar phase constraint satisfied? (constraint keyword: BLKMNPH)
  2. Lunar distance satisfied? (constraint keyword: BLKMNDST)
  3. Seeing satisfied? (constraint keyword: BLKSEECO)
  4. Transparency satisfied (constraint keyword: BLKTRNCO)
  5. Airmass satisfied (constraint keyword: BLKAIRCO)
'UNKNOWN' should be reported if the observing constraints aren't present in the header (or are UNKNOWN).
l1qphtst 10d   Photometric calibration status (bitmask;-1=Unknown,0=OK) A signed integer bitmask for all parameters which affect the photometric calibration process and quality. The bitmask is comprised of:
  • -1: Unknown/unassessed
  • 0: OK
  • 1: BKGD_STRUCTURE (Background structure)
  • 2: BKGD_GRADIENT (Gradient in sky background)
  • 4: BKGD_HIGH (Sky background higher than expected)
  • 8: EXTINCT_MEDIUM (Extinction higher than expected by medium amount)
  • 16: EXTINCT_LARGE (Extinction higher than expected by large amount)
  • 32: DELTAZP_MEDIUM (Difference in ZP higher than expected by medium amount)
  • 64: DELTAZP_LARGE (Difference in ZP higher than expected by large amount)
  • 128: EXTINCT_NOMINAL (Nominal extinction used, not measured)
  • 256: ZP_NOMINAL (Nominal ZP used, not measured)
  • 512: PHOTCALIB_FAILED (Photometric calibration failed)
  • 1024: FWHM_TOOSMALL (FWHM smaller than expected)
  • 2048: FWHM_TOOLARGE (FWHM larger than expected)
l1refair 14.7f   Reference airmass value The reference standard airmass value X_0 used. This should correspond to the average mean airmass of objects observed during regular observing. 1.3 is the fixed SDSS standard.
l1refcat 55s   Reference photometric catalog used The photometric reference catalog that was used to provide the standard magnitudes.
l1refcol 14.7f mag Reference color value The reference "cosmic color" value C_0i used. It is proposed that SDSS values will be used.
l1sigma 20.11f ADU Standard dev of frame background Standard dev of frame background
l1skybrt 14.7f mag/arcsec^2 Estimated sky brightness Estimated sky brightness
l1statbi 10d   Status flag for bias frame correction The flag is 0 if the bias frame correction was not performed, 1 if it was performed and -1 if the operation is not applicable.
l1statda 10d   Status flag for dark frame correction The flag is 0 if the dark frame correction was not performed, 1 if it was performed and -1 if the operation is not applicable.
l1statfl 10d   Status flag for flatfield correction The flag is 0 if the flatfield correction was not performed, 1 if it was performed and -1 if the operation is not applicable.
l1statfr 10d   Status flag for fringe correction The flag is 0 if the fringe correction was not performed, 1 if it was performed and -1 if the operation is not applicable.
l1statov 10d   Status flag for overscan correction The flag is 0 if the overscan correction was not performed, 1 if it was performed and -1 if the operation is not applicable.
l1stattr 10d   Status flag for overscan trimming The flag is 0 if the overscan trimming was not performed, 1 if it was performed and -1 if the operation is not applicable.
l1zp 14.7f mag Instrumental zeropoint Instrumental zeropoint
l1zperr 14.7f mag Error on Instrumental zeropoint Error on Instrumental zeropoint
l1zpsrc 55s   Source of Instrumental zeropoint The source of the Instrumental zeropoint reported in L1ZP and L1ZPERR. Defaults to 'N/A' if not known, i.e. if L1ZP & L1ZPERR are -99.0.
lapsrate 14.7f   Assumed value written by timecorrect.py Assumed value written by timecorrect.py
latitude 13.7f deg N Latitude of the telescope Geodetic latitude of the telescope in decimal degrees with North +ve. The position shall be in the WGS84 geodetic system.
longitud 13.7f deg E Longitude of the telescope Geodetic longitude of the telescope in decimal degrees with East +ve. The position shall be in the WGS84 geodetic system.
lst 11s HH:MM:SS.ss Local Sideral Time at observation start Local Sideral Time at observation start
m1cover 8s   Primary mirror (M1) cover state Primary mirror (M1) cover state. One of MirrorCoverState enum: {DEPLOYED, STOWED, ERROR, UNKNOWN, (N/A)}
m1hrtmn 8s   Primary mirror (M1) Hartmann screen state Primary mirror (M1) Hartmann screen state. One of MirrorCoverState enum: {DEPLOYED, STOWED, ERROR, UNKNOWN, (N/A)}
m1temp 14.7f deg C Primary mirror temperature Primary mirror temperature
m2pitch 14.7f arcsec Secondary mirror (M2) vertex tilt in pitch Amount of collimation in the secondary mirror (M2) tilt about vertex in pitch direction.
m2roll 14.7f arcsec Secondary mirror (M2) vertex tilt in roll Amount of collimation in the secondary mirror (M2) tilt about vertex in roll direction.
maxlin 10.1f ADU Detector non-linearity level Detector non-linearity level
mjd_obs 19.8f UTC days Modified Julian Date of obs. start This will be an exact conversion of the DATE-OBS value expressed as a Modified Julian Date (MJD: JD - 2,400,000.5). Five decimals are required for an accuracy of one second and 8 decimals for one millisecond.
molfrnum 10d   Exposure no. within the molecule Exposure number within the observation group (molecule)
molnum 10d   Number of the molecule The current Molecule (a homogeneous set of exposures within an observation block which have the same configuration (exposure time, target pointing, defocus and filter)) number.
moltype 55s   Type of observation group (molecule) Type of observation group (molecule)
moluid 55s   The molecule unique id from POND. The molecule unique id assigned by the POND.
moonalt 14.7f deg Lunar altitude Lunar altitude above horizon
moondist 14.7f deg Lunar distance from target Lunar distance from target
moonfrac 14.7f   Fraction of the moon illuminated Fraction of the moon illuminated. Ranges from 0.0 (New Moon) to 1.0 (Full Moon).
moonstat 8s   Moon position at observation start Moon position at the start of the observation [UP, DOWN]
naxis1 10d   Number of array columns Number of array columns
naxis2 10d   Number of array rows Number of array rows
object 55s   Object name Object name as provided by the observer.
obrecipe 55s   Observing recipe required/used Observing recipe required/used
obsgeo_x 15.4f m Cartesian X Coord of the telescope The position of the telescope along the line defined by the intersection of the meridian and the equatorial planes. The Earth's center of mass is the origin.
obsgeo_y 15.4f m Cartesian Y coord of the telescope The position of the telescope along the line 90 degrees East of the X-axis and its intersection with the equator. The Earth's center of mass is the origin.
obsgeo_z 15.4f m Cartesian Z coord of the telescope The position of the telescope along the line from the Earth's center of mass (the origin) and the North Pole.
obsid 55s   Observation ID Name of the observation (fixed set of filter, pointing, exposure time and defocus) given by the observer/proposer.
obsnote 55s   User specified observation note User specified observation note
obstelem 55s   Link to the observation telemetry file Link to the observation telemetry file
obstype 16s   Type of observation The type of observation taken which must be one of {EXPOSE,STANDARD, LAMBERT-DARK,LAMBERT-FLAT,BIAS,DARK,SKY-FLAT,LAMP-FLAT,ARC,SPECTRUM}
ofst_dec 12s sDD:MM:SS.ss Catalog Dec plus pointing offsets Catalog Declination plus pointing offsets
ofst_ra 12s HH:MM:SS.ss Catalog RA plus pointing offsets Catalog Right Ascension plus pointing offsets
origin 55s   Organization responsible for the data Organization responsible for the data
origname 55s   File name written by ICS The original file name written by the Instrument Control System (ICS).
parallax 10.6f arcsec Parallax of the object Parallax of the object. These values should default to 0.0 in the POND and be passed down.
pcrecipe 55s   Processing recipes required/used Processing recipes required/used
pipever 55s   Pipeline version The pipeline version string. This is likely to be a combination of a version number (allowing change tracking) and a SVN revision number allowing traceback to a specific version of the codebase.
pixscale 10.3f arcsec/pixel Nominal pixel scale on the sky Nominal pixel scale on the sky
plephem 55s   Source of planetary ephemerides Source of planetary ephemerides
pm_dec 10.5f arcsec/year Proper motion in Dec of the object Proper motion in Dec of the object. These values should default to 0.0 in the POND and be passed down.
pm_ra 10.5f sec/year Proper motion in RA of the object Proper motion in RA of the object. These values should default to 0.0 in the POND and be passed down.
polarmox 10.4f arcsec Polar motion X The polar motion X co-ordinate in arcsecs. This is usually from the TCS which obtains it from downloading the IERS Bulletin A (http://maia.usno.navy.mil/ser7/ser7.dat).
polarmoy 10.4f   Polar motion Y The polar motion Y co-ordinate in arcsecs. This is usually from the TCS which obtains it from downloading the IERS Bulletin A (http://maia.usno.navy.mil/ser7/ser7.dat).
pprecipe 55s   Post-processing recipes required/used Post-processing recipes required/used
propid 25s   Proposal ID The LCOGT proposal id conforming to the LCOGT Proposal code scheme of {TAG designator}{Semester}-{Proposal No.}.
qv1_0 14.7f   Projection parameter Distortion function for x: a_0=0
qv1_1 14.7f   Projection parameter Distortion function for x: a_1 x = 1
qv1_17 14.7f   Projection parameter Distortion function for x: a_17 x^5 = 3q^2
qv1_21 14.7f   Projection parameter Distortion function for x: a_21 xy^4 = 3q^2
qv1_31 14.7f   Projection parameter Distortion function for x: a_31 x^7 = -12q^3
qv1_37 14.7f   Projection parameter Distortion function for x: a_37 xy^6 = -12q^3
qv1_7 14.7f   Projection parameter Distortion function for x: a_7 x^3 = -q
qv1_9 14.7f   Projection parameter Distortion function for x: a_9 xy^2 = -q
qv2_0 14.7f   Projection parameter Distortion function for y: b_0=0
qv2_1 14.7f   Projection parameter Distortion function for y: b_1 y = 1
qv2_17 14.7f   Projection parameter Distortion function for y: b_17 y^5 = 3q^2
qv2_21 14.7f   Projection parameter Distortion function for y: b_21 yx^4 = 3q^2
qv2_31 14.7f   Projection parameter Distortion function for y: b_31 y^7 = -12q^3
qv2_37 14.7f   Projection parameter Distortion function for y: b_37 yx^6 = -12q^3
qv2_7 14.7f   Projection parameter Distortion function for y: b_7 y^3 = -q
qv2_9 14.7f   Projection parameter Distortion function for y: b_9 yx^2 = -q
ra 14.7f   Right Ascension at array center Right Ascension at array center
radesys 8s   Fundamental coord. system of the object The co-ordinate system of the object. Only ICRS co-ordinate systems may be used. FK5 positions will be treated as sufficiently close to ICRS to be interchangeable.
radvel 10.4f km/s Radial velocity of the object Radial velocity of the object. These values should default to 0.0 in the POND and be passed down.
ratel 12s HH:MM:SS.sss RA where telescope is pointing Zero-padded sexagesimal mean RA of where telescope is pointing.
ratrack 10.4f arcsec/s Non-sidereal tracking in RA Non-sidereal tracking in RA. These values should default to 0.0 in the POND and be passed down.
rdnoise 10.2f e/pixel Detector read noise Detector read noise
rdspeed 10.1f kpix/sec Detector readout speed Detector readout speed
refhumid 14.7f % Humidity used in refraction calculation Humidity used in refraction calculation
refpres 14.7f mbar Pressure in refraction calculation Pressure in refraction calculation
reftemp 14.7f deg C Temperature in refraction calculation Temperature in refraction calculation
reqnum 55s   Unique identifier to track a sub-Request Unique identifier to track a sub-Request
reqtime 14.6f sec Requested exposure time The requested exposure time. Prior to 2019-04-10, this keyword was used only for observations with the 0.4m SBIG cameras.
roi 55s binned pixel Region of Interest or MULTIPLE ROI is the actual region of the detector you are using, if there are multiple then FITS has multiple extensions and the primary header would read 'MULTIPLE" and each extension header would have an appropriate ROI.
rollerdr 10.4f rad Driven roller encoder angle The encoder angle from the driven rollers' encoder on the roll (H.A.) axis (measured in radians).
rollernd 10.4f rad Non-driven roller encoder angle The encoder angle from the non-driven rollers' encoder on the roll (H.A.) axis (measured in radians).
rotangle 14.7f deg Rotator axis position The actual position of the selected image rotator. Must be set to 'N/A' for telescopes without a selected image rotator.
rotdmd 14.7f deg Rotator axis demand The demanded position of the selected image rotator. Must be set to 'N/A' for telescopes without a selected image rotator.
rotmode 55s   Rotator mode The selected image rotator mode. Must be set to one of {SKY, MOUNT, VFLOAT, VERTICAL, FLOAT, N/A}. The modes are:
  • SKY: The parameter gives position angle on the sky (measured anticlockwise from north which is 0 degrees). If rotator tracking is enabled (as it is at start-up) the rotator will follow this PA as the telescope moves.
  • MOUNT: The parameter gives mount position angle in degrees. ROTATOR MOUNT stops the turntable at the requested position angle.
  • FLOAT: Floating mode, so that on source change the sky PA is set to that computed from the current mount PA so ensuring minimum rotator slewing. This mode is used if sky PA is unimportant but rotator tracking is required.
  • VERTICAL: Move the rotator to so that the slit is vertical and stops it. It is intended to minimise loss of light due to differential refraction during spectroscopic observing. (XXX Following true?) Note that autoguiding is not possible, since off-axis images move in the focal plane.
  • VFLOAT: Puts the rotator into vertical floating mode, so that on source change the sky PA is set to that computed which gives a vertical slit the rotator then track that sky PA. This mode is used if sky PA tracking is required but minimises effects from atmospheric dispersion. This is generally more useful than the VERTICAL option, since autoguiding is possible.
  • N/A: Must be set to 'N/A' for telescopes without a selected image rotator.
rotskypa 14.7f deg Rotator position angle The position angle of the selected image rotator. Must be set to 'N/A' for telescopes without a selected image rotator.
rotstat 55s   Rotator axis state One of a SystemState enum: {INVALID, OKAY, INIT, STANDBY, WARNING, FAILED, TIMEOUT, SUSPEND, OFF}
rottype 55s   Selected image derotator The selected image derotator. Must be set to one of {CASSEGRAIN, NASMYTH_LEFT, NASMYTH_RIGHT, COUDE_LEFT, COUDE_RIGHT, GREGORIAN, PRIME, NONE, OTHER}. Must be set to 'NONE' for telescopes without an image derotator or where one is not currently selected.
saturate 10.1f ADU Detector saturation level Detector saturation level
schednam 55s   Name of scheduler in control The name of the scheduling entity that is in control. This will normally be the Network (Adaptive) Scheduler. In the case that the Network (Adaptive) Scheduler is not running, then this should be 'POND'. If an Observing Script is in control, then SCHEDNAM should contain the name of the Observing Script.
schedsee 10.4f arcsec Estimated seeing when group scheduled The Site Agent's estimate of the seeing that was used by the scheduler for the basis of selecting the current group.
schedtrn 10.4f   Estimated transparency when group sched Estimated transparency when group sched
secpix 14.7f arcsec/pixel Fitted pixel scale on sky Fitted pixel scale on sky
sexaped1 10.2f pixel Aperture Diameter 1 Aperture Diameter 1
sexaped2 10.2f pixel Aperture Diameter 2 Aperture Diameter 2
sexaped3 10.2f pixel Aperture Diameter 3 Aperture Diameter 3
sexaped4 10.2f pixel Aperture Diameter 4 Aperture Diameter 4
sexapek1 14.7f   Kron parameter Kron parameter
sexapek2 14.7f   Kron analysis radius Kron analysis radius
sexapek3 14.7f   Kron minimum radius Kron minimum radius
sexbkdev 17.9e ADU RMS in median background RMS in median background
sexbkgfx 10d   Background filter width Background filter width
sexbkgfy 10d   Background filter height Background filter height
sexbkgnd 17.9e ADU Median background Median background
sexbkgsx 10d pixel Background mesh width Background mesh width
sexbkgsy 10d pixel Background mesh height Background mesh height
sexbkthd 17.9e ADU Extraction threshold Extraction threshold
sexcln 8s   Cleaning flag Cleaning flag
sexclnpa 14.7f   Cleaning parameter Cleaning parameter
sexclnst 10d   Cleaning object stack Cleaning object stack
sexconff 10s   Configuration filename Configuration filename
sexconv 8s   Convolution flag Convolution flag
sexconvf 55s   Convolution filename Convolution filename
sexconvn 8s   Convolution normalization flag Convolution normalization flag
sexdbldc 14.7f   Contrast parameter Contrast parameter
sexdbldn 10d   Number of sub-thresholds Number of sub-thresholds
sexdett 8s   Detection type Detection type
sexfbufs 10d lines Frame buffer size Frame buffer size
sexgain 17.9e e/ADU Gain Gain
seximabp 14.7f bits/pixel FITS image BITPIX FITS image BITPIX
seximasx 10d pixel Image width Image width
seximasy 10d pixel Image height Image height
sexisapr 14.7f   ISO-APER ratio ISO-APER ratio
sexmggam 14.7f   Magnitude gamma Magnitude gamma
sexmgzpt 14.7f mag Magnitude zero point Magnitude zero point
sexminar 10d pixel Extraction minimum area Extraction minimum area
sexndet 10d   Number of detections Number of detections
sexnfin 10d   Number of final extracted objects Number of final extracted objects
sexnnwf 55s   Classification NNW filename Classification NNW filename
sexnpara 10d   Number of parameters per object Number of parameters per object
sexpbkgs 10d pixel Local area thickness Local area thickness
sexpbkgt 8s   Photometry background type Photometry background type [LOCAL, GLOBAL]
sexpixs 17.9e arcsec/pixel Pixel scale Pixel scale
sexpixsk 10d pixel Pixel stacksize Pixel stacksize
sexsatlv 17.9e ADU Saturation level Saturation level
sexsfwhm 17.9e arcsec Seeing FWHM Seeing FWHM
sexstrsy 10d lines Strip height Strip height
sexthld 17.9e   Threshold Threshold
sexthldt 55s   Threshold type Threshold type
site 70s   Name of the observatory site Name of the observatory site
siteid 10s   ID code of the observatory site ID code of the observatory site specified by the three letter code from the nearest airport. One of {ogg,coj,bpl,lsc,sqa,cpt,elp,tfn}.
skymag 14.7f mag/arcsec^2 Computed (expected) sky brightness Computed (expected) sky brightness
srctype 55s   Source Type Source Type One of {EXTRASOLAR, MAJORPLANET, MINORPLANET, COMET, MOON}
sunalt 14.7f deg Solar altitude Solar altitude
sundist 14.7f deg Solar Distance from Target Solar Distance from Target
tagid 11s   Telescope Allocation Group ID The Time Allocation Group that the proposal belongs. Current permitted values are LCO/FTN_RCS/FTS_RCS/CALIB/UKRTOC/FTUKRES/ HAWRTOC/HAWOL/LCOARI/FTS_ANU/MACUED.
tcorcomp 55s   Time corrections performed Time corrections performed
tcorepos 55s   Source of Earth positions Source of Earth positions
tcorsyst 55s   Reference frame time system for TCORR Reference frame time system for TCORR
tcorvern 55s   Time correction code version Time correction code version
tcsstate 8s   Telescope Control System (TCS) state Telescope Control System (TCS) state. One of a SystemState enum: {INVALID, OKAY, INIT, STANDBY, WARNING, FAILED, TIMEOUT, SUSPEND, OFF}
tcsver 55s   Version of the TCS software Version of the Telescope Control System software
telescop 55s   Name of the telescope Name of the telescope
telid 55s   ID code of the telescope ID code of the telescope
telmode 13s   Telescope mode The mode that the telescope is operating in. For normal operations with observations flowing from the POND & Scheduler, this will be 'AUTOMATIC'. If the Sequencer has been disabled locally so that POND observations are ignored, then this will be 'MANUAL'. If an Observing Script is in control, then this will be 'OBSSCRIPT'.
telstate 8s   Telescope status The overall telescope state. One of a SystemState enum: {INVALID, OKAY, INIT, STANDBY, WARNING, FAILED, TIMEOUT, SUSPEND, OFF}.
timesys 55s   Time system used for all dates The time system/scale used. It sets the principal time system for time-related keywords and data in the HDU (i.e., it does not preclude the addition of keywords or data columns that provide information for transformations to other time scales, such as sidereal times or barycenter corrections). Each HDU shall contain not more than one TIMESYS keyword. By default, times will be deemed to be as measured at the detector (or at the observatory) for time scales defined on the geoid (i.e., TAI, UTC and TT).
tpntmodl 55s   Version of the pointing model Version number/release date of the pointing model, usually from TPOINT.
tpt_dec 12s sDD:MM:SS.ss Telescope demand Dec Telescope demand Dec
tpt_ra 12s HH:MM:SS.ss Telescope demand RA Telescope demand RA
tracknum 55s   Unique identifier to track a UserRequest Unique identifier to track a UserRequest
trimsec 55s binned pixel Section of CCD containing useful data Section of the recorded image to be kept after calibration processing. This is generally the part of the data section containing useful data. The section is in in binned pixels if binning is done.
tubetemp 14.7f deg C Temperature of the telescope tube Temperature of the telescope tube
userid 55s   User login ID The LCOGT userid of the proposal Principal Investigator (PI) for (normal) robotic operations or the userid of the observer for planetarium and manual observing.
ut1_utc 10.4f sec UT1-UTC The (UT1-UTC) value in seconds, usually from the TCS which obtains it from downloading the IERS Bulletin A (http://maia.usno.navy.mil/ser7/ser7.dat).
utstart 16s UTC The start time of the observation The UTC time of the instant of shutter opening of the observation. This is expected to be produced by the instrument from a tight synch to a GPS clock, probably via a Pulse-Per-Second (PPS) output.
utstop 16s UTC The stop time of the observation The UTC time of the instant of shutter closure of the observation. This is expected to be produced by the instrument from a tight synch to a GPS clock, probably via a Pulse-Per-Second (PPS) output.
wavelen 14.7f   Wavelength assumed by timecorrect.py Wavelength assumed by timecorrect.py
wccattyp 55s   Reference catalog used Reference catalog used
wcnterms 10d   Number of terms used in WCS fit Number of terms used in WCS fit
wcsdelde 22.13f arcsec Shift of fitted WCS with respect to nominal Dec Shift of fitted WCS with respect to nominal Dec
wcsdelra 22.13f arcsec Shift of fitted WCS with respect to nominal RA Shift of fitted WCS with respect to nominal RA
wcserr 10d   Error status of WCS fit. 0 for no error Error status of WCS fit. 0 for no error
wcsimcat 55s   Detection catalog file name File name of the catalog with the sources detected on the image.
wcsmatch 10d   Number of stars in image matched against reference catalog Number of stars in image matched against reference catalog
wcsnref 10d   Number stars in image available to define WCS Number stars in image available to define WCS
wcsrdres 55s arcsec WCS fitting residuals (x/y) WCS fitting residuals (x/y)
wcsrfcat 55s   Astrometric catalog file name File name for the astrometric catalog used in the WCS solution
wcssolvr 55s   Solver for the World Coordinate System Solver for the World Coordinate System
winddir 14.7f deg E of N Wind direction Wind direction
windspee 14.7f km/h Wind speed Wind speed
wmscloud 14.7f deg C Boltwood sky temperature Boltwood sky temperature
wmsdewpt 14.7f deg C Dewpoint Dewpoint
wmshumid 14.7f % Humidity Current percentage humidity
wmsmoist 14.7f mV Moisture level Moisture level
wmspres 14.7f mbar Atmospheric pressure Atmospheric pressure
wmsrain 8s   Rain alert Rain alert. One of {CLEAR, SET}
wmsskybr 14.7f mag/arcsec^2 Measured SEMS sky brightness The measured sky brightness in mags/arcsec^2 from the Sky Quality Meter.
wmsstate 12s   WMS system state WMS system state. One of a SystemState enum: {INVALID, OKAY, INIT, STANDBY, WARNING, FAILED, TIMEOUT, SUSPEND, OFF}
wmstemp 14.7f deg C External temperature External temperature