========== desi-EXPID ========== :Summary: Raw data from the DESI spectrographs, with one fpack-compressed HDU per spectrograph camera, plus additional telemetry data. :Naming Convention: ``desi-EXPID.fits.fz``, where EXPID is the zero-padded 8-digit exposure ID. :Regex: ``desi-[0-9]{8}\.fits\.fz`` :File Type: FITS, 500 MB Contents ======== There is one HDU per spectrograph camera with EXTNAMEs like B0, B1, ... R0, R1, ... Z8, Z9. The structure of each of these is the same; only one is explicitly documented below. These could appear in any order and individual cameras could be missing from a data file depending upon the state of the hardware and the ICS configuration. ================= ========= ================ ==================================== Number EXTNAME Type Contents ================= ========= ================ ==================================== HDU00_ IMAGE Empty HDU HDU01_ SPEC Compressed IMAGE Global header keywords HDU02_ Z0 Compressed IMAGE Raw data from the Z0 spectrograph `HDU03 -- HDU31`_ various Compressed IMAGE Raw data similar to Z0 spectrograph. HDU32_ SPECTCONS BINTABLE Telemetry data ================= ========= ================ ==================================== FITS Header Units ================= HDU00 ----- This HDU has no non-standard required keywords. Empty HDU. Early commissioning data and simulated data may have had ``EXTNAME = SPS`` as well as header keywords that now appear in HDU01_. HDU01 ----- EXTNAME = SPEC This HDU should be treated as the primary HDU. In particular, this HDU contains header keywords that should be treated as belonging to the entire file. The data contents are a dummy payload that should not be used. The dummy value is typically ``[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]`` in compressed format. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ============= ===================================================================== ======= =============================================== KEY Example Value Type Comment ============= ===================================================================== ======= =============================================== NAXIS1 8 int width of table in bytes NAXIS2 1 int number of rows in table BZERO 32768 int offset data range to that of unsigned short BSCALE 1 int default scaling factor MODULE CI str Image Sources/Component EXPID 118526 int Exposure number EXPFRAME 0 int Frame number FRAMES None Unknown Number of Frames in Archive COSMSPLT T bool Cosmics split exposure if true MAXSPLIT 0 int Number of allowed exposure splits VISITIDS [1]_ 118524,118525,118526 str List of expids for a visit (same tile) TILEID [1]_ 4403 int DESI Tile ID FIBASSGN [1]_ /data/tiles/SVN_tiles/004/fiberassign-004403.fits.gz str Fiber assign FLAVOR science str Observation type OBSTYPE SCIENCE str Spectrograph observation type SEQUENCE _Split str OCS Sequence name MANIFEST F bool DOS exposure manifest OBJECT str Object name PURPOSE Main Survey str Purpose of observing night PROGRAM DARK str Program name NTSSURVY main str NTS survey name NTSPROG [1]_ DARK str NTS program name SBPROF [1]_ ELG str Profile used by ETC MAXTIME [1]_ 5400.0 float [s] Maximum exposure time for entire visit (fro ESTTIME [1]_ 3705.79 float [s] Estimated exposure time for visit (from ETC MINTIME [1]_ 300.0 float [s] Minimum exposure time (from NTS, used by ET MIDTIME [1]_ 915.0 float [s] Exposure midpoint time used by PlateMaker PROPID 2020B-5000 str Proposal ID OBSERVER Jessica Chellino, Corentin Ravoux str Names of observers LEAD Martin Landriau str Lead observer INSTRUME DESI str Instrument name OBSERVAT KPNO str Observatory name OBS-LAT 31.96403 str [deg] Observatory latitude OBS-LONG -111.59989 str [deg] Observatory east longitude OBS-ELEV 2097.0 float [m] Observatory elevation TELESCOP KPNO 4.0-m telescope str Telescope name CORRCTOR DESI Corrector str Corrector Identification SEQID 5 requests str Exposure sequence identifier SEQNUM 1 int Number of exposure in sequence SEQTOT 5 int Total number of exposures in sequence NIGHT 20220113 int Observing night SEQSTART 2022-01-14T11:03:08.447408 str Start time of sequence processing TIMESYS UTC str Time system used for date-obs DATE-OBS 2022-01-14T11:04:17.830044160 str [UTC] Observation data and start tim TIME-OBS 2022-01-14T11:04:17.830044160 str [UTC] Observation start time MJD-OBS 59593.461317476 float Modified Julian Date of observation STARTADJ [1]_ 2022-01-14T11:03:22.140652 str Time sequence starts adjusting the inst OPENSHUT 2022-01-14T11:04:18.577390 str Time shutter opened CAMSHUT open str Shutter status during observation ST 11:13:28.582000 str Local Sidereal time at observation start (HH:MM EXPTIME 579.1588 float [s] Actual exposure time DELTARA 0. float [arcsec] Offset], right ascension, observer inp DELTADEC 0. float [arcsec] Offset], declination, observer input ACQTIME [1]_ 15.0 float [s] acqusition image exposure time GUIDTIME [1]_ 5.0 float [s] guider GFA exposure time FOCSTIME [1]_ 60.0 float [s] focus GFA exposure time SKYTIME [1]_ 60.0 float [s] sky camera exposure time (acquisition) REQRA [1]_ 170.239 float [deg] Requested right ascension (observer input REQDEC [1]_ -7.093 float [deg] Requested declination (observer input) WHITESPT F bool Telescope is at whitespot ZENITH F bool Telescope is at zenith SEANNEX F bool Telescope is at SE annex BEYONDP F bool Telescope is beyond pole FIDUCIAL off str Fiducials status during observation BACKLIT [1]_ off str Fibers are backlit if True AIRMASS 1.287912 float Airmass FOCUS 946.6,-231.6,-83.4,-18.3,9.8,139.4 str Telescope focus settings VCCD [1]_ ON str True (ON) if CCD voltage is on TRUSTEMP [1]_ 12.267 float [deg] Average Telescope truss temperature (only PMIRTEMP [1]_ 11.675 float [deg] Average primary mirror temperature (nit,e PMREADY T bool Primary mirror ready PMCOVER [1]_ open str Primary mirror cover PMCOOL [1]_ off str Primary mirror cooling DOMSHUTU [1]_ open str Upper dome shutter DOMSHUTL [1]_ open str Lower dome shutter DOMLIGHH [1]_ off str High dome lights DOMLIGHL [1]_ off str Low dome lights DOMEAZ 180.062 float [deg] Dome azimuth angle DOMINPOS T bool Dome is in position EPOCH 2000.0 float Epoch of observation GUIDOFFR -0.659376 float [arcsec] Cummulative guider offset (RA) GUIDOFFD 0.003783 float [arcsec] Cummulative guider offset (dec) SUNRA 296.151203 float [deg] Sun RA at start of exposure SUNDEC -21.264137 float [deg] Sun declination at start of exposure MOONDEC 23.960888 float [deg] Moon declination at start of exposure MOONRA 73.944051 float [deg] Moon RA at start of exposure MOONSEP 99.032 float [deg] Moon Separation MOUNTAZ 176.725567 float [deg] Mount azimuth angle MOUNTDEC -7.102329 float [deg] Mount declination MOUNTEL 50.883914 float [deg] Mount elevation angle MOUNTHA -2.081118 float [deg] Mount hour angle INCTRL T bool DESI in control INPOS T bool Mount in position MNTOFFD 75.86 float [arcsec] Mount offset (dec) MNTOFFR -31.1 float [arcsec] Mount offset (RA) PARALLAC -2.510103 float [deg] Parallactic angle SKYDEC -7.102329 float [deg] Telescope declination (pointing on sky) SKYRA 170.24163 float [deg] Telescope right ascension (pointing on sk TARGTDEC -7.102329 float [deg] Target declination (to TCS) TARGTRA 170.24163 float [deg] Target right ascension (to TCS) TARGTAZ 177.063681 float [deg] Target azimuth TARGTEL 50.893802 float [deg] Target elevation TRGTOFFD 0.0 float [arcsec] Telescope target offset (dec) TRGTOFFR 0.0 float [arcsec] Telescope target offset (RA) ZD 39.106198 float [deg] Telescope zenith distance TILERA [1]_ 170.239 float RA of tile given in fiberassign file TILEDEC [1]_ -7.093 float DEC of tile given in fiberassign file TCSST 11:13:30.164 str Local Sidereal time reported by TCS (HH:MM:SS) TCSMJD 59593.461771 float MJD reported by TCS USETURB [1]_ T bool Turbulence corrections are applied if true USEETC [1]_ T bool ETC data available if true REQTEFF [1]_ 1000.0 float [s] Requested effective exposure time ACTTEFF [1]_ 1.113899 float [s] Actual effective exposure time TOTTEFF [1]_ 936.3194 float [s] Total effective exposure time for visit SEEING None Unknown [arcsec] ETC/PM seeing TRANSPAR None Unknown ETC/PM transparency SKYLEVEL [1]_ 7.516 float [unit?] PM/ETC sky level PMSEEING None Unknown [arcsec] PlateMaker GFAPROC seeing PMTRANSP None Unknown [%] PlateMaker GFAPROC transparency ETCSEENG [1]_ 1.1695 float [arcsec] ETC seeing ETCTEFF [1]_ 1.113899 float [s] ETC effective exposure time ETCREAL [1]_ 580.104492 float [s] ETC real open shutter time ETCPREV [1]_ 454.940948 float [s] ETC cummulative t_eff for visit ETCSPLIT [1]_ 3 int ETC split sequence number for this visit ETCPROF [1]_ ELG str ETC source brightness profile ETCTRANS [1]_ 0.10543 float ETC avg. TRANSP normalized to 1 ETCTHRUP [1]_ 0.10793 float ETC avg. thruput (PSF profile) ETCTHRUE [1]_ 0.10457 float ETC avg. thruput (ELG profile) ETCTHRUB [1]_ 0.101061 float ETC avg. thruput (BGS profile) ETCFRACP [1]_ 0.575305 float ETC transp. weighted avg. FFRAC (PSF) ETCFRACE [1]_ 0.408837 float ETC transp. weighted avg. FFRAC (ELG) ETCFRACB [1]_ 0.181983 float ETC transp. weighted avg. FFRAC (BGS) ETCSKY [1]_ 6.882767 float ETC averaged, normalized sky camera flux ACQFWHM [1]_ 1.169528 float [arcsec] FWHM of guide star PSF in acq. image ACQCAM [1]_ GUIDE0,GUIDE2,GUIDE3,GUIDE5,GUIDE7,GUIDE8 str Acquisition cameras used GUIDECAM [1]_ GUIDE0,GUIDE2,GUIDE3,GUIDE5,GUIDE7,GUIDE8 str Guide cameras used for t FOCUSCAM [1]_ FOCUS1,FOCUS4,FOCUS6,FOCUS9 str Focus cameras used for this exposure SKYCAM [1]_ SKYCAM0,SKYCAM1 str Sky cameras used for this exposure REQADC [1]_ 334.05,26.06 str [deg] requested ADC angles ADCCORR T bool Correct pointing for ADC setting if True ADC1PHI 334.049995 float [deg] ADC 1 angle ADC2PHI 26.058728 float [deg] ADC 2 angle ADC1HOME F bool ADC 1 at home position if True ADC2HOME F bool ADC 2 at home position if True ADC1NREV -1.0 float ADC 1 number of revs ADC2NREV 1.0 float ADC 2 number of revs ADC1STAT STOPPED str ADC 1 status ADC2STAT STOPPED str ADC 2 status USESKY [1]_ T bool DOS Control: use Sky Monitor USEFOCUS [1]_ T bool DOS Control: use focus HEXPOS 946.7,-231.6,-83.4,-18.3,9.9,138.8 str Hexapod position HEXTRIM 0.0,0.0,0.0,0.0,0.0,0.0 str Hexapod trim values USEROTAT [1]_ T bool DOS Control: use rotator ROTOFFST 138.8 float [arcsec] Rotator offset ROTENBLD T bool Rotator enabled ROTRATE 0.513 float [arcsec/min] Rotator rate RESETROT F bool DOS Control: reset hex rotator SPLITEXP [1]_ T bool Split exposure part of a visit USESPLIT [1]_ T bool Exposure splits are allowed USEPOS [1]_ T bool Fiber positioner data available if true PETALS [1]_ PETAL0,PETAL1,PETAL2,PETAL3,PETAL4,PETAL5,PETAL6,PETAL7,PETAL8,PETAL9 str Participating petals POSCYCLE [1]_ None Unknown Number of current iteration POSONTGT [1]_ None Unknown Number of positioners on target POSONFRC [1]_ None Unknown Fraction of positioners on target POSDISAB [1]_ None Unknown Number of disabled positioners POSENABL [1]_ None Unknown Number of enabled positioners POSRMS [1]_ None Unknown [mm] RMS of positioner accuracy POSITER [1]_ 1 int Positioning Control: max. number of pos. cycles POSFRACT [1]_ 0.95 float POSTOLER [1]_ 0.005 float Positioning Control: in_position tolerance (mm) POSMVALL [1]_ T bool Positioning Control: move all positioners USEGUIDR [1]_ T bool DOS Control: use guider GUIDMODE catalog str Guider mode USEAOS [1]_ T bool DOS Control: AOS data available if true USEDONUT [1]_ T bool DOS Control: use donuts USESPCTR [1]_ T bool DOS Control: use spectrographs SPCGRPHS SP0,SP1,SP2,SP3,SP4,SP5,SP6,SP7,SP8,SP9 str Participating spectrograph ILLSPECS SP0,SP1,SP2,SP3,SP4,SP5,SP6,SP7,SP8,SP9 str Participating illuminate s CCDSPECS SP0,SP1,SP2,SP3,SP4,SP5,SP6,SP7,SP8,SP9 str Participating ccd spectrog TDEWPNT [1]_ -32.86 float Telescope air dew point TAIRFLOW [1]_ 0.0 float Telescope air flow TAIRITMP [1]_ 12.5 float [deg] Telescope air in temperature TAIROTMP [1]_ 12.7 float [deg] Telescope air out temperature TAIRTEMP [1]_ 11.05 float [deg] Telescope air temperature TCASITMP [1]_ 6.6 float [deg] Telescope Cass Cage in temperature TCASOTMP [1]_ 12.2 float [deg] Telescope Cass Cage out temperature TCSITEMP [1]_ 12.1 float [deg] Telescope center section in temperature TCSOTEMP [1]_ 12.3 float [deg] Telescope center section out temperature TCIBTEMP [1]_ 0.0 float [deg] Telescope chimney IB temperature TCIMTEMP [1]_ 0.0 float [deg] Telescope chimney IM temperature TCITTEMP [1]_ 0.0 float [deg] Telescope chimney IT temperature TCOSTEMP [1]_ 0.0 float [deg] Telescope chimney OS temperature TCOWTEMP [1]_ 0.0 float [deg] Telescope chimney OW temperature TDBTEMP [1]_ 12.4 float [deg] Telescope dec bore temperature TFLOWIN [1]_ 0.0 float Telescope flow rate in TFLOWOUT [1]_ 0.0 float Telescope flow rate out TGLYCOLI [1]_ 12.8 float [deg] Telescope glycol in temperature TGLYCOLO [1]_ 12.6 float [deg] Telescope glycol out temperature THINGES [1]_ 12.1 float [deg] Telescope hinge S temperature THINGEW [1]_ 22.3 float [deg] Telescope hinge W temperature TPMAVERT [1]_ 11.658 float [deg] Telescope mirror averagetemperature TPMDESIT [1]_ 6.0 float [deg] Telescope mirror desired temperature TPMEIBT [1]_ 12.1 float [deg] Telescope mirror EIB temperature TPMEITT [1]_ 11.5 float [deg] Telescope mirror EIT temperature TPMEOBT [1]_ 12.3 float [deg] Telescope mirror EOB temperature TPMEOTT [1]_ 12.0 float [deg] Telescope mirror EOT temperature TPMNIBT [1]_ 11.9 float [deg] Telescope mirror NIB temperature TPMNITT [1]_ 11.4 float [deg] Telescope mirror NIT temperature TPMNOBT [1]_ 12.3 float [deg] Telescope mirror NOB temperature TPMNOTT [1]_ 12.0 float [deg] Telescope mirror NOT temperature TPMRTDT [1]_ 11.67 float [deg] Telescope mirror RTD temperature TPMSIBT [1]_ 12.1 float [deg] Telescope mirror SIB temperature TPMSITT [1]_ 11.5 float [deg] Telescope mirror SIT temperature TPMSOBT [1]_ 12.0 float [deg] Telescope mirror SOB temperature TPMSOTT [1]_ 11.7 float [deg] Telescope mirror SOT temperature TPMSTAT [1]_ ready str Telescope mirror status TPMWIBT [1]_ 11.9 float [deg] Telescope mirror WIB temperature TPMWITT [1]_ 11.3 float [deg] Telescope mirror WIT temperature TPMWOBT [1]_ 11.9 float [deg] Telescope mirror WOB temperature TPMWOTT [1]_ 11.8 float [deg] Telescope mirror WOT temperature TPCITEMP [1]_ 12.1 float [deg] Telescope primary cell in temperature TPCOTEMP [1]_ 12.0 float [deg] Telescope primary cell out temperature TPR1HUM [1]_ 0.0 float Telescope probe 1 humidity TPR1TEMP [1]_ 0.0 float [deg] Telescope probe1 temperature TPR2HUM [1]_ 0.0 float Telescope probe 2 humidity TPR2TEMP [1]_ 0.0 float [deg] Telescope probe2 temperature TSERVO [1]_ 40.0 float Telescope servo setpoint TTRSTEMP [1]_ 11.9 float [deg] Telescope top ring S temperature TTRWTEMP [1]_ 11.7 float [deg] Telescope top ring W temperature TTRUETBT [1]_ -1.5 float [deg] Telescope truss ETB temperature TTRUETTT [1]_ 11.6 float [deg] Telescope truss ETT temperature TTRUNTBT [1]_ 11.7 float [deg] Telescope truss NTB temperature TTRUNTTT [1]_ 11.6 float [deg] Telescope truss NTT temperature TTRUSTBT [1]_ 11.7 float [deg] Telescope truss STB temperature TTRUSTST [1]_ 10.8 float [deg] Telescope truss STS temperature TTRUSTTT [1]_ 11.7 float [deg] Telescope truss STT temperature TTRUTSBT [1]_ 12.2 float [deg] Telescope truss TSB temperature TTRUTSMT [1]_ 12.2 float [deg] Telescope truss TSM temperature TTRUTSTT [1]_ 12.2 float [deg] Telescope truss TST temperature TTRUWTBT [1]_ 11.6 float [deg] Telescope truss WTB temperature TTRUWTTT [1]_ 11.6 float [deg] Telescope truss WTT temperature ALARM [1]_ F bool UPS major alarm or check battery ALARM-ON [1]_ F bool UPS active alarm condition BATTERY [1]_ 100.0 float [%] UPS Battery left SECLEFT [1]_ 6312.0 float [s] UPS Seconds left UPSSTAT System Normal - On Line(7) str UPS Status INAMPS [1]_ 68.3 float [A] UPS total input current OUTWATTS [1]_ 4800.0,7200.0,4500.0 str [W] UPS Phase A, B, C output watts COMPDEW [1]_ -10.3 float [deg C] Computer room dewpoint COMPHUM [1]_ 13.9 float [%] Computer room humidity COMPAMB [1]_ 25.2 float [deg C] Computer room ambient temperature COMPTEMP [1]_ 17.6 float [deg C] Computer room hygrometer temperature DEWPOINT [1]_ -36.9 float [deg C] (outside) dewpoint HUMIDITY [1]_ 2.0 float [%] (outside) humidity PRESSURE [1]_ 793.2 float [torr] (outside) air pressure OUTTEMP [1]_ 11.0 float [deg C] outside temperature WINDDIR [1]_ 264.5 float [deg] wind direction WINDSPD [1]_ 11.7 float [m/s] wind speed GUST [1]_ 10.8 float [m/s] Wind gusts speed AMNIENTN [1]_ 16.8 float [deg C] ambient temperature north CFLOOR [1]_ 11.6 float [deg C] temperature on C floor NWALLIN [1]_ 17.3 float [deg C] temperature at north wall inside NWALLOUT [1]_ 11.1 float [deg C] temperature at north wall outside WWALLIN [1]_ 16.5 float [deg C] temperature at west wall inside WWALLOUT [1]_ 11.5 float [deg C] temperature at west wall outside AMBIENTS [1]_ 17.6 float [deg C] ambient temperature south FLOOR [1]_ 15.7 float [deg C] temperature at floor (LCR) EWALLCMP [1]_ 11.9 float [deg C] temperature at east wall, computer room EWALLCOU [1]_ 11.6 float [deg C] temperature at east wall, Coude room ROOF [1]_ 10.9 float [deg C] temperature on roof ROOFAMB [1]_ 11.1 float [deg C] ambient temperature on roof DOMEBLOW [1]_ 11.2 float [deg C] temperature at dome back, lower DOMEBUP [1]_ 11.3 float [deg C] temperature at dome back, upper DOMELLOW [1]_ 11.1 float [deg C] temperature at dome left, lower DOMELUP [1]_ 10.9 float [deg C] temperature at dome left, upper DOMERLOW [1]_ 11.1 float [deg C] temperature at dome right, lower DOMERUP [1]_ 10.7 float [deg C] temperature at dome right, upper PLATFORM [1]_ 10.6 float [deg C] temperature at platform SHACKC [1]_ 16.7 float [deg C] temperature at shack ceiling SHACKW [1]_ 16.6 float [deg C] temperature at shack wall STAIRSL [1]_ 10.9 float [deg C] temperature at stairs, lower STAIRSM [1]_ 10.7 float [deg C] temperature at stairs, mid STAIRSU [1]_ 10.9 float [deg C] temperature at stairs, upper TELBASE [1]_ 11.6 float [deg C] temperature at telescope base UTILWALL [1]_ 11.4 float [deg C] temperature at utility room wall UTILROOM [1]_ 10.1 float [deg C] temperature in utilitiy room SP0NIRT [1]_ 139.96 float [K] SP0 NIR temperature SP0REDT [1]_ 139.99 float [K] SP0 red temperature SP0BLUT [1]_ 163.02 float [K] SP0 blue temperature SP0NIRP [1]_ 7.36e-08 float [mb] SP0 NIR pressure SP0REDP [1]_ 5.492e-08 float [mb] SP0 red pressure SP0BLUP [1]_ 1.001e-07 float [mb] SP0 blue pressure SP1NIRT [1]_ 139.96 float [K] SP1 NIR temperature SP1REDT [1]_ 139.96 float [K] SP1 red temperature SP1BLUT [1]_ 163.02 float [K] SP1 blue temperature SP1NIRP [1]_ 6.622e-08 float [mb] SP1 NIR pressure SP1REDP [1]_ 6.033e-08 float [mb] SP1 red pressure SP1BLUP [1]_ 8.599e-08 float [mb] SP1 blue pressure SP2NIRT [1]_ 139.96 float [K] SP2 NIR temperature SP2REDT [1]_ 139.96 float [K] SP2 red temperature SP2BLUT [1]_ 163.02 float [K] SP2 blue temperature SP2NIRP [1]_ 5.556e-08 float [mb] SP2 NIR pressure SP2REDP [1]_ 6.013e-08 float [mb] SP2 red pressure SP2BLUP [1]_ 8.897e-08 float [mb] SP2 blue pressure SP3NIRT [1]_ 140.03 float [K] SP3 NIR temperature SP3REDT [1]_ 139.96 float [K] SP3 red temperature SP3BLUT [1]_ 163.04 float [K] SP3 blue temperature SP3NIRP [1]_ 4.3e-08 float [mb] SP3 NIR pressure SP3REDP [1]_ 7.066e-08 float [mb] SP3 red pressure SP3BLUP [1]_ 8.324e-08 float [mb] SP3 blue pressure SP4NIRT [1]_ 139.96 float [K] SP4 NIR temperature SP4REDT [1]_ 139.99 float [K] SP4 red temperature SP4BLUT [1]_ 163.04 float [K] SP4 blue temperature SP4NIRP [1]_ 6.921e-08 float [mb] SP4 NIR pressure SP4REDP [1]_ 4.505e-08 float [mb] SP4 red pressure SP4BLUP [1]_ 6.846e-08 float [mb] SP4 blue pressure SP5NIRT [1]_ 139.99 float [K] SP5 NIR temperature SP5REDT [1]_ 139.99 float [K] SP5 red temperature SP5BLUT [1]_ 163.02 float [K] SP5 blue temperature SP5NIRP [1]_ 7.886e-08 float [mb] SP5 NIR pressure SP5REDP [1]_ 4.383e-08 float [mb] SP5 red pressure SP5BLUP [1]_ 1.003e-07 float [mb] SP5 blue pressure SP6NIRT [1]_ 139.96 float [K] SP6 NIR temperature SP6REDT [1]_ 139.96 float [K] SP6 red temperature SP6BLUT [1]_ 163.04 float [K] SP6 blue temperature SP6NIRP [1]_ 2.688e-07 float [mb] SP6 NIR pressure SP6REDP [1]_ 6.65e-08 float [mb] SP6 red pressure SP6BLUP [1]_ 9.062e-08 float [mb] SP6 blue pressure SP7NIRT [1]_ 139.96 float [K] SP7 NIR temperature SP7REDT [1]_ 140.03 float [K] SP7 red temperature SP7BLUT [1]_ 162.97 float [K] SP7 blue temperature SP7NIRP [1]_ 6.073e-08 float [mb] SP7 NIR pressure SP7REDP [1]_ 4.807e-08 float [mb] SP7 red pressure SP7BLUP [1]_ 1.066e-07 float [mb] SP7 blue pressure SP8NIRT [1]_ 139.96 float [K] SP8 NIR temperature SP8REDT [1]_ 139.96 float [K] SP8 red temperature SP8BLUT [1]_ 163.04 float [K] SP8 blue temperature SP8NIRP [1]_ 1.257e-07 float [mb] SP8 NIR pressure SP8REDP [1]_ 4.635e-08 float [mb] SP8 red pressure SP8BLUP [1]_ 8.912e-08 float [mb] SP8 blue pressure SP9NIRT [1]_ 139.96 float [K] SP9 NIR temperature SP9REDT [1]_ 139.96 float [K] SP9 red temperature SP9BLUT [1]_ 163.02 float [K] SP9 blue temperature SP9NIRP [1]_ 5.325e-08 float [mb] SP9 NIR pressure SP9REDP [1]_ 6.124e-08 float [mb] SP9 red pressure SP9BLUP [1]_ 1.236e-07 float [mb] SP9 blue pressure RADESYS FK5 str Coordinate reference frame of major/minor axes SIMGFAP [1]_ F bool DOS Control: simulate GFAPROC USEFVC [1]_ T bool DOS Control: use fvc USEFID [1]_ T bool DOS Control: use fiducials USEILLUM [1]_ T bool DOS Control: use illuminator USEXSRVR [1]_ T bool DOS Control: use exposure server USEOPENL [1]_ T bool DOS Control: use open loop move USEMIDPT [1]_ T bool Use exposure midpoint if true STOPGUDR [1]_ T bool DOS Control: stop guider STOPFOCS [1]_ T bool DOS Control: stop focus STOPSKY [1]_ T bool DOS Control: stop sky monitor KEEPGUDR [1]_ F bool DOS Control: keep guider running KEEPFOCS [1]_ F bool DOS Control: keep focus running KEEPSKY [1]_ F bool DOS Control: keep sky mon. running REACQUIR [1]_ F bool DOS Control: reacquire same files FILENAME /exposures/desi/20220113/00118526/desi-00118526.fits.fz str Name of (F EXCLUDED str Components excluded from this exposure DOSVER trunk str DOS software version OCSVER 1.2 float OCS software version PMVER [1]_ desi-138368 str PlateMaker/Dervish version ETCVERS [1]_ 0.1.14 str ETC version CONSTVER DESI:CURRENT str Constants version INIFILE /data/msdos/dos_home/architectures/kpno/desi.ini str DOS Configuration REQTIME 1860.0 float [s] Requested exposure time SIMGFACQ [1]_ F bool TCSKRA 0.01 0.04 0.01 str TCS Kalman (RA) TCSKDEC 0.01 0.04 0.01 str TCS Kalman (dec) TCSGRA 0.15 float TCS simple gain (RA) TCSGDEC 0.15 float TCS simple gain (dec) TCSMFRA 2 int TCS moving filter length (RA) TCSMFDEC 2 int TCS moving filter length (dec) TCSPIRA 0.9,0.0,0.0,0.0 str TCS PI settings (P, I (gain, error window, satu TCSPIDEC 0.9,0.0,0.0,0.0 str TCS PI settings (P, I (gain, error window, satu GUIEXPID [1]_ 118526 int Guider exposure id at start of spectro exp. IGFRMNUM [1]_ 2 int Guider frame number at start of spectro exp. FOCEXPID [1]_ 118526 int Focus exposure id at start of spectro exp. IFFRMNUM [1]_ 0 int Focus frame number at start of spectro exp. SKYEXPID [1]_ 118526 int Sky exposure id at start of spectro exp. ISFRMNUM [1]_ 0 int Sky frame number at start of spectro exp. FGFRMNUM [1]_ 72 int Guider frame number at end of spectro exp. FFFRMNUM [1]_ 9 int Focus frame number at end of spectro exp. FSFRMNUM [1]_ 7 int Sky frame number at end of spectro exp. ETCSKYLV [1]_ 7.8081 float [unit?] ETC skylevel CHECKSUM OlYZPlXZOlXZOlXZ str HDU checksum updated 2022-01-14T11:15:03 DATASUM 306780459 str data unit checksum updated 2022-01-14T11:15:03 ============= ===================================================================== ======= =============================================== .. [1] Optional Data: FITS image [int16 (compressed), 10] HDU02 ----- EXTNAME = Z0 Unprocessed spectrograph raw data, including overscans, from camera Z0. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ============= ==================================================== ======= =============================================== KEY Example Value Type Comment ============= ==================================================== ======= =============================================== NAXIS1 8 int width of table in bytes NAXIS2 4194 int number of rows in table BZERO 32768 int offset data range to that of unsigned short BSCALE 1 int default scaling factor EXPID 118526 int Exposure number EXPFRAME 0 int Frame number FRAMES [1]_ None Unknown Number of Frames in Archive TILEID [1]_ 4403 int DESI Tile ID FIBASSGN [1]_ /data/tiles/SVN_tiles/004/fiberassign-004403.fits.gz str Fiber assign FLAVOR science str Observation type SEQUENCE _Split str OCS Sequence name PURPOSE Main Survey str Purpose of observing night PROGRAM DARK str Program name PROPID 2020B-5000 str Proposal ID OBSERVER Jessica Chellino, Corentin Ravoux str Names of observers LEAD Martin Landriau str Lead observer INSTRUME DESI str Instrument name OBSERVAT KPNO str Observatory name OBS-LAT 31.96403 str [deg] Observatory latitude OBS-LONG -111.59989 str [deg] Observatory east longitude OBS-ELEV 2097.0 float [m] Observatory elevation TELESCOP KPNO 4.0-m telescope str Telescope name CORRCTOR DESI Corrector str Corrector Identification NIGHT 20220113 int Observing night TIMESYS UTC str Time system used for date-obs DATE-OBS 2022-01-14T11:04:17.790636032 str [UTC] Observation data and start tim TIME-OBS 2022-01-14T11:04:17.790636032 str [UTC] Observation start time MJD-OBS 59593.46131702 float Modified Julian Date of observation OPENSHUT 2022-01-14T11:04:18.577390 str Time shutter opened ST 11:13:28.540000 str Local Sidereal time at observation start (HH:MM EXPTIME 579.193 float [s] Actual exposure time DELTARA 0. float [arcsec] Offset], right ascension, observer inp DELTADEC 0. float [arcsec] Offset], declination, observer input REQRA [1]_ 170.239 float [deg] Requested right ascension (observer input REQDEC [1]_ -7.093 float [deg] Requested declination (observer input) FOCUS [1]_ 946.6,-231.6,-83.4,-18.3,9.8,139.4 str Telescope focus settings VCCD ON str True (ON) if CCD voltage is on VCCDON 2022-01-10T20:55:43.758808 str Time when CCD voltage was turned on VCCDSEC 310751.8 float [s] CCD on time in seconds TRUSTEMP [1]_ 12.267 float [deg] Average Telescope truss temperature (only PMIRTEMP [1]_ 11.675 float [deg] Average primary mirror temperature (nit,e EPOCH 2000.0 float Epoch of observation MOUNTAZ [1]_ 176.725567 float [deg] Mount azimuth angle MOUNTDEC [1]_ -7.102329 float [deg] Mount declination MOUNTEL [1]_ 50.883914 float [deg] Mount elevation angle MOUNTHA [1]_ -2.081118 float [deg] Mount hour angle SKYDEC [1]_ -7.102329 float [deg] Telescope declination (pointing on sky) SKYRA [1]_ 170.24163 float [deg] Telescope right ascension (pointing on sk TARGTDEC [1]_ -7.102329 float [deg] Target declination (to TCS) TARGTRA [1]_ 170.24163 float [deg] Target right ascension (to TCS) USEETC [1]_ T bool ETC data available if true USESKY [1]_ T bool DOS Control: use Sky Monitor USEFOCUS [1]_ T bool DOS Control: use focus HEXTRIM [1]_ 0.0,0.0,0.0,0.0,0.0,0.0 str Hexapod trim values USEROTAT [1]_ T bool DOS Control: use rotator ROTOFFST [1]_ 138.8 float [arcsec] Rotator offset ROTENBLD [1]_ T bool Rotator enabled ROTRATE [1]_ 0.513 float [arcsec/min] Rotator rate USEGUIDR [1]_ T bool DOS Control: use guider USEDONUT [1]_ T bool DOS Control: use donuts SPECGRPH 0 int Spectrograph logical name (SP) SPECID 4 int Spectrograph serial number (SM) FEEBOX lbnl082 str CCD Controller serial number VESSEL 17 int Cryostat serial number FEEVER v20160312 str CCD Controller version DETFLVER FAILED: invalid argument for get command str CCD Controller detector f FEEPOWER ON str FEE power status FEEDMASK 2134851391 int FEE dac mask FEECMASK 1048575 int FEE clk mask CCDTEMP -137.5647 float [deg C] CCD controller CCD temperature RADESYS FK5 str Coordinate reference frame of major/minor axes DOSVER trunk str DOS software version OCSVER 1.2 float OCS software version CONSTVER DESI:CURRENT str Constants version INIFILE /data/msdos/dos_home/architectures/kpno/desi.ini str DOS Configuration CAMERA z0 str Camera name DAC2 -9.0002,-8.8271 str [V] set value, measured value DATASECA [8:2064, 2:2065] str Data section for quadrant A CLOCK6 9.9999,0.0 str [V] high rail, low rail DIGITIME 56.4524 float [s] Time to digitize image DAC17 20.0008,11.834 str [V] set value, measured value CLOCK15 9.9992,2.9993 str [V] high rail, low rail DETSECB [2058:4114, 1:2064] str Detector section for quadrant B CLOCK0 9.9999,0.0 str [V] high rail, low rail CRYOPRES 7.360e-08 str [mb] Cryostat pressure (IP) AMPSECC [1:2057, 4128:2065] str AMP section for quadrant C CCDTMING flatdark_lbnl_timing.txt str CCD timing file CLOCK8 9.9992,2.9993 str [V] high rail, low rail CLOCK4 9.9999,0.0 str [V] high rail, low rail PRESECB [4250:4256, 2:2065] str Prescan section for quadrant B DAC1 -9.0002,-8.8683 str [V] set value, measured value PRRSECC [8:2064, 4194:4194] str Row prescan section for quadrant C DAC10 -25.0003,-24.7976 str [V] set value, measured value OFFSET2 0.4000000059604645,-8.8271 str [V] set value, measured value CLOCK14 9.9992,2.9993 str [V] high rail, low rail DAC16 39.9961,39.039 str [V] set value, measured value ORSECB [2193:4249, 2066:2097] str Row overscan section for quadrant B AMPSECA [1:2057, 1:2064] str AMP section for quadrant A DAC14 0.0,0.1039 str [V] set value, measured value DAC11 -25.0003,-24.0556 str [V] set value, measured value CLOCK7 -2.0001,3.9999 str [V] high rail, low rail PGAGAIN 3 int Controller gain ORSECA [8:2064, 2066:2097] str Row overscan section for quadrant A DAC15 0.0,0.089 str [V] set value, measured value DETSECD [2058:4114, 2065:4128] str Detector section for quadrant D ORSECD [2193:4249, 2098:2129] str Row bias section for quadrant D OFFSET0 0.4000000059604645,-8.7962 str [V] set value, measured value OFFSET6 2.0,6.0911 str [V] set value, measured value PRRSECD [2193:4249, 4194:4194] str Row prescan section for quadrant D DAC13 0.0,0.1187 str [V] set value, measured value OFFSET3 0.4000000059604645,-8.8786 str [V] set value, measured value AMPSECD [4114:2058, 4128:2065] str AMP section for quadrant D DAC9 -25.0003,-24.946 str [V] set value, measured value DELAYS 20, 20, 25, 40, 7, 3000, 7, 7, 400, 7 str [10] Delay settings SETTINGS detectors_sm_20210128.json str Name of DESI CCD settings file DETSECA [1:2057, 1:2064] str Detector section for quadrant A CLOCK5 9.9999,0.0 str [V] high rail, low rail PRRSECB [2193:4249, 1:1] str Row prescan section for quadrant B DETECTOR M1-53 str Detector (ccd) identification CLOCK12 9.9992,2.9993 str [V] high rail, low rail DAC12 0.0,0.1039 str [V] set value, measured value TRIMSECA [8:2064, 2:2065] str Trim section for quadrant A DATASECB [2193:4249, 2:2065] str Data section for quadrant B CDSPARMS 400, 400, 8, 2000 str CDS parameters TRIMSECC [8:2064, 2130:4193] str Trim section for quadrant C DAC3 -9.0002,-8.8683 str [V] set value, measured value BIASSECA [2065:2128, 2:2065] str Bias section for quadrant A TRIMSECB [2193:4249, 2:2065] str Trim section for quadrant B CASETEMP 60.1833 float [deg C] CCD controller case temperature CPUTEMP 59.5781 float [deg C] CCD controller CPU temperature OFFSET5 2.0,6.0806 str [V] set value, measured value CCDSECD [2058:4114, 2065:4128] str CCD section for quadrant D CCDNAME CCDSM4Z str CCD name DAC4 5.9998,6.0648 str [V] set value, measured value BLDTIME 0.3529 float [s] Time to build image CLOCK13 9.9992,2.9993 str [V] high rail, low rail CLOCK1 9.9999,0.0 str [V] high rail, low rail PRESECA [1:7, 2:2065] str Prescan section for quadrant A CCDSIZE 4194,4256 str CCD size in pixels (rows, columns) DATASECC [8:2064, 2130:4193] str Data section for quadrant C CLOCK18 9.0,0.9999 str [V] high rail, low rail CLOCK10 9.9992,2.9993 str [V] high rail, low rail CRYOTEMP 139.962 float [deg K] Cryostat CCD temperature CLOCK3 -2.0001,3.9999 str [V] high rail, low rail DAC0 -9.0002,-8.7962 str [V] set value, measured value CCDSECA [1:2057, 1:2064] str CCD section for quadrant A CLOCK11 9.9992,2.9993 str [V] high rail, low rail CLOCK2 9.9999,0.0 str [V] high rail, low rail CLOCK9 9.9992,2.9993 str [V] high rail, low rail CLOCK17 9.0,0.9999 str [V] high rail, low rail ORSECC [8:2064, 2098:2129] str Row overscan section for quadrant C CCDSECC [1:2057, 2065:4128] str CCD section for quadrant C PRESECD [4250:4256, 2130:4193] str Prescan section for quadrant D BIASSECD [2129:2192, 2130:4193] str Bias section for quadrant D AMPSECB [4114:2058, 1:2064] str AMP section for quadrant B CCDCFG default_lbnl_20210128.cfg str CCD configuration file BIASSECB [2129:2192, 2:2065] str Bias section for quadrant B BIASSECC [2065:2128, 2130:4193] str Bias section for quadrant C CLOCK16 9.9999,3.0 str [V] high rail, low rail CCDPREP purge,clear str CCD prep actions DAC8 -25.0003,-24.8273 str [V] set value, measured value PRRSECA [8:2064, 1:1] str Row prescan section for quadrant A DATASECD [2193:4249, 2130:4193] str Data section for quadrant D DAC5 5.9998,6.0806 str [V] set value, measured value PRESECC [1:7, 2130:4193] str Prescan section for quadrant C OFFSET1 0.4000000059604645,-8.8786 str [V] set value, measured value OFFSET4 2.0,6.0595 str [V] set value, measured value DAC7 5.9998,5.9964 str [V] set value, measured value DAC6 5.9998,6.0963 str [V] set value, measured value OFFSET7 2.0,5.9911 str [V] set value, measured value DETSECC [1:2057, 2065:4128] str Detector section for quadrant C TRIMSECD [2193:4249, 2130:4193] str Trim section for quadrant D CCDSECB [2058:4114, 1:2064] str CCD section for quadrant B REQTIME 1860.0 float [s] Requested exposure time OBSID kp4m20220114t110417 str Unique observation identifier PROCTYPE RAW str Data processing level PRODTYPE image str Data product type CHECKSUM mqJSonIQmnIQmnIQ str HDU checksum updated 2022-01-14T11:15:05 DATASUM 3453799606 str data unit checksum updated 2022-01-14T11:15:05 ============= ==================================================== ======= =============================================== Data: FITS image [int16 (compressed), 4256x4194] HDU03 -- HDU31 -------------- EXTNAME = B0, R0, B1, R1, Z1, B2, R2, Z2, B3, R3, Z3, B4, R4, Z4, B5, R5, Z5, B6, R6, Z6, B7, R7, Z7, B8, R8, Z8, B9, R9, Z9 Data: See Z0. Note: any combination of B0..Z9 could exist in any order. HDU32 ----- EXTNAME = SPECTCONS This is a telemetry table. This table contains variable-length arrays, whose length depends on the exact number of HDUs included in this file. Note: this is the last HDU, but its exact number will depend upon the number of cameras in included in the file. The ``smid`` column is not present for exposures before expid 172920. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ============= ============================================================================================================ ======= =============================================== KEY Example Value Type Comment ============= ============================================================================================================ ======= =============================================== NAXIS1 352 int width of table in bytes NAXIS2 10 int number of rows in table EXPID 118526 int Exposure number EXPFRAME 0 int Frame number FRAMES [1]_ None Unknown Number of Frames in Archive TILEID [1]_ 4403 int DESI Tile ID FIBASSGN [1]_ /data/tiles/SVN_tiles/004/fiberassign-004403.fits.gz str Fiber assign FLAVOR science str Observation type SEQUENCE _Split str OCS Sequence name PURPOSE Main Survey str Purpose of observing night PROGRAM DARK str Program name PROPID 2020B-5000 str Proposal ID OBSERVER Jessica Chellino, Corentin Ravoux str Names of observers LEAD Martin Landriau str Lead observer INSTRUME DESI str Instrument name OBSERVAT KPNO str Observatory name OBS-LAT 31.96403 str [deg] Observatory latitude OBS-LONG -111.59989 str [deg] Observatory east longitude OBS-ELEV 2097.0 float [m] Observatory elevation TELESCOP KPNO 4.0-m telescope str Telescope name CORRCTOR DESI Corrector str Corrector Identification NIGHT 20220113 int Observing night TIMESYS UTC str Time system used for date-obs DELTARA 0. float [arcsec] Offset], right ascension, observer inp DELTADEC 0. float [arcsec] Offset], declination, observer input REQRA [1]_ 170.239 float [deg] Requested right ascension (observer input REQDEC [1]_ -7.093 float [deg] Requested declination (observer input) FOCUS [1]_ 946.6,-231.6,-83.4,-18.3,9.8,139.4 str Telescope focus settings TRUSTEMP [1]_ 12.267 float [deg] Average Telescope truss temperature (only PMIRTEMP [1]_ 11.675 float [deg] Average primary mirror temperature (nit,e EPOCH 2000.0 float Epoch of observation MOUNTAZ [1]_ 176.725567 float [deg] Mount azimuth angle MOUNTDEC [1]_ -7.102329 float [deg] Mount declination MOUNTEL [1]_ 50.883914 float [deg] Mount elevation angle MOUNTHA [1]_ -2.081118 float [deg] Mount hour angle SKYDEC [1]_ -7.102329 float [deg] Telescope declination (pointing on sky) SKYRA [1]_ 170.24163 float [deg] Telescope right ascension (pointing on sk TARGTDEC [1]_ -7.102329 float [deg] Target declination (to TCS) TARGTRA [1]_ 170.24163 float [deg] Target right ascension (to TCS) USEETC [1]_ T bool ETC data available if true USESKY [1]_ T bool DOS Control: use Sky Monitor USEFOCUS [1]_ T bool DOS Control: use focus HEXTRIM [1]_ 0.0,0.0,0.0,0.0,0.0,0.0 str Hexapod trim values USEROTAT [1]_ T bool DOS Control: use rotator ROTOFFST [1]_ 138.8 float [arcsec] Rotator offset ROTENBLD [1]_ T bool Rotator enabled ROTRATE [1]_ 0.513 float [arcsec/min] Rotator rate USEGUIDR [1]_ T bool DOS Control: use guider USEDONUT [1]_ T bool DOS Control: use donuts SPCGRPHS SP4, SP9, SP8, SP2, SP0, SP5, SP7, SP6, SP1, SP3 str Participating spe DEVICES SPECTCON4, SPECTCON9, SPECTCON8, SPECTCON2, SPECTCON0, SPECTCON5, SPECTCON7, SPECTCON6, SPECTCON1, SPECTCON3 str Participating devices (spectro controller) RADESYS FK5 str Coordinate reference frame of major/minor axes DOSVER trunk str DOS software version OCSVER 1.2 float OCS software version CONSTVER DESI:CURRENT str Constants version INIFILE /data/msdos/dos_home/architectures/kpno/desi.ini str DOS Configuration REQTIME 1860.0 float [s] Requested exposure time OBSID kp4m20220114t110417 str Unique observation identifier PROCTYPE RAW str Data processing level PRODTYPE image str Data product type CHECKSUM 0YhA1VZ30VfA0VZ3 str HDU checksum updated 2022-01-14T11:15:09 DATASUM 2915472531 str data unit checksum updated 2022-01-14T11:15:09 ============= ============================================================================================================ ======= =============================================== Required Data Table Columns ~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. rst-class:: columns ============= =========== ===== =============================================================== Name Type Units Description ============= =========== ===== =============================================================== unit int64 spectrograph ID (SP notation) specid int64 spectrograph ID (SP notation) smid [1]_ int64 spectrograph hardware ID (SM notation) EXPTIME [1]_ float64 s exposure time for this spectrograph DATE-OBS char stream timestamp (date and time of observation for this spectrograph) TIME-OBS char stream timestamp (time of observation for this spectrograph) MJD-OBS float64 d MJD time of observation for this spectrograph ST char stream timestamp (local sidereal time for this spectrograph) OPENSHUT [1]_ char stream timestamp (shutter open time for this spectrograph) CLOSSHUT [1]_ float64 s time to close shutter for this spectrograph OBSID char stream unique identifier for this exposure STATUS char stream Overall spectro-controller status HARTL char stream Status of left Hartmann door (open, closed, error) HARTLP char stream Left Hartmann door power (on, off, error) HARTR char stream Status of right Hartmann door (open, closed, error) HARTRP char stream Right Hartmann door power (on, off, error) WAGO char stream Status of WAGO PLC (ready, error) NIRSHUT char stream Status of NIR shutter (open, closed, error) NIRSEAL char stream NIR shutter seal (inflated, deflated, error) NIRPOW char stream NIR shutter power (ON, OFF) EXPSHUT char stream Status of EXP shutter (open, closed, error) EXPSEAL char stream EXP shutter seal (inflated, deflated, error) EXPPOW char stream EXP shutter power (ON, OFF) ILLUM char stream Fiber illuminator (on, off, notready, ready, error, flashing) ZTEMP float64 [degrees] NIR camera temperature ZHUMID float64 [%] NIR camera humidity BTEMP float64 [degrees] blue camera temperature BHUMID float64 [%] blue camera humidity RTEMP float64 [degrees] red camera temperature RHUMID float64 [%] red camera humidity IEBTEMP float64 [degrees] electronics board temperature COLLTEMP float64 [degrees] enclosure temperature near collimator CRYOTEMP float64 [degrees] enclosure temperature near cryostat BZTEMP float64 [degrees] enclosure temperature near NIR shutter MIRROR char stream Serial number for this hardware component MOUNT char stream Serial number for this hardware component EXPMEC char stream Serial number for this hardware component ZDICHR char stream Serial number for this hardware component NIRMEC char stream Serial number for this hardware component RDICHR char stream Serial number for this hardware component BVPHG char stream Serial number for this hardware component ZVPHG char stream Serial number for this hardware component RVPHG char stream Serial number for this hardware component BCAM char stream Serial number for this hardware component ZCAM char stream Serial number for this hardware component RCAM char stream Serial number for this hardware component ============= =========== ===== =============================================================== Notes and Examples ================== Known Issues ------------ * The compressed ``SPEC`` HDU contains the ``ZSIMPLE`` keyword. This would be appropriate in a compressed *primary* HDU but not in a compressed extension. * Some header keywords contain empty values. These will produce warnings when files of this type are examined with ``fitsverify``. Provenance ---------- * 2019-02-21: Revised based on headers from spectrograph functional verification files. * 2019-04-03: Revised based on raw data files created from spectrograph functional verification files. * 2023-03-21: Revised in preparation for first public data release.