| Summary: | Raw images from focus cameras. |
|---|---|
| Naming Convention: | focus-EXPID.fits.fz, where EXPID is the zero-padded
8-digit exposure ID. |
| Regex: | focus-[0-9]{8}\.fits\.fz |
| File Type: | FITS, 91 MB |
| Number | EXTNAME | Type | Contents |
|---|---|---|---|
| HDU0 | FOCUS | Empty HDU | Header keywords only |
| HDU1 | FOCUS4 | Compressed IMAGE | Focus image 4 |
| HDU2 | FOCUS4T | BINTABLE | Focus image 4 metadata |
| HDU3 | FOCUS1 | Compressed IMAGE | Focus image 1 |
| HDU4 | FOCUS1T | BINTABLE | Focus image 1 metadata |
| HDU5 | FOCUS9 | Compressed IMAGE | Focus image 9 |
| HDU6 | FOCUS9T | BINTABLE | Focus image 9 metadata |
| HDU7 | FOCUS6 | Compressed IMAGE | Focus image 6 |
| HDU8 | FOCUS6T | BINTABLE | Focus image 6 metadata |
Raw images from focus cameras. The data are deliberately out of focus with one half positive out of focus and the other half negative. There is a region in between that vignetted by the filter holder.
The FOCUSn data will be 3D[nframes, ny, nx] such that
data[i] is the 2D GFA frame number i. Row i of the
FOCUSnT table will contain the metadata about that frame, e.g. the
DATE-OBS and EXPTIME.
Note that other than the blank data primary HDU, the order of the other
HDUs is arbitrary and some FOCUSn(T) HDUs may even be missing. The
nominal set (1,4,6,9) is the plan for full DESI, but particularly during
commissioning other combinations will appear in the data. Always access by
EXTNAME not HDU number.
Other than the name and number of the HDUs, the structure of this format is identical to the guide GFA raw data.
EXTNAME = FOCUS
Header keywords only.
.. collapse:: Required Header Keywords Table
.. rst-class:: keywords
======== ======================================================== ======= ===============================================
KEY Example Value Type Comment
======== ======================================================== ======= ===============================================
MODULE FOCUS str Image Sources/Component
EXPID 118526 int Exposure number
FRAMES 9 int Number of Frames in Archive
TILEID 4403 int DESI Tile ID
FLAVOR science str Observation type
PURPOSE Main Survey str Purpose of observing night
PROGRAM DARK str Program name
NIGHT 20220113 int Observing night
ACQTIME None Unknown [s] acqusition image exposure time
GUIDTIME None Unknown [s] guider GFA exposure time
FOCSTIME 60.0 float [s] focus GFA exposure time
SKYTIME None Unknown [s] sky camera exposure time (acquisition)
REQRA 170.239 float [deg] Requested right ascension (observer input
REQDEC -7.093 float [deg] Requested declination (observer input)
DELTARA 0.0 float [arcsec] Offset], right ascension, observer inp
DELTADEC 0.0 float [arcsec] Offset], declination, observer input
FOCUS 946.6,-231.6,-83.4,-18.3,9.8,139.4 str Telescope focus settings
TRUSTEMP 12.267 float [deg] Average Telescope truss temperature (only
PMIRTEMP 11.675 float [deg] Average primary mirror temperature (nit,e
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)
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 FOCUS1,FOCUS4,FOCUS6,FOCUS9 str Focus cameras used for this exposure
SKYCAM SKYCAM0,SKYCAM1 str Sky cameras used for this exposure
ADC1PHI None Unknown [deg] ADC 1 angle
ADC2PHI None Unknown [deg] ADC 2 angle
HEXPOS 946.7,-231.6,-83.4,-18.3,9.9,138.8 str Hexapod position
DOSVER trunk str DOS software version
CONSTVER DESI:CURRENT str Constants version
ARCHIVE /exposures/desi/20220113/00118526/focus-00118526.fits.fz str
CHECKSUM FAA2H992FAA2F772 str HDU checksum updated 2022-01-14T11:13:59
DATASUM 0 str data unit checksum updated 2022-01-14T11:13:59
======== ======================================================== ======= ===============================================
Empty HDU.
EXTNAME = FOCUS4
TODO: description needed
.. collapse:: Required Header Keywords Table
.. rst-class:: keywords
======== ==================================================== ======= ===============================================
KEY Example Value Type Comment
======== ==================================================== ======= ===============================================
NAXIS1 8 int width of table in bytes
NAXIS2 9288 int number of rows in table
ZTILE3 1 int size of tiles to be compressed
BZERO 32768 int offset data range to that of unsigned short
BSCALE 1 int default scaling factor
DEVICE FOCUS4 str Device/controller name
UNIT 4 int Unit number/letter
UNITTYPE FOCUS str Image Sources/Component
EXPID 118526 int Exposure number
FRAMES 9 int Number of Frames in Archive
TILEID 4403 int DESI Tile ID
FIBASSGN /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 2022-01-14T11:03:58.542861 str [UTC] Observation data and start time
MJD-OBS 59593.46109425 float Modified Julian Date of observation
OPENSHUT 2022-01-14T11:03:58.542861 str Time shutter opened
ST 11:14:12.2376 str Local Sidereal time at observation start (HH:MM
FOCSTIME 60.0 float [s] focus GFA exposure time
REQRA 170.239 float [deg] Requested right ascension (observer input
REQDEC -7.093 float [deg] Requested declination (observer input)
DELTARA None Unknown [arcsec] Offset], right ascension, observer inp
DELTADEC None Unknown [arcsec] Offset], declination, observer input
FOCUS 946.6,-231.6,-83.4,-18.3,9.8,139.4 str Telescope focus settings
TRUSTEMP 12.267 float [deg] Average Telescope truss temperature (only
PMIRTEMP 11.675 float [deg] Average primary mirror temperature (nit,e
EPOCH 2000.0 float Epoch of observation
EQUINOX 2000.0 float Equinox of selected coordinate reference frame
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
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)
USEETC T bool ETC data available 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 FOCUS1,FOCUS4,FOCUS6,FOCUS9 str Focus cameras used for this exposure
SKYCAM SKYCAM0,SKYCAM1 str Sky cameras used for this exposure
ADC1PHI None Unknown [deg] ADC 1 angle
USESKY T bool DOS Control: use Sky Monitor
USEFOCUS 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 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
USEGUIDR T bool DOS Control: use guider
USEDONUT T bool DOS Control: use donuts
WCSAXES 2 int
RADESYS FK5 str Coordinate reference frame of major/minor axes
CTYPE1 RA---TAN str
CTYPE2 DEC--TAN str
CD1_1 5.6335e-05 float
CD1_2 1.6773e-05 float
CD2_1 1.8252e-05 float
CD2_2 -5.1774e-05 float
SHAPE 1032,2248 str
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
ADCPHI2 None Unknown
ROI None Unknown
ROIWIDTH None Unknown
GEXPMODE normal str GFA readout mode (loop/normal)
DEVICEID dev07 str GFA device id (serial number)
REQTIME 1860.0 float [s] Requested exposure time
CHECKSUM 4hDA7hAA4hAA4hAA str HDU checksum updated 2022-01-14T11:13:59
DATASUM 1294762993 str data unit checksum updated 2022-01-14T11:13:59
======== ==================================================== ======= ===============================================
Data: FITS image [int16 (compressed), 2248x1032x9]
EXTNAME = FOCUS4T
TODO: description needed
.. collapse:: Required Header Keywords Table
.. rst-class:: keywords
======== ================ ==== ==============================================
KEY Example Value Type Comment
======== ================ ==== ==============================================
NAXIS1 242 int width of table in bytes
NAXIS2 9 int number of rows in table
CHECKSUM RNb1SLa0RLa0RLa0 str HDU checksum updated 2022-01-14T11:13:59
DATASUM 1194419227 str data unit checksum updated 2022-01-14T11:13:59
======== ================ ==== ==============================================
.. rst-class:: columns
| Name | Type | Units | Description |
|---|---|---|---|
| EXPTIME | float64 | TODO: description needed | |
| REQTIME | float64 | TODO: description needed | |
| NIGHT | int64 | TODO: description needed | |
| DATE-OBS | char[*] | TODO: description needed | |
| TIME-OBS | char[*] | TODO: description needed | |
| MJD-OBS | float64 | TODO: description needed | |
| OPENSHUT | char[*] | TODO: description needed | |
| ST | char[*] | TODO: description needed | |
| HEXPOS | char[*] | TODO: description needed | |
| GAMBNTT | float64 | TODO: description needed | |
| GFPGAT | float64 | TODO: description needed | |
| GFILTERT | float64 | TODO: description needed | |
| GCOLDTEC | float64 | TODO: description needed | |
| GHOTTEC | float64 | TODO: description needed | |
| GCCDTEMP | float64 | TODO: description needed | |
| GCAMTEMP | float64 | TODO: description needed | |
| GHUMID2 | float64 | TODO: description needed | |
| GHUMID3 | float64 | TODO: description needed | |
| CRPIX1 | float64 | TODO: description needed | |
| CRPIX2 | float64 | TODO: description needed | |
| CRVAL1 | float64 | TODO: description needed | |
| CRVAL2 | float64 | TODO: description needed |
EXTNAME = FOCUS1
TODO: description needed
.. collapse:: Required Header Keywords Table
.. rst-class:: keywords
======== ==================================================== ======= ===============================================
KEY Example Value Type Comment
======== ==================================================== ======= ===============================================
NAXIS1 8 int width of table in bytes
NAXIS2 9288 int number of rows in table
ZTILE3 1 int size of tiles to be compressed
BZERO 32768 int offset data range to that of unsigned short
BSCALE 1 int default scaling factor
DEVICE FOCUS1 str Device/controller name
UNIT 1 int Unit number/letter
UNITTYPE FOCUS str Image Sources/Component
EXPID 118526 int Exposure number
FRAMES 9 int Number of Frames in Archive
TILEID 4403 int DESI Tile ID
FIBASSGN /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 2022-01-14T11:03:58.542861 str [UTC] Observation data and start time
MJD-OBS 59593.46109425 float Modified Julian Date of observation
OPENSHUT 2022-01-14T11:03:58.542861 str Time shutter opened
ST 11:14:12.2376 str Local Sidereal time at observation start (HH:MM
FOCSTIME 60.0 float [s] focus GFA exposure time
REQRA 170.239 float [deg] Requested right ascension (observer input
REQDEC -7.093 float [deg] Requested declination (observer input)
DELTARA None Unknown [arcsec] Offset], right ascension, observer inp
DELTADEC None Unknown [arcsec] Offset], declination, observer input
FOCUS 946.6,-231.6,-83.4,-18.3,9.8,139.4 str Telescope focus settings
TRUSTEMP 12.267 float [deg] Average Telescope truss temperature (only
PMIRTEMP 11.675 float [deg] Average primary mirror temperature (nit,e
EPOCH 2000.0 float Epoch of observation
EQUINOX 2000.0 float Equinox of selected coordinate reference frame
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
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)
USEETC T bool ETC data available 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 FOCUS1,FOCUS4,FOCUS6,FOCUS9 str Focus cameras used for this exposure
SKYCAM SKYCAM0,SKYCAM1 str Sky cameras used for this exposure
ADC1PHI None Unknown [deg] ADC 1 angle
USESKY T bool DOS Control: use Sky Monitor
USEFOCUS 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 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
USEGUIDR T bool DOS Control: use guider
USEDONUT T bool DOS Control: use donuts
WCSAXES 2 int
RADESYS FK5 str Coordinate reference frame of major/minor axes
CTYPE1 RA---TAN str
CTYPE2 DEC--TAN str
CD1_1 -3.4711e-05 float
CD1_2 4.4105e-05 float
CD2_1 4.8013e-05 float
CD2_2 3.1893e-05 float
SHAPE 1032,2248 str
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
ADCPHI2 None Unknown
ROI None Unknown
ROIWIDTH None Unknown
GEXPMODE normal str GFA readout mode (loop/normal)
DEVICEID dev05 str GFA device id (serial number)
REQTIME 1860.0 float [s] Requested exposure time
CHECKSUM 4NNh7NNg4NNg4NNg str HDU checksum updated 2022-01-14T11:13:59
DATASUM 3152869116 str data unit checksum updated 2022-01-14T11:13:59
======== ==================================================== ======= ===============================================
Data: FITS image [int16 (compressed), 2248x1032x9]
EXTNAME = FOCUS1T
TODO: description needed
.. collapse:: Required Header Keywords Table
.. rst-class:: keywords
======== ================ ==== ==============================================
KEY Example Value Type Comment
======== ================ ==== ==============================================
NAXIS1 242 int width of table in bytes
NAXIS2 9 int number of rows in table
CHECKSUM jaafmSWfjYafjYUf str HDU checksum updated 2022-01-14T11:13:59
DATASUM 626101938 str data unit checksum updated 2022-01-14T11:13:59
======== ================ ==== ==============================================
.. rst-class:: columns
| Name | Type | Units | Description |
|---|---|---|---|
| EXPTIME | float64 | TODO: description needed | |
| REQTIME | float64 | TODO: description needed | |
| NIGHT | int64 | TODO: description needed | |
| DATE-OBS | char[*] | TODO: description needed | |
| TIME-OBS | char[*] | TODO: description needed | |
| MJD-OBS | float64 | TODO: description needed | |
| OPENSHUT | char[*] | TODO: description needed | |
| ST | char[*] | TODO: description needed | |
| HEXPOS | char[*] | TODO: description needed | |
| GAMBNTT | float64 | TODO: description needed | |
| GFPGAT | float64 | TODO: description needed | |
| GFILTERT | float64 | TODO: description needed | |
| GCOLDTEC | float64 | TODO: description needed | |
| GHOTTEC | float64 | TODO: description needed | |
| GCCDTEMP | float64 | TODO: description needed | |
| GCAMTEMP | float64 | TODO: description needed | |
| GHUMID2 | float64 | TODO: description needed | |
| GHUMID3 | float64 | TODO: description needed | |
| CRPIX1 | float64 | TODO: description needed | |
| CRPIX2 | float64 | TODO: description needed | |
| CRVAL1 | float64 | TODO: description needed | |
| CRVAL2 | float64 | TODO: description needed |
EXTNAME = FOCUS9
TODO: description needed
.. collapse:: Required Header Keywords Table
.. rst-class:: keywords
======== ==================================================== ======= ===============================================
KEY Example Value Type Comment
======== ==================================================== ======= ===============================================
NAXIS1 8 int width of table in bytes
NAXIS2 9288 int number of rows in table
ZTILE3 1 int size of tiles to be compressed
BZERO 32768 int offset data range to that of unsigned short
BSCALE 1 int default scaling factor
DEVICE FOCUS9 str Device/controller name
UNIT 9 int Unit number/letter
UNITTYPE FOCUS str Image Sources/Component
EXPID 118526 int Exposure number
FRAMES 9 int Number of Frames in Archive
TILEID 4403 int DESI Tile ID
FIBASSGN /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 2022-01-14T11:03:58.542861 str [UTC] Observation data and start time
MJD-OBS 59593.46109425 float Modified Julian Date of observation
OPENSHUT 2022-01-14T11:03:58.542861 str Time shutter opened
ST 11:14:12.2376 str Local Sidereal time at observation start (HH:MM
FOCSTIME 60.0 float [s] focus GFA exposure time
REQRA 170.239 float [deg] Requested right ascension (observer input
REQDEC -7.093 float [deg] Requested declination (observer input)
DELTARA None Unknown [arcsec] Offset], right ascension, observer inp
DELTADEC None Unknown [arcsec] Offset], declination, observer input
FOCUS 946.6,-231.6,-83.4,-18.3,9.8,139.4 str Telescope focus settings
TRUSTEMP 12.267 float [deg] Average Telescope truss temperature (only
PMIRTEMP 11.675 float [deg] Average primary mirror temperature (nit,e
EPOCH 2000.0 float Epoch of observation
EQUINOX 2000.0 float Equinox of selected coordinate reference frame
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
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)
USEETC T bool ETC data available 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 FOCUS1,FOCUS4,FOCUS6,FOCUS9 str Focus cameras used for this exposure
SKYCAM SKYCAM0,SKYCAM1 str Sky cameras used for this exposure
ADC1PHI None Unknown [deg] ADC 1 angle
USESKY T bool DOS Control: use Sky Monitor
USEFOCUS 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 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
USEGUIDR T bool DOS Control: use guider
USEDONUT T bool DOS Control: use donuts
WCSAXES 2 int
RADESYS FK5 str Coordinate reference frame of major/minor axes
CTYPE1 RA---TAN str
CTYPE2 DEC--TAN str
CD1_1 -5.6317e-05 float
CD1_2 -1.6905e-05 float
CD2_1 -1.8398e-05 float
CD2_2 5.1751e-05 float
SHAPE 1032,2248 str
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
ADCPHI2 None Unknown
ROI None Unknown
ROIWIDTH None Unknown
GEXPMODE normal str GFA readout mode (loop/normal)
DEVICEID dev03 str GFA device id (serial number)
REQTIME 1860.0 float [s] Requested exposure time
CHECKSUM gjaCgjZBgjaBgjWB str HDU checksum updated 2022-01-14T11:13:59
DATASUM 1001490193 str data unit checksum updated 2022-01-14T11:13:59
======== ==================================================== ======= ===============================================
Data: FITS image [int16 (compressed), 2248x1032x9]
EXTNAME = FOCUS9T
TODO: description needed
.. collapse:: Required Header Keywords Table
.. rst-class:: keywords
======== ================ ==== ==============================================
KEY Example Value Type Comment
======== ================ ==== ==============================================
NAXIS1 242 int width of table in bytes
NAXIS2 9 int number of rows in table
CHECKSUM 79AXA97X79AXA97X str HDU checksum updated 2022-01-14T11:14:00
DATASUM 2395983219 str data unit checksum updated 2022-01-14T11:14:00
======== ================ ==== ==============================================
.. rst-class:: columns
| Name | Type | Units | Description |
|---|---|---|---|
| EXPTIME | float64 | TODO: description needed | |
| REQTIME | float64 | TODO: description needed | |
| NIGHT | int64 | TODO: description needed | |
| DATE-OBS | char[*] | TODO: description needed | |
| TIME-OBS | char[*] | TODO: description needed | |
| MJD-OBS | float64 | TODO: description needed | |
| OPENSHUT | char[*] | TODO: description needed | |
| ST | char[*] | TODO: description needed | |
| HEXPOS | char[*] | TODO: description needed | |
| GAMBNTT | float64 | TODO: description needed | |
| GFPGAT | float64 | TODO: description needed | |
| GFILTERT | float64 | TODO: description needed | |
| GCOLDTEC | float64 | TODO: description needed | |
| GHOTTEC | float64 | TODO: description needed | |
| GCCDTEMP | float64 | TODO: description needed | |
| GCAMTEMP | float64 | TODO: description needed | |
| GHUMID2 | float64 | TODO: description needed | |
| GHUMID3 | float64 | TODO: description needed | |
| CRPIX1 | float64 | TODO: description needed | |
| CRPIX2 | float64 | TODO: description needed | |
| CRVAL1 | float64 | TODO: description needed | |
| CRVAL2 | float64 | TODO: description needed |
EXTNAME = FOCUS6
TODO: description needed
.. collapse:: Required Header Keywords Table
.. rst-class:: keywords
======== ==================================================== ======= ===============================================
KEY Example Value Type Comment
======== ==================================================== ======= ===============================================
NAXIS1 8 int width of table in bytes
NAXIS2 9288 int number of rows in table
ZTILE3 1 int size of tiles to be compressed
BZERO 32768 int offset data range to that of unsigned short
BSCALE 1 int default scaling factor
DEVICE FOCUS6 str Device/controller name
UNIT 6 int Unit number/letter
UNITTYPE FOCUS str Image Sources/Component
EXPID 118526 int Exposure number
FRAMES 9 int Number of Frames in Archive
TILEID 4403 int DESI Tile ID
FIBASSGN /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 2022-01-14T11:03:58.542861 str [UTC] Observation data and start time
MJD-OBS 59593.46109425 float Modified Julian Date of observation
OPENSHUT 2022-01-14T11:03:58.542861 str Time shutter opened
ST 11:14:12.2376 str Local Sidereal time at observation start (HH:MM
FOCSTIME 60.0 float [s] focus GFA exposure time
REQRA 170.239 float [deg] Requested right ascension (observer input
REQDEC -7.093 float [deg] Requested declination (observer input)
DELTARA None Unknown [arcsec] Offset], right ascension, observer inp
DELTADEC None Unknown [arcsec] Offset], declination, observer input
FOCUS 946.6,-231.6,-83.4,-18.3,9.8,139.4 str Telescope focus settings
TRUSTEMP 12.267 float [deg] Average Telescope truss temperature (only
PMIRTEMP 11.675 float [deg] Average primary mirror temperature (nit,e
EPOCH 2000.0 float Epoch of observation
EQUINOX 2000.0 float Equinox of selected coordinate reference frame
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
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)
USEETC T bool ETC data available 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 FOCUS1,FOCUS4,FOCUS6,FOCUS9 str Focus cameras used for this exposure
SKYCAM SKYCAM0,SKYCAM1 str Sky cameras used for this exposure
ADC1PHI None Unknown [deg] ADC 1 angle
USESKY T bool DOS Control: use Sky Monitor
USEFOCUS 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 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
USEGUIDR T bool DOS Control: use guider
USEDONUT T bool DOS Control: use donuts
WCSAXES 2 int
RADESYS FK5 str Coordinate reference frame of major/minor axes
CTYPE1 RA---TAN str
CTYPE2 DEC--TAN str
CD1_1 3.496e-05 float
CD1_2 -4.3929e-05 float
CD2_1 -4.782e-05 float
CD2_2 -3.2123e-05 float
SHAPE 1032,2248 str
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
ADCPHI2 None Unknown
ROI None Unknown
ROIWIDTH None Unknown
GEXPMODE normal str GFA readout mode (loop/normal)
DEVICEID dev13 str GFA device id (serial number)
REQTIME 1860.0 float [s] Requested exposure time
CHECKSUM Uf34ac13Vc13ac13 str HDU checksum updated 2022-01-14T11:14:00
DATASUM 1884870740 str data unit checksum updated 2022-01-14T11:14:00
======== ==================================================== ======= ===============================================
Data: FITS image [int16 (compressed), 2248x1032x9]
EXTNAME = FOCUS6T
TODO: description needed
.. collapse:: Required Header Keywords Table
.. rst-class:: keywords
======== ================ ==== ==============================================
KEY Example Value Type Comment
======== ================ ==== ==============================================
NAXIS1 242 int width of table in bytes
NAXIS2 9 int number of rows in table
CHECKSUM K2DmK0BjK0BjK0Bj str HDU checksum updated 2022-01-14T11:14:00
DATASUM 2998174015 str data unit checksum updated 2022-01-14T11:14:00
======== ================ ==== ==============================================
.. rst-class:: columns
| Name | Type | Units | Description |
|---|---|---|---|
| EXPTIME | float64 | TODO: description needed | |
| REQTIME | float64 | TODO: description needed | |
| NIGHT | int64 | TODO: description needed | |
| DATE-OBS | char[*] | TODO: description needed | |
| TIME-OBS | char[*] | TODO: description needed | |
| MJD-OBS | float64 | TODO: description needed | |
| OPENSHUT | char[*] | TODO: description needed | |
| ST | char[*] | TODO: description needed | |
| HEXPOS | char[*] | TODO: description needed | |
| GAMBNTT | float64 | TODO: description needed | |
| GFPGAT | float64 | TODO: description needed | |
| GFILTERT | float64 | TODO: description needed | |
| GCOLDTEC | float64 | TODO: description needed | |
| GHOTTEC | float64 | TODO: description needed | |
| GCCDTEMP | float64 | TODO: description needed | |
| GCAMTEMP | float64 | TODO: description needed | |
| GHUMID2 | float64 | TODO: description needed | |
| GHUMID3 | float64 | TODO: description needed | |
| CRPIX1 | float64 | TODO: description needed | |
| CRPIX2 | float64 | TODO: description needed | |
| CRVAL1 | float64 | TODO: description needed | |
| CRVAL2 | float64 | TODO: description needed |