===================== sky-CAMERA-EXPID.fits ===================== :Summary: This holds the sky model for a given camera and exposure. :Naming Convention: ``sky-{CAMERA}-{EXPID}.fits``, where ``{CAMERA}`` is one of the spectrograph cameras (*e.g.* ``z1``) and ``{EXPID}`` is the 8-digit exposure ID. :Regex: ``sky-[brz][0-9]-[0-9]{8}\.fits`` :File Type: FITS, 17 MB Contents ======== ====== =============== ===== =================== Number EXTNAME Type Contents ====== =============== ===== =================== HDU0_ SKY IMAGE Sky model in electrons per Angstrom HDU1_ IVAR IMAGE Inverse variance of sky model HDU2_ MASK IMAGE Sky mask (0 = good) HDU3_ WAVELENGTH IMAGE Wavelength in Angstrom HDU4_ STATIVAR IMAGE Statistical-only inverse variance of sky model HDU5_ THRPUTCORR IMAGE Achromatic throughput correction per fiber HDU6_ THRPUTCORR_MOD IMAGE Model multiplicative throughput corrections for each fiber HDU6_ DWAVECOEFF IMAGE Vector of PCA coefficients for wavelength offsets HDU7_ DLSFCOEFF IMAGE Vector of PCA coefficients for LSF size changes HDU8_ SKYGRADPCACOEFF IMAGE Vector of gradient amplitudes for sky gradient spectra ====== =============== ===== =================== The SKY HDU is the sky model per-fiber accounting for different fiber resolutions, but it does *not* include the empirical per-fiber throughput correction in the THRPUTCORR HDU. The final sky model per fiber is ``SKY * THRPUTCORR``. FITS Header Units ================= HDU0 ---- EXTNAME = SKY 2D array of sky flux model of dimension [nspec, nwave] in units of electrons per Ansgtrom (fiber flat fielded). nspec is the number of fibers per camera. nwave in the length of the wavelength array. The spectra of all fibers share the same wavelength grid (given in HDU WAVELENGTH). The sky model is different for each fiber because it is adapted to the resolution of each fiber, it contains corrections on bright sky line, and in some cases an anisotropic component. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ====================== ===================================================================== ======= =============================================== KEY Example Value Type Comment ====================== ===================================================================== ======= =============================================== NAXIS1 2751 int NAXIS2 500 int EXPID 69022 int Exposure number EXPFRAME 0 int Frame number TILEID 80616 int DESI Tile ID FIBASSGN /data/tiles/SVN_tiles/080/fiberassign-080616.fits str Fiber assign fil FLAVOR science str Observation type SEQUENCE DESI str OCS Sequence name PURPOSE Commissioning str Purpose of observing night PROGRAM SV1 BGS+MWS tile 80616 str Program name PROPID 2019B-5000 str Proposal ID OBSERVER DESIObserver str Names of observers LEAD RunManager 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 20201220 int Observing night TIMESYS UTC str Time system used for date-obs DATE-OBS 2020-12-21T02:36:32.099838 str [UTC] Observation data and start time TIME-OBS 02:39:11.845920 str [UTC] Observation start time MJD-OBS 59204.10870486 float Modified Julian Date of observation OPENSHUT 2020-12-21T02:36:32.099838 str Time shutter opened ST 01:10:39.210 str Local Sidereal time at observation start (HH:MM EXPTIME 300.007 float [s] Actual exposure time REQRA 356.0 float [deg] Requested right ascension (observer input REQDEC 29.0 float [deg] Requested declination (observer input) FOCUS 1426.5,-501.4,81.0,-2.6,42.3,169.2 str Telescope focus settings VCCD ON str True (ON) if CCD voltage is on VCCDON 2020-12-09T21:23:21.278481 str Time when CCD voltage was turned on VCCDSEC 969694.4 float [s] CCD on time in seconds TRUSTEMP 11.767 float [deg] Average Telescope truss temperature (only PMIRTEMP 8.925 float [deg] Average primary mirror temperature (nit,e EQUINOX 2000.0 float Epoch of observation MOUNTAZ 266.70224 float [deg] Mount azimuth angle MOUNTDEC 28.999221 float [deg] Mount declination MOUNTEL 71.039837 float [deg] Mount elevation angle MOUNTHA 21.769281 float [deg] Mount hour angle SKYDEC 28.999221 float [deg] Telescope declination (pointing on sky) SKYRA 355.996551 float [deg] Telescope right ascension (pointing on sk TARGTDEC 28.999221 float [deg] Target declination (to TCS) TARGTRA 355.996551 float [deg] Target right ascension (to TCS) USEETC F bool ETC data available if true USESKY T bool DOS Control: use Sky Monitor USEFOCUS T bool DOS Control: use focus HEXTRIM 0.0,0.0,0.0,0.0,0.0,0.0 str Hexapod trim values USEROTAT T bool DOS Control: use rotator ROTOFFST 167.1 float [arcsec] Rotator offset ROTENBLD T bool Rotator enabled ROTRATE 0.0 float [arcsec/min] Rotator rate USEGUIDR T bool DOS Control: use guider USEDONUT T bool DOS Control: use donuts SPECGRPH 6 int Spectrograph logical name (SP) SPECID 7 int Spectrograph serial number (SM) FEEBOX lbnl075 str CCD Controller serial number VESSEL 22 int Cryostat serial number FEEVER v20160312 str CCD Controller version DETFLVER [1]_ 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 850.0 float [deg C] CCD controller CCD temperature RADESYS FK5 str Coordinate reference frame of major/minor axes FILENAME /exposures/desi/specs/20201220/00069022/sp1-00069022.fits.fz str Name 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 DELAYS 13, 13, 25, 25, 8, 3000, 7, 7, 7, 7 str [10] Delay settings CCDPREP purge,clear str CCD prep actions DETSECA [1:2048, 1:2048] str Detector section for quadrant A CDSPARMS 350, 350, 8, 1000 str CDS parameters CRYOTEMP [1]_ 162.97 float [deg K] Cryostat CCD temperature CLOCK15 0.0,0.0 str [V] high rail, low rail CLOCK11 0.0,0.0 str [V] high rail, low rail ORSECA [5:2052, 2050:2081] str Row overscan section for quadrant A CASETEMP 51.9392 float [deg C] CCD controller case temperature AMPSECC [2048:1, 2049:4096] str AMP section for quadrant C CLOCK4 3.9999,-4.0002 str [V] high rail, low rail CLOCK17 3.9999,-4.0002 str [V] high rail, low rail DAC13 0.0,-5.0544 str [V] set value, measured value DAC2 15.9998,15.9032 str [V] set value, measured value DATASECA [5:2052, 2:2049] str Data section for quadrant A DATASECB [2181:4228, 2:2049] str Data section for quadrant B PRESECB [4229:4232, 2:2049] str Prescan section for quadrant B DAC14 0.0,0.8008 str [V] set value, measured value ORSECD [2181:4228, 2082:2113] str Row bias section for quadrant D CCDSIZE 4162,4232 str CCD size in pixels (rows, columns) SETTINGS detectors_sm_20191211.json str Name of DESI CCD settings file PRESECA [1:4, 2:2049] str Prescan section for quadrant A CLOCK14 3.0,-8.0001 str [V] high rail, low rail DAC16 0.0,64.1256 str [V] set value, measured value CCDNAME CCDSM7B str CCD name AMPSECD [4096:2049, 4096:2049] str AMP section for quadrant D PRRSECC [5:2052, 4162:4162] str Row prescan section for quadrant C CCDCFG sn22813_sta_20190405.cfg str CCD configuration file DAC8 26.9998,26.0294 str [V] set value, measured value BIASSECD [2117:2180, 2114:4161] str Bias section for quadrant D PRESECC [1:4, 2114:4161] str Prescan section for quadrant C CCDSECD [2049:4096, 2049:4096] str CCD section for quadrant D CLOCK8 3.0,-8.0001 str [V] high rail, low rail TRIMSECA [5:2052, 2:2049] str Trim section for quadrant A DAC5 0.0,0.0 str [V] set value, measured value BIASSECC [2053:2116, 2114:4161] str Bias section for quadrant C OFFSET0 -1.5,15.8311 str [V] set value, measured value CLOCK18 3.9999,-4.0002 str [V] high rail, low rail CCDTMING default_sta_timing_20180905.txt str CCD timing file TRIMSECD [2181:4228, 2114:4161] str Trim section for quadrant D OFFSET1 -1.5,15.8208 str [V] set value, measured value OFFSET4 -1.100000023841858,0.0105 str [V] set value, measured value DATASECD [2181:4228, 2114:4161] str Data section for quadrant D CLOCK3 6.9999,-2.0001 str [V] high rail, low rail PGAGAIN 5 int Controller gain PRRSECA [5:2052, 1:1] str Row prescan section for quadrant A CLOCK12 3.0,-8.0001 str [V] high rail, low rail CLOCK6 3.9999,-4.0002 str [V] high rail, low rail OFFSET5 -1.100000023841858,-0.0053 str [V] set value, measured value CLOCK2 3.9999,-4.0002 str [V] high rail, low rail CLOCK16 0.0,0.0 str [V] high rail, low rail ORSECB [2181:4228, 2050:2081] str Row overscan section for quadrant B DAC12 0.0,5.0232 str [V] set value, measured value DETSECC [1:2048, 2049:4096] str Detector section for quadrant C DAC15 19.9997,19.6768 str [V] set value, measured value CAMERA b6 str Camera name DAC6 0.0,0.0053 str [V] set value, measured value BIASSECB [2117:2180, 2:2049] str Bias section for quadrant B DAC4 0.0,0.0105 str [V] set value, measured value CLOCK1 3.9999,-4.0002 str [V] high rail, low rail PRRSECD [2181:4228, 4162:4162] str Row prescan section for quadrant D DAC7 0.0,0.0 str [V] set value, measured value DETSECD [2049:4096, 2049:4096] str Detector section for quadrant D ORSECC [5:2052, 2082:2113] str Row overscan section for quadrant C DAC17 -0.0,0.0488 str [V] set value, measured value CRYOPRES [1]_ 9.252e-08 str [mb] Cryostat pressure (IP) AMPSECA [1:2048, 1:2048] str AMP section for quadrant A CLOCK5 3.9999,-4.0002 str [V] high rail, low rail CCDSECA [1:2048, 1:2048] str CCD section for quadrant A DAC9 26.9998,26.252 str [V] set value, measured value CLOCK0 3.9999,-4.0002 str [V] high rail, low rail DETSECB [2049:4096, 1:2048] str Detector section for quadrant B DAC1 15.9998,15.8311 str [V] set value, measured value DAC3 15.9998,15.8517 str [V] set value, measured value DAC11 26.9998,26.9198 str [V] set value, measured value CLOCK9 3.0,-8.0001 str [V] high rail, low rail DIGITIME 41.6984 float [s] Time to digitize image OFFSET2 -1.5,15.9135 str [V] set value, measured value PRESECD [4229:4232, 2114:4161] str Prescan section for quadrant D CLOCK10 3.0,-8.0001 str [V] high rail, low rail DAC0 15.9998,15.8311 str [V] set value, measured value TRIMSECB [2181:4228, 2:2049] str Trim section for quadrant B OFFSET3 -1.5,15.8414 str [V] set value, measured value AMPSECB [2049:4096, 2048:1] str AMP section for quadrant B CPUTEMP 51.334 float [deg C] CCD controller CPU temperature CCDSECC [1:2048, 2049:4096] str CCD section for quadrant C OFFSET7 -1.100000023841858,0.0 str [V] set value, measured value BLDTIME 0.3499 float [s] Time to build image DATASECC [5:2052, 2114:4161] str Data section for quadrant C DETECTOR sn22813 str Detector (ccd) identification OFFSET6 -1.100000023841858,0.0053 str [V] set value, measured value BIASSECA [2053:2116, 2:2049] str Bias section for quadrant A TRIMSECC [5:2052, 2114:4161] str Trim section for quadrant C PRRSECB [2181:4228, 1:1] str Row prescan section for quadrant B CCDSECB [2049:4096, 1:2048] str CCD section for quadrant B DAC10 26.9998,26.9198 str [V] set value, measured value CLOCK13 3.0,-8.0001 str [V] high rail, low rail CLOCK7 6.9999,-2.0001 str [V] high rail, low rail REQTIME 300.0 float [s] Requested exposure time OBSID kp4m20201221t023911 str Unique observation identifier PROCTYPE RAW str Data processing level PRODTYPE image str Data product type CHECKSUM VAChW8AfVAAfV7Af str HDU checksum updated 2022-02-14T06:13:54 DATASUM 1301167967 str data unit checksum updated 2022-02-14T06:13:54 GAINA 1.29 float e/ADU (gain applied to image) SATULEVA 40000.0 float saturation or non lin. level, in ADU, inc. bias OSTEPA 1.21893160851323 float ADUs (max-min of median overscan per row) OMETHA AVERAGE str use average overscan OVERSCNA 1201.407080585313 float ADUs (gain not applied) OBSRDNA 3.932320693814749 float electrons (gain is applied) SATUELEA 50050.18486604495 float saturation or non lin. level, in electrons GAINB 1.284 float e/ADU (gain applied to image) SATULEVB 65535.0 float saturation or non lin. level, in ADU, inc. bias OSTEPB 0.9970038118117373 float ADUs (max-min of median overscan per row) OMETHB AVERAGE str use average overscan OVERSCNB 1212.197611701435 float ADUs (gain not applied) OBSRDNB 3.323361580066672 float electrons (gain is applied) SATUELEB 82590.47826657536 float saturation or non lin. level, in electrons GAINC 1.292 float e/ADU (gain applied to image) SATULEVC 40000.0 float saturation or non lin. level, in ADU, inc. bias OSTEPC 0.7691677607072052 float ADUs (max-min of median overscan per row) OMETHC AVERAGE str use average overscan OVERSCNC 1178.422505897216 float ADUs (gain not applied) OBSRDNC 3.252427649816138 float electrons (gain is applied) SATUELEC 50157.4781223808 float saturation or non lin. level, in electrons GAIND 1.295 float e/ADU (gain applied to image) SATULEVD 44000.0 float saturation or non lin. level, in ADU, inc. bias OSTEPD 0.9395222094608471 float ADUs (max-min of median overscan per row) OMETHD AVERAGE str use average overscan OVERSCND 1174.800960708566 float ADUs (gain not applied) OBSRDND 3.333804957383686 float electrons (gain is applied) SATUELED 55458.6327558824 float saturation or non lin. level, in electrons FIBERMIN 3000 int BBKGMINA [1]_ -0.2077800596230136 float BBKGMAXA [1]_ 0.5254324469128164 float BBKGMINB [1]_ -0.2033242713025349 float BBKGMAXB [1]_ 0.4258502359052168 float BBKGMINC [1]_ -0.1314577356495719 float BBKGMAXC [1]_ 0.4236035445727393 float BBKGMIND [1]_ -0.2582211042496522 float BBKGMAXD [1]_ 0.3659635169905933 float LONGSTRN OGIP 1.0 str The OGIP Long String Convention may be used. MODULE CI str Image Sources/Component COSMSPLT F bool Cosmics split exposure if true MAXSPLIT 0 int Number of allowed exposure splits SPLITIDS [1]_ 69022 str List of expids for split exposures OBSTYPE SCIENCE str Spectrograph observation type MANIFEST F bool DOS exposure manifest OBJECT str Object name SEQNUM 1 int Number of exposure in sequence CAMSHUT open str Shutter status during observation ACQTIME 15.0 float [s] acqusition image exposure time GUIDTIME 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) 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 off str Fibers are backlit if True AIRMASS 1.060311 float Airmass PMREADY T bool Primary mirror ready PMCOVER open str Primary mirror cover PMCOOL off str Primary mirror cooling DOMSHUTU open str Upper dome shutter DOMSHUTL open str Lower dome shutter DOMLIGHH off str High dome lights DOMLIGHL off str Low dome lights DOMEAZ 255.166 float [deg] Dome azimuth angle DOMINPOS T bool Dome is in position GUIDOFFR -0.052283 float [arcsec] Cummulative guider offset (RA) GUIDOFFD 0.136634 float [arcsec] Cummulative guider offset (dec) MOONDEC -8.975162 float [deg] Moon declination at start of exposure MOONRA 352.538429 float [deg] Moon RA at start of exposure INCTRL T bool DESI in control INPOS T bool Mount in position MNTOFFD -15.76 float [arcsec] Mount offset (dec) MNTOFFR 29.32 float [arcsec] Mount offset (RA) PARALLAC 75.635085 float [deg] Parallactic angle TARGTAZ 267.074049 float [deg] Target azimuth TARGTEL 70.563787 float [deg] Target elevation TRGTOFFD 0.0 float [arcsec] Telescope target offset (dec) TRGTOFFR 0.0 float [arcsec] Telescope target offset (RA) ZD 19.436213 float [deg] Telescope zenith distance TILERA 356.0 float RA of tile given in fiberassign file TILEDEC 29.0 float DEC of tile given in fiberassign file TCSST 01:13:18.668 str Local Sidereal time reported by TCS (HH:MM:SS) TCSMJD 59204.110981 float MJD reported by TCS USETURB [1]_ T bool Turbulence corrections are applied if true ACQCAM GUIDE0,GUIDE2,GUIDE3,GUIDE5,GUIDE7,GUIDE8 str Acquisition cameras used GUIDECAM 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 65.78,85.28 str [deg] requested ADC angles ADCCORR T bool Correct pointing for ADC setting if True ADC1PHI 65.780005 float [deg] ADC 1 angle ADC2PHI 85.279991 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 0.0 float ADC 2 number of revs ADC1STAT STOPPED str ADC 1 status ADC2STAT STOPPED str ADC 2 status HEXPOS 1426.5,-501.3,81.0,-2.6,42.3,171.9 str Hexapod position RESETROT F bool DOS Control: reset hex rotator USEPOS T bool Fiber positioner data available if true PETALS PETAL0,PETAL1,PETAL2,PETAL3,PETAL4,PETAL5,PETAL6,PETAL7,PETAL8,PETAL9 str Participating petals POSCYCLE 1 int Number of current iteration POSONTGT 3626 int Number of positioners on target POSNOTON [1]_ 6 int Number of enabled positioners not on target POSONFRC 0.8613 float Fraction of positioners on target POSDISAB 37 int Number of disabled positioners POSENABL 4210 int Number of enabled positioners POSRMS 0.0171 float [mm] RMS of positioner accuracy TURBRMS [1]_ 0.0071 float [mm] RMS of turbulence correction POSITER 1 int Positioning Control: max. number of pos. cycles POSFRACT 0.95 float POSTOLER 0.01 float Positioning Control: in_position tolerance (mm) POSMVALL T bool Positioning Control: move all positioners GUIDMODE catalog str Guider mode USEAOS [1]_ F bool DOS Control: AOS data available if true USESPCTR T bool DOS Control: use spectrographs SPCGRPHS SP0,SP1,SP2,SP3,SP4,SP5,SP6,SP7,SP8,SP9 str Participating spectrograph ILLSPECS [1]_ SP0,SP1,SP2,SP3,SP4,SP5,SP6,SP7,SP8,SP9 str Participating illuminate s CCDSPECS [1]_ SP0,SP1,SP2,SP3,SP4,SP5,SP6,SP7,SP8,SP9 str Participating ccd spectrog TDEWPNT -16.043 float Telescope air dew point TAIRFLOW 0.0 float Telescope air flow TAIRITMP 11.8 float [deg] Telescope air in temperature TAIROTMP 11.7 float [deg] Telescope air out temperature TAIRTEMP 10.65 float [deg] Telescope air temperature TCASITMP 0.0 float [deg] Telescope Cass Cage in temperature TCASOTMP 10.8 float [deg] Telescope Cass Cage out temperature TCSITEMP 9.3 float [deg] Telescope center section in temperature TCSOTEMP 10.8 float [deg] Telescope center section out temperature TCIBTEMP 0.0 float [deg] Telescope chimney IB temperature TCIMTEMP 0.0 float [deg] Telescope chimney IM temperature TCITTEMP 0.0 float [deg] Telescope chimney IT temperature TCOSTEMP 0.0 float [deg] Telescope chimney OS temperature TCOWTEMP 0.0 float [deg] Telescope chimney OW temperature TDBTEMP 9.3 float [deg] Telescope dec bore temperature TFLOWIN 0.0 float Telescope flow rate in TFLOWOUT 0.0 float Telescope flow rate out TGLYCOLI 9.9 float [deg] Telescope glycol in temperature TGLYCOLO 9.8 float [deg] Telescope glycol out temperature THINGES 11.4 float [deg] Telescope hinge S temperature THINGEW 11.2 float [deg] Telescope hinge W temperature TPMAVERT 8.931 float [deg] Telescope mirror averagetemperature TPMDESIT 7.0 float [deg] Telescope mirror desired temperature TPMEIBT 8.6 float [deg] Telescope mirror EIB temperature TPMEITT 8.6 float [deg] Telescope mirror EIT temperature TPMEOBT 8.5 float [deg] Telescope mirror EOB temperature TPMEOTT 9.0 float [deg] Telescope mirror EOT temperature TPMNIBT 8.4 float [deg] Telescope mirror NIB temperature TPMNITT 8.9 float [deg] Telescope mirror NIT temperature TPMNOBT 8.8 float [deg] Telescope mirror NOB temperature TPMNOTT 9.1 float [deg] Telescope mirror NOT temperature TPMRTDT 9.0 float [deg] Telescope mirror RTD temperature TPMSIBT 8.6 float [deg] Telescope mirror SIB temperature TPMSITT 8.8 float [deg] Telescope mirror SIT temperature TPMSOBT 8.2 float [deg] Telescope mirror SOB temperature TPMSOTT 8.9 float [deg] Telescope mirror SOT temperature TPMSTAT ready str Telescope mirror status TPMWIBT 8.2 float [deg] Telescope mirror WIB temperature TPMWITT 9.1 float [deg] Telescope mirror WIT temperature TPMWOBT 8.3 float [deg] Telescope mirror WOB temperature TPMWOTT 8.9 float [deg] Telescope mirror WOT temperature TPCITEMP 8.5 float [deg] Telescope primary cell in temperature TPCOTEMP 8.6 float [deg] Telescope primary cell out temperature TPR1HUM 0.0 float Telescope probe 1 humidity TPR1TEMP 0.0 float [deg] Telescope probe1 temperature TPR2HUM 0.0 float Telescope probe 2 humidity TPR2TEMP 0.0 float [deg] Telescope probe2 temperature TSERVO 40.0 float Telescope servo setpoint TTRSTEMP 11.4 float [deg] Telescope top ring S temperature TTRWTEMP 11.0 float [deg] Telescope top ring W temperature TTRUETBT -4.2 float [deg] Telescope truss ETB temperature TTRUETTT 11.2 float [deg] Telescope truss ETT temperature TTRUNTBT 10.9 float [deg] Telescope truss NTB temperature TTRUNTTT 11.2 float [deg] Telescope truss NTT temperature TTRUSTBT 10.7 float [deg] Telescope truss STB temperature TTRUSTST 10.8 float [deg] Telescope truss STS temperature TTRUSTTT 11.1 float [deg] Telescope truss STT temperature TTRUTSBT 11.8 float [deg] Telescope truss TSB temperature TTRUTSMT 11.8 float [deg] Telescope truss TSM temperature TTRUTSTT 11.8 float [deg] Telescope truss TST temperature TTRUWTBT 10.5 float [deg] Telescope truss WTB temperature TTRUWTTT 10.9 float [deg] Telescope truss WTT temperature ALARM F bool UPS major alarm or check battery ALARM-ON F bool UPS active alarm condition BATTERY 100.0 float [%] UPS Battery left SECLEFT 5178.0 float [s] UPS Seconds left UPSSTAT [1]_ System Normal - On Line(7) str UPS Status INAMPS 70.4 float [A] UPS total input current OUTWATTS 5000.0,7200.0,4800.0 str [W] UPS Phase A, B, C output watts COMPDEW -12.9 float [deg C] Computer room dewpoint COMPHUM 7.4 float [%] Computer room humidity COMPAMB 19.5 float [deg C] Computer room ambient temperature COMPTEMP 24.5 float [deg C] Computer room hygrometer temperature DEWPOINT 11.5 float [deg C] (outside) dewpoint HUMIDITY 10.0 float [%] (outside) humidity PRESSURE 795.0 float [torr] (outside) air pressure OUTTEMP 0.0 float [deg C] outside temperature WINDDIR 55.0 float [deg] wind direction WINDSPD 27.3 float [m/s] wind speed GUST 20.6 float [m/s] Wind gusts speed AMNIENTN 13.5 float [deg C] ambient temperature north CFLOOR 8.9 float [deg C] temperature on C floor NWALLIN 13.9 float [deg C] temperature at north wall inside NWALLOUT 9.6 float [deg C] temperature at north wall outside WWALLIN 12.9 float [deg C] temperature at west wall inside WWALLOUT 10.6 float [deg C] temperature at west wall outside AMBIENTS 14.8 float [deg C] ambient temperature south FLOOR 12.6 float [deg C] temperature at floor (LCR) EWALLCMP 10.8 float [deg C] temperature at east wall, computer room EWALLCOU 10.6 float [deg C] temperature at east wall, Coude room ROOF 10.3 float [deg C] temperature on roof ROOFAMB 10.6 float [deg C] ambient temperature on roof DOMEBLOW 10.4 float [deg C] temperature at dome back, lower DOMEBUP 10.7 float [deg C] temperature at dome back, upper DOMELLOW 10.8 float [deg C] temperature at dome left, lower DOMELUP 10.8 float [deg C] temperature at dome left, upper DOMERLOW 10.6 float [deg C] temperature at dome right, lower DOMERUP 10.5 float [deg C] temperature at dome right, upper PLATFORM 10.4 float [deg C] temperature at platform SHACKC 14.4 float [deg C] temperature at shack ceiling SHACKW 13.7 float [deg C] temperature at shack wall STAIRSL 10.5 float [deg C] temperature at stairs, lower STAIRSM 10.4 float [deg C] temperature at stairs, mid STAIRSU 10.6 float [deg C] temperature at stairs, upper TELBASE 9.6 float [deg C] temperature at telescope base UTILWALL 11.1 float [deg C] temperature at utility room wall UTILROOM 10.9 float [deg C] temperature in utilitiy room TNFSPROC [1]_ 8.1963 float [s] PlateMaker NFSPROC processing time TGFAPROC [1]_ 7.9212 float [s] PlateMaker GFAPROC processing time SIMGFAP F bool DOS Control: simulate GFAPROC USEFVC T bool DOS Control: use fvc USEFID T bool DOS Control: use fiducials USEILLUM T bool DOS Control: use illuminator USEXSRVR T bool DOS Control: use exposure server USEOPENL T bool DOS Control: use open loop move USEMIDPT [1]_ T bool Use exposure midpoint if true STOPGUDR T bool DOS Control: stop guider STOPFOCS T bool DOS Control: stop focus STOPSKY T bool DOS Control: stop sky monitor KEEPGUDR F bool DOS Control: keep guider running KEEPFOCS F bool DOS Control: keep focus running KEEPSKY F bool DOS Control: keep sky mon. running REACQUIR F bool DOS Control: reacquire same files EXCLUDED str Components excluded from this exposure PMVER [1]_ desi-138368 str PlateMaker/Dervish version FVCTIME [1]_ 2.0 float [s] FVC exposure time SIMGFACQ F bool POSCNVGD [1]_ F bool Number of positioners converged GUIEXPID 69022 int Guider exposure id at start of spectro exp. IGFRMNUM 12 int Guider frame number at start of spectro exp. FOCEXPID 69022 int Focus exposure id at start of spectro exp. IFFRMNUM 1 int Focus frame number at start of spectro exp. TMEBTEXP [1]_ 1219.825 float [s] Time between (DESI) exposures SKYEXPID 69022 int Sky exposure id at start of spectro exp. ISFRMNUM 1 int Sky frame number at start of spectro exp. FGFRMNUM 46 int Guider frame number at end of spectro exp. FFFRMNUM 6 int Focus frame number at end of spectro exp. FSFRMNUM 5 int Sky frame number at end of spectro exp. ETCSKYLV [1]_ 15.1381 float [unit?] ETC skylevel HELIOCOR 0.9999115198216216 float NSPEC 500 int Number of spectra WAVEMIN 3600.0 float First wavelength [Angstroms] WAVEMAX 5800.0 float Last wavelength [Angstroms] WAVESTEP 0.8 float Wavelength step size [Angstroms] SPECTER 0.10.0 str https://github.com/desihub/specter IN_PSF SPECPROD/exposures/20201220/00069022/psf-b6-00069022.fits str Input sp IN_IMG SPECPROD/preproc/20201220/00069022/preproc-b6-00069022.fits str ORIG_PSF SPECPROD/calibnight/20201220/psfnight-b6-20201220.fits str BUNIT electron/Angstrom str IN_FRAME SPECPROD/exposures/20201220/00069022/frame-b6-00069022.fits str FIBERFLT SPECPROD/exposures/20201220/00069022/fiberflatexp-b6-00069022.fits str SP1NIRT [1]_ 139.91 float [K] SP1 NIR temperature SP4NIRT [1]_ 139.96 float [K] SP4 NIR temperature PMTRANS [1]_ 96.38 float [%] PlateMaker GFAPROC transparency SUNRA [1]_ 16.188197 float [deg] Sun RA at start of exposure SP3REDT [1]_ 139.96 float [K] SP3 red temperature SP2NIRP [1]_ 5.108e-08 float [mb] SP2 NIR pressure SP6NIRP [1]_ 2.875e-07 float [mb] SP6 NIR pressure SP8REDP [1]_ 6.99e-08 float [mb] SP8 red pressure SP4REDP [1]_ 4.945e-08 float [mb] SP4 red pressure SP0NIRP [1]_ 5.598e-08 float [mb] SP0 NIR pressure SP1REDP [1]_ 5.142e-08 float [mb] SP1 red pressure SP5NIRT [1]_ 139.94 float [K] SP5 NIR temperature SP8BLUP [1]_ 8.113e-08 float [mb] SP8 blue pressure SP1REDT [1]_ 139.89 float [K] SP1 red temperature SP3NIRT [1]_ 140.01 float [K] SP3 NIR temperature SP6BLUP [1]_ 7.209e-08 float [mb] SP6 blue pressure SP9BLUP [1]_ 1.181e-07 float [mb] SP9 blue pressure SP2REDP [1]_ 8.846e-08 float [mb] SP2 red pressure USESPLIT [1]_ T bool Exposure splits are allowed SP7REDT [1]_ 139.99 float [K] SP7 red temperature SP9NIRT [1]_ 139.89 float [K] SP9 NIR temperature SP0REDP [1]_ 4.896e-08 float [mb] SP0 red pressure SP7NIRP [1]_ 4.315e-08 float [mb] SP7 NIR pressure SP2REDT [1]_ 139.99 float [K] SP2 red temperature SP7REDP [1]_ 5.383e-08 float [mb] SP7 red pressure SP6NIRT [1]_ 139.89 float [K] SP6 NIR temperature SP6REDP [1]_ 5.397e-08 float [mb] SP6 red pressure SP8REDT [1]_ 139.94 float [K] SP8 red temperature FRAMES [1]_ None Unknown Number of Frames in Archive SP9REDT [1]_ 140.01 float [K] SP9 red temperature SP2NIRT [1]_ 139.91 float [K] SP2 NIR temperature SP4BLUP [1]_ 4.978e-08 float [mb] SP4 blue pressure SP8NIRP [1]_ 4.945e-08 float [mb] SP8 NIR pressure SPLITEXP [1]_ F bool Split exposure part of a visit SEQSTART [1]_ 2021-04-07T03:54:14.413292 str Start time of sequence processing STARTADJ [1]_ 2022-03-18T03:57:35.888348 str Time sequence starts adjusting the inst SP8NIRT [1]_ 139.99 float [K] SP8 NIR temperature SP7BLUT [1]_ 163.02 float [K] SP7 blue temperature SP5REDP [1]_ 4.693e-08 float [mb] SP5 red pressure SP5NIRP [1]_ 7.197e-08 float [mb] SP5 NIR pressure SP5BLUT [1]_ 163.02 float [K] SP5 blue temperature SP0BLUP [1]_ 9.122e-08 float [mb] SP0 blue pressure SP1NIRP [1]_ 4.585e-08 float [mb] SP1 NIR pressure TCSKDEC [1]_ 0.3 0.003 0.00003 str TCS Kalman (dec) SP6REDT [1]_ 139.94 float [K] SP6 red temperature TCSPIDEC [1]_ 1.0,0.0,0.0,0.0 str TCS PI settings (P, I (gain, error window, satu TCSGRA [1]_ 0.3 float TCS simple gain (RA) TCSGDEC [1]_ 0.3 float TCS simple gain (dec) SP1BLUT [1]_ 163.02 float [K] SP1 blue temperature SP9NIRP [1]_ 5.207e-08 float [mb] SP9 NIR pressure SP0NIRT [1]_ 139.89 float [K] SP0 NIR temperature SP4BLUT [1]_ 163.02 float [K] SP4 blue temperature SP9BLUT [1]_ 163.02 float [K] SP9 blue temperature SP9REDP [1]_ 4.884e-08 float [mb] SP9 red pressure PMSEEING [1]_ 1.19 float [arcsec] PlateMaker GFAPROC seeing SP0REDT [1]_ 139.96 float [K] SP0 red temperature SP2BLUT [1]_ 163.02 float [K] SP2 blue temperature TCSKRA [1]_ 0.3 0.003 0.00003 str TCS Kalman (RA) SP3NIRP [1]_ 4.194e-08 float [mb] SP3 NIR pressure TCSPIRA [1]_ 1.0,0.0,0.0,0.0 str TCS PI settings (P, I (gain, error window, satu SP8BLUT [1]_ 162.9 float [K] SP8 blue temperature VISITIDS [1]_ 83717 str List of expids for a visit (same tile) MOONSEP [1]_ 138.187 float [deg] Moon Separation SP5BLUP [1]_ 1.125e-07 float [mb] SP5 blue pressure TCSMFDEC [1]_ 1 int TCS moving filter length (dec) SP4NIRP [1]_ 6.595e-08 float [mb] SP4 NIR pressure SP7BLUP [1]_ 9.98e-08 float [mb] SP7 blue pressure SP2BLUP [1]_ 6.432e-08 float [mb] SP2 blue pressure SUNDEC [1]_ 6.890581 float [deg] Sun declination at start of exposure SP1BLUP [1]_ 8.039e-08 float [mb] SP1 blue pressure SKYLEVEL [1]_ 1.398 float [counts?] ETC sky level TCSMFRA [1]_ 1 int TCS moving filter length (RA) SP3BLUP [1]_ 8.133e-08 float [mb] SP3 blue pressure SP5REDT [1]_ 139.99 float [K] SP5 red temperature SP7NIRT [1]_ 139.96 float [K] SP7 NIR temperature SP0BLUT [1]_ 163.02 float [K] SP0 blue temperature SP3REDP [1]_ 6.033e-08 float [mb] SP3 red pressure NTSSURVY [1]_ sv3 str NTS survey name SP3BLUT [1]_ 163.04 float [K] SP3 blue temperature SP4REDT [1]_ 140.01 float [K] SP4 red temperature SP6BLUT [1]_ 163.02 float [K] SP6 blue temperature SEQID [1]_ 6 requests str Exposure sequence identifier SEQTOT [1]_ 6 int Total number of exposures in sequence MINTIME [1]_ 120.0 float [s] Minimum exposure time (from NTS, used by ET MIDTIME [1]_ 840.2095 float [s] Exposure midpoint time used by PlateMaker SEEING [1]_ None float [arcsec] ETC/PM seeing ETCTEFF [1]_ 226.882385 float [s] ETC effective exposure time ETCPREV [1]_ 0.0 float [s] ETC cummulative t_eff for visit ETCSPLIT [1]_ 1 int ETC split sequence number for this visit TOTTEFF [1]_ 225.6017 float [s] Total effective exposure time for visit TRANSPAR [1]_ None float ETC/PM transparency ACQFWHM [1]_ 0.890634 float [arcsec] FWHM of guide star PSF in acquisition POSCVFRC [1]_ 0.4956 float Fraction of converged positioners ETCTRANS [1]_ 0.915827 float ETC averaged TRANSP normalized to 1 SLEWANGL [1]_ 16.255 float [deg] Slew Angle SLEWTIME [1]_ 123.315 float [s] Slew Time SBPROF [1]_ BGS str Profile used by ETC ETCREAL [1]_ 392.495819 float [s] ETC real open shutter time ETCTHRUB [1]_ 0.964227 float ETC averaged thruput (BGS profile) ETCFRACE [1]_ 0.45002 float ETC transparency weighted average of FFRAC (ELG ETCPROF [1]_ BGS str ETC source brightness profile ACTTEFF [1]_ 226.882385 float [s] Actual effective exposure time ESTTIME [1]_ 366.345 float [s] Estimated exposure time for visit (from ETC ETCTHRUP [1]_ 1.034724 float ETC averaged thruput (PSF profile) PMTRANSP [1]_ 98.17 float [%] PlateMaker GFAPROC transparency ETCFRACP [1]_ 0.634939 float ETC transparency weighted average of FFRAC (PSF ETCVERS [1]_ 0.1.12-3-g12b54bb str ETC version ETCFRACB [1]_ 0.199883 float ETC transparency weighted average of FFRAC (BGS MAXTIME [1]_ 5400.0 float [s] Maximum exposure time for entire visit (fro NTSPROG [1]_ BRIGHT str NTS program name CONVERGD [1]_ F bool Positioning loop converged (CNFRC>0.95) ETCTHRUE [1]_ 0.999856 float ETC averaged thruput (ELG profile) ETCSKY [1]_ 1.924707 float ETC averaged, normalized sky camera flux ETCSEENG [1]_ 0.8906 float [arcsec] ETC seeing REQTEFF [1]_ 220.0 float [s] Requested effective exposure time USESPLITS [1]_ T bool Exposure splits are allowed UPSSTAT [1]_ 17826.0 float UPS Status ====================== ===================================================================== ======= =============================================== .. [1] Optional Data: FITS image [float32, 2326x500] HDU1 ---- EXTNAME = IVAR Inverse variance of sky model in units of (electrons per Ansgtrom)^-2. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 2326 int NAXIS2 500 int CHECKSUM WMCiXJ9ZWJCfWJ9Z str HDU checksum updated 2021-07-08T02:23:26 DATASUM 3732109365 str data unit checksum updated 2021-07-08T02:23:26 ======== ================ ==== ============================================== Data: FITS image [float32, 2326x500] HDU2 ---- EXTNAME = MASK Sky mask; 0=good. See the :doc:`bitmask documentation ` page for the definition of the bits. Prior to desispec/0.24.0 and software release 18.9, the MASK HDU was compressed. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 2326 int NAXIS2 500 int BSCALE 1 int BZERO 2147483648 int CHECKSUM kIf3lGc0kGc0kGc0 str HDU checksum updated 2021-07-08T02:23:26 DATASUM 581500 str data unit checksum updated 2021-07-08T02:23:26 ======== ================ ==== ============================================== Data: FITS image [int32, 2326x500] HDU3 ---- EXTNAME = WAVELENGTH 1D array of wavelengths, in Angstrom. Note the wavelength is in the solar system barycenter frame, so that the sky flux array can be directly subtracted to the flat-fielded frame fluxes which are on the same wavelength grid. In order to compare the sky spectrum of different exposures, or with litterature data, one has to convert back the wavelength array to the observer frame, by dividing it by Doppler factor saved in header keyword HELIOCOR in HDU0. See also the frame :ref:`WAVELENGTH documentation ` for more details. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 2326 int BUNIT Angstrom str Wavelength units CHECKSUM 7BAoAA3l7A9lAA9l str HDU checksum updated 2021-07-08T02:23:26 DATASUM 1502044794 str data unit checksum updated 2021-07-08T02:23:26 ======== ================ ==== ============================================== Data: FITS image [float32, 2326] HDU4 ---- EXTNAME = STATIVAR Statistical-only inverse variance of sky model. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 2326 int NAXIS2 500 int CHECKSUM SAMkT5JjSAJjS3Jj str HDU checksum updated 2021-07-08T02:23:27 DATASUM 3877575180 str data unit checksum updated 2021-07-08T02:23:27 ======== ================ ==== ============================================== Data: FITS image [float32, 2326x500] HDU5 ---- EXTNAME = THRPUTCORR Multiplicative achromatic throughput correction per fiber. This term has been measured on the bright sky lines of each fiber from the exposure (EXPID). It is used as a correction to the mean sky model. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 500 int CHECKSUM VPA5WO62VOA2VO52 str HDU checksum updated 2021-07-08T02:23:27 DATASUM 63793519 str data unit checksum updated 2021-07-08T02:23:27 ======== ================ ==== ============================================== Data: FITS image [float32, 500] HDU6 ---- EXTNAME = THRPUTCORR_MOD Model multiplicative throughput corrections for each fiber. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 500 int CHECKSUM VPA5WO62VOA2VO52 str HDU checksum updated 2021-07-08T02:23:27 DATASUM 63793519 str data unit checksum updated 2021-07-08T02:23:27 ======== ================ ==== ============================================== Data: FITS image [float32, 500] HDU7 ---- EXTNAME = DWAVECOEFF Vector of PCA coefficients for wavelength offsets. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 4 int CHECKSUM VPA5WO62VOA2VO52 str HDU checksum updated 2021-07-08T02:23:27 DATASUM 63793519 str data unit checksum updated 2021-07-08T02:23:27 ======== ================ ==== ============================================== Data: FITS image [float32, 4] HDU8 ---- EXTNAME = DLSFCOEFF Vector of PCA coefficients for LSF size changes. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 4 int CHECKSUM VPA5WO62VOA2VO52 str HDU checksum updated 2021-07-08T02:23:27 DATASUM 63793519 str data unit checksum updated 2021-07-08T02:23:27 ======== ================ ==== ============================================== Data: FITS image [float32, 4] HDU9 ---- EXTNAME = SKYGRADPCACOEFF Vector of gradient amplitudes for sky gradient spectra. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 4 int CHECKSUM VPA5WO62VOA2VO52 str HDU checksum updated 2021-07-08T02:23:27 DATASUM 63793519 str data unit checksum updated 2021-07-08T02:23:27 ======== ================ ==== ============================================== Data: FITS image [float32, 4]