Header information
# Note
TriCCSのヘッダーには複数の時刻情報が記載されています。
OBSERVATION SECTIONにある時刻
cont380での時刻情報を参照しています。JSTとUTで0.2秒の時刻差があります。
DATA SECTIONにある時刻
TriCCSはデータ取得するプロセスとして、以下のようになっています。
1. Fits header生成
--> 制御PCそれぞれのマシンタイムが"GMT"として記録
2. 露出開始
(3. Fits header修正)
--> 23A以前のデータについては画像の最初に記録されているGPS時刻を修正し、"GEXP-STR"として記録
--> 23B以降についてはファームウェアが修正されたのでGPS画素で補正済
PROP-IDが"CAL"となっているデータについては、SMOKAで(基本的には)即時公開されます。
一晩で取られた全データが512GB以上の時は、時間がかかります。
それぞれのCMOS制御PCから望遠鏡のステータスを参照するため、同時に読み出した画像であっても
ヘッダーに記録されている座標情報などでは若干のズレがでます。
# Exsample of FITS Header
SIMPLE = T / FITS standard
BITPIX = 16 / bit per pixel
NAXIS = 3 / number of axes
NAXIS1 = 2220 / size of the axis1
NAXIS2 = 1360 / size of the axis2
NAXIS3 = 10 / size of the axis3
EXTEND = F
BZERO = 8192 / data zero
BSCALE = 0.25 / data scale
COMMENT ------------- OBSERVATION SECTION
DATE-OBS= '2023-05-18' / Observation start date (yyyy-mm-dd)
JST-STR = '15:24:20.80' / JST at exposure start (HH:MM:SS.SS)
JST-END = '15:24:30.60' / JST at exposure end (HH:MM:SS.SS)
UT-STR = '06:24:20.60' / UT at exposure start (HH:MM:SS.SS)
UT-END = '06:24:30.40' / UT at exposure end (HH:MM:SS.SS)
LST-STR = '07:01:28.70' / LST at exposure start (HH:MM:SS.SS)
LST-END = '07:01:38.50' / LST at exposure end (HH:MM:SS.SS)
MJD-STR = 60082.2669051 / MJD at exposure start
MJD-END = 60082.2670185 / MJD at exposure end
TIMESYS = 'UTC ' / Time system used in the header
DATA-TYP= 'DARK ' / Type / characteristics of this data
RA = '06:57:34.8' / RA of telescope pointing (HH:MM:SS.S)
DEC = '-05:43:15.6' / DEC of telescope pointing (+/-DD:MM:SS.S)
PA = 180.0 / position angle (degree)
OBJECT = 'DARK ' / Target description
OBJ-RA = '00:00:00.00' / RA of target (HH:MM:SS.SS)
OBJ-DEC = '+00:00:00.00' / DEC of target (+/-DD:MM:SS.SS)
RADESYS = 'FK5 ' / Equatorial coordinate system
EQUINOX = 2000.0 / Standard FK5 (years)
HA-STR = '+00:03:53.9' / Hour angle at exposure start (+/-HH:MM:SS.S)
HA-END = '+00:03:53.9' / Hour angle at exposure end (+/-HH:MM:SS.S)
ZD-STR = 39.999889 / Zenith distance at exposure start (degree)
ZD-END = 39.999889 / Zenith distance at exposure end (degree)
SECZ-STR= 1.30541 / sec(zenith distance) at exposure start
SECZ-END= 1.30541 / sec(zenith distance) at exposure end
ALT-STR = 50.000111 / Altitude angle at exposure start (degree)
ALT-END = 50.000111 / Altitude angle at exposure end (degree)
AZ-STR = 181.0 / Azimuth angle at exposure start (degree)
AZ-END = 181.0 / Azimuth angle at exposure end (degree)
FOC-VAL = -0.656 / Encoder value of the focus unit
M3-STR = 178.091472 / Telescope M3 angle at exposure start (degree)
M3-END = 178.091472 / Telescope M3 angle at exposure end (degree)
INR1-STR= 0.0 / Instrument rotator1 angle at exp. start (deg)
INR1-END= 0.0 / Instrument rotator1 angle at exp. end (deg)
INR2-STR= 0.0025 / Instrument rotator2 angle at exp. start (deg)
INR2-END= 0.0025 / Instrument rotator2 angle at exp. end (deg)
INR2-TAS= 0.0 / Inst. rotator2 target angle at exp. start (deg)
INR2-TAE= 0.0 / Inst. rotator2 target angle at exp. end (deg)
INR2-VES= 0.0 / Inst. rotator2 velocity at exp. start (deg/s)
INR2-VEE= 0.0 / Inst. rotator2 velocity at exp. end (deg/s)
INR2-OFS= 0.0 / Inst. rotator2 offset at exp. start (deg)
INR2-OFE= 0.0 / Inst. rotator2 offset at exp. end (deg)
INR2-MOD= 'UNKNOWN ' / Instrument rotator2 tracking mode
DOM-PSTR= 179.6 / Dome position at exposure start (degree)
DOM-PEND= 179.6 / Dome position at exposure end (degree)
DOM-SSTR= 'Closed ' / Dome slit status at exposure start
DOM-SEND= 'Closed ' / Dome slit status at exposure end
DOME-LT = 'ON ' / Dome light status
ROT-XCPS= 20.0 / Offset guider X-axis pos. at exp. start (mm)
ROT-XCPE= 20.0 / Offset guider X-axis pos. at exp. end (mm)
ROT-YCPS= 25.0 / Offset guider Y-axis pos. at exp. start (mm)
ROT-YCPE= 25.0 / Offset guider Y-axis pos. at exp. end (mm)
ROT-ZCPS= 20.0 / Offset guider Z-axis pos. at exp. start (mm)
ROT-ZCPE= 20.0 / Offset guider Z-axis pos. at exp. end (mm)
ROT-XTPS= 20.0 / Offset guider X target pos. at exp. start (mm)
ROT-XTPE= 20.0 / Offset guider X target pos. at exp. end (mm)
ROT-YTPS= 25.0 / Offset guider Y target pos. at exp. start (mm)
ROT-YTPE= 25.0 / Offset guider Y target pos. at exp. end (mm)
ROT-ZTPS= 20.0 / Offset guider Z target pos. at exp. start (mm)
ROT-ZTPE= 20.0 / Offset guider Z target pos. at exp. end (mm)
ROT-XSVO= 1 / Offset guider X-axis servo status (OFF=0,ON=1)
ROT-YSVO= 1 / Offset guider Y-axis servo status (OFF=0,ON=1)
ROT-ZSVO= 1 / Offset guider Z-axis servo status (OFF=0,ON=1)
ROT-XORG= 1 / Offset guider X-axis origin (OFF=0,ON=1)
ROT-YORG= 1 / Offset guider Y-axis origin (OFF=0,ON=1)
ROT-ZORG= 1 / Offset guider Z-axis origin (OFF=0,ON=1)
ROT-SILP= 175.0 / Small inst. linear stage current position (mm)
ROT-SILS= 1 / Small inst. linear stage servo status (ON=1)
ROT-SILO= 1 / Small inst. linear stage origin (OFF=0,ON=1)
ROT-SIRA= 72405 / Small inst. mirror current angle (pulse)
ROT-SIRO= 1 / Small inst. mirror rotation origin (ON=1)
ROT-APOS= 1.0 / Fiber stage A current position (mm)
ROT-BPOS= 123.35 / Fiber stage B current position (mm)
ROT-ASVO= 1 / Fiber stage A servo status (OFF=0,ON=1)
ROT-BSVO= 1 / Fiber stage B servo status (OFF=0,ON=1)
ROT-AORG= 1 / Fiber stage A origin (OFF=0,ON=1)
ROT-BORG= 1 / Fiber stage B origin (OFF=0,ON=1)
LAMP-HG = 0 / Hg lamp status (OFF=0,ON=1)
LAMP-NE = 0 / Ne lamp status (OFF=0,ON=1)
LAMP-XE = 0 / Xe lamp status (OFF=0,ON=1)
LAMP-FLT= 0 / Flat lamp status (OFF=0,ON=1)
COMMENT ------------- WEATHER SECTION
WEA-TSTR= '2023-05-18T15:22' / Updated time of weather sensors at exp. start
WEA-TEND= '2023-05-18T15:22' / Updated time of weather sensors at exp. end
DOM-TSTR= 24.4 / Temp. in the dome at exp. start (C)
DOM-TEND= 24.4 / Temp. in the dome at exp. end (C)
DOM-HSTR= 62.2 / Humidity in the dome at exp. start (%)
DOM-HEND= 62.2 / Humidity in the dome at exp. end (%)
DOM-WSTR= 'Fine ' / Status of the dome wet senser at exp. start
DOM-WEND= 'Fine ' / Status of the dome wet senser at exp. end
OUT-TSTR= 19.9 / Outside temperture at exp. start (C)
OUT-TEND= 19.9 / Outside temperture at exp. end (C)
OUT-HSTR= 80.0 / Outside humidity at exp. start (%)
OUT-HEND= 80.0 / Outside humidity at exp. end (%)
OUT-PSTR= 975.8 / Outside atm. pressure at exp. start (hPa)
OUT-PEND= 975.8 / Outside atm. pressure at exp. end (hPa)
OUT-WSTR= 2.5 / Outside wind velocity at exp. start (m/s)
OUT-WEND= 2.5 / Outside wind velocity at exp. end (m/s)
OUT-WDIS= 218.9 / Outside wind direction at exp. start (deg)
OUT-WDIE= 218.9 / Outside wind direction at exp. end (deg)
COMMENT ------------- OBSERVATORY SECTION
OBSERVAT= 'Kyoto U., Okayama' / Observatory
TELESCOP= 'Seimei Telescope' / Telescope / system which Inst. is attached
INSTRUME= 'TriCCS ' / Name of instrument
OBSERVER= 'public ' / Name(s) of observer(s)
PROP-ID = 'CAL ' / Proposal ID
DAT-PUB = 'Open ' / Public data
OBS-MOD = 'Imaging ' / Observation mode
COMMENT ------------- DATA SECTION
EXPID = 25161 / Frame sequential number
DETID = 0 / CMOS detector ID number
CMOSID = 'FK5000028' / CMOS serial ID number
FRAMEID = 'TRCS00251610' / FITS file unique ID
BUNIT = 'ADU ' / Unit of original pixel values
GMT = '2023-05-18T06:24:20.848140' / Fits creation time in UT
GEXP-STR= '2023-05-18T06:24:21.515272' / GPS time at exposure start
EXPTIME = 9.96464 / Total exposure time (s)
TELAPSE = 9.96464 / Elapsed time (s)
EXPTIME1= 0.996464 / Exposure time per frame (s)
TFRAME = 0.996464 / Time interval between frames (s)
DAT-FPS = 1.003549 / Data frame rate (Hz)
FILTDISP= 'orig ' / Filter or grism name
COMMENT ------------- INSTRUMENT SECTION
GAINCNFG= 'x8 ' / Sensor gain setting
GAIN = 0.76 / Sensor inverse gain (electron/ADU)
RDNOISE = 4.0 / Typical readout noise (electron)
H_FLIP = 0 / Flip horizontal
V_FLIP = 1 / Flip vertical
EFP-MIN1= 61 / Start X pos. of effective area (pix)
EFP-MIN2= 1 / Start Y pos. of effective area (pix)
EFP-RNG1= 2160 / X range of effective area (pix)
EFP-RNG2= 1280 / Y range of effective area (pix)
RESTART = 0 / Grab restarted count
PLS-SHUT= -4000 / Position of shutter (pulse)
POS-SHUT= 'close ' / Position name of shutter
PLS-COL = 0 / Position of collimator (pulse)
POS-COL = 'orig ' / Position name of collimator
PLS-ARMA= 0 / Position of arm A (pulse)
POS-ARMA= 'orig ' / Position name of arm A
PLS-ARMB= 0 / Position of arm B (pulse)
POS-ARMB= 'PS1-r2 ' / Position name of arm B
PLS-ARMC= 0 / Position of arm C (pulse)
POS-ARMC= 'PS1-i2 ' / Position name of arm C
PLS-SLPO= 0 / Position of slit (pulse)
POS-SLPO= 'orig ' / Position name of slit
PLS-SLFO= 0 / Position of slit focus (pulse)
POS-SLFO= 'home ' / Position name of slit focus
PLS-VIPO= 0 / Position of slit viewer (pulse)
POS-VIPO= 'home ' / Position name of slit viewer
PLS-VIFO= 0 / Position of slit viewer focus (pulse)
POS-VIFO= 'home ' / Position name of slit viewer focus
COMMENT ======== DeviceControl
DEVICES1= 2 / Device SFNC Version Minor
DEVICES2= 2 / Device SFNC Version Major
DEVICES3= 0 / Device SFNC Version Sub Minor
DEVICET1= 'Transmitter' / Device Type
DEVICET2= 'CoaXPress' / Device TL Type
DEVICES4= 'Areascan' / Device Scan Type
DEVICEV1= 'Canon Inc.' / Device Vendor Name
DEVICEF1= '35MMFHDXS' / Device Family Name
DEVICEM1= '35MMFHDXSMA' / Device Model Name
DEVICEM2= 'Jul 16 2019 10:04:38 (SVN:0132)' / Device Manufacturer Info
DEVICEV2= 'K1.2.005' / Device Version
DEVICEF2= 'K1.2.D07' / Device Firmware Version
DEVICES5= 30490827 / Device Serial Number
SENSORID= 'FK5000028' / Image Sensor ID
DFEBOAR1= '0xf0 ' / Digital Front End Board Info.
IMBOARD1= 0 / Image Sensor Board Info.
DEVICEU1= 'nop ' / Device User ID
DEVICEI1= 'Active ' / Device Indicator Mode
COOLING1= 'Off ' / Cooling Power
FPGATEM1= 38.635 / FPGA Temperature
DEVBODT1= 22.5 / Device Body Temperature
FAN1SPE1= 0 / Rotation Speed of FAN1 [RPM]
FAN2SPE1= 0 / Rotation Speed of FAN2 [RPM]
SYSSTAT1= '0x800 ' / System status
COMMENT ======== AcquisitionControl
TRIGGER1= 'Off ' / Trigger Mode
ACQUISI1= 'Continuous' / Acquisition Mode
TRIGGER2= 'AcquisitionStart' / Trigger Selector
EXPOSUR1= 'Off ' / Exposure Mode
FRAMEIN1= 97 / Frame Interval
SHUTTER1= 1 / Shutter Speed (1/x)
ACQUISI2= 'AcquisitionTriggerWait' / Acquisition Status Selector
ACQUISI3= 0 / Acquisition Status
COMMENT ======== ImageFormatControl
WIDTH = 2220 / Width
HEIGHT = 1360 / Height
VSCANEND= 'VS_FixedEnd' / VD End mode
VSCANMO1= 'VS_Full ' / Vertical Scan mode
HDPERIOD= 628 / Sensor 1H cycle
VDPERIOD= 340 / Row number of 1V
FRAMERA1= 0.99643 / Frame Rate (spf)
SENSORC1= 'None ' / Sensor Color Filter
IMAGE1S1= 0 / Image1StreamID
PIXELFO1= 'Mono16 ' / Pixel Format
TESTPAT1= 'Off ' / Test Pattern
SENSORG1= 'GainX8 ' / Sensor Gain
OFFSET = 0 / Black Level
COMMENT ======== EFLensControl
EFLENSS1= 'Lens Status' / Lens Status
EFLENSF1= 'Focus Control' / Focus Control
EFLENSF2= 'Iris Control' / Iris Control
COMMENT ======== GPSInfo
GPSINFO1= 'GPSInfoEmbedded' / GPS Information
GPSINST1= 1 / GPS Installed Flag
GPSPOSV1= 1 / GPS Position Valid Flag
GPSPPSD1= 1 / GPS PPS Detect Flag
GPSTIME1= 'GPSTimerSynced' / GPS Timer Mode
GPSTIME2= 1 / GPS Time Valid Flag
GPSLSVA1= 1 / GPS Leap Second Valid Flag
GPSFIXM1= 'GPSFix3D' / GPS Fix Mode
GPSUTCD1= 20230518 / GPS UTC Date (YYYYMMDD)
GPSUTCT1= 62416 / GPS UTC Time (HHMMSS)
GPSWEEK = 2262 / GPS Week
GPSSECO1= 368674 / GPS Second
GPSLEAP1= 18 / GPS Leap Second
GPSLATI1= 34.5769 / Latitude (Deg.)
GPSLONG1= 133.597 / Longitude (Deg.)
GPSSATE1= 0 / Satellite Information Selector
COMMENT ======== TransportLayerControl
DEVICET3= 'Geometry_1X_1Y' / Device Tap Geometry
COAXPRE1= 'CoaXPress' / CoaXPress
COMMENT ======== FactoryControl
FACTORY1= 'FacModeNormal' / Factory Mode
COMMENT ======== Peltier
PELTGT = 10.0 / Peltier target temperature (C)
PELMAIN = 10.02 / Peltier main sensor temperature (C)
PELSUB = 29.3 / Peltier sub sensor temperature (C)
PELSTAT = 'RUN ' / Peltier control status
PELCTL = 'COOL ' / Peltier control mode
PELOPE = 'CONT ' / Peltier operation mode
COMMENT ======== IMAGE MANIPULAION
DEBIAS = F / Auto debias
TRIMMING= F / Auto image trimming
COMMENT ------------- WCS SECTION
CRVAL1 = 104.395 / Physical value of the reference pixel X
CRVAL2 = -5.721 / Physical value of the reference pixel Y
CRVAL3 = 0 / Physical value of the reference pixel Z
CRPIX1 = 1105 / Reference pixel in X (pixel)
CRPIX2 = 648 / Reference pixel in Y (pixel)
CRPIX3 = 1 / Reference pixel in Z (pixel)
CTYPE1 = 'RA---TAN' / Pixel coordinate system
CTYPE2 = 'DEC--TAN' / Pixel coordinate system
CTYPE3 = 'TIME ' / Pixel coordinate system
CUNIT1 = 'deg ' / Units used in both CRVAL1 and CDELT1
CUNIT2 = 'deg ' / Units used in both CRVAL2 and CDELT2
CUNIT3 = 's ' / Units used in both CRVAL3 and CDELT3
CD1_1 = -9.72E-05 / Pixel Coordinate translation matrix
CD1_2 = 1.19E-20 / Pixel Coordinate translation matrix
CD1_3 = 0 / Pixel Coordinate translation matrix
CD2_1 = 1.19E-20 / Pixel Coordinate translation matrix
CD2_2 = 9.72E-05 / Pixel Coordinate translation matrix
CD2_3 = 0 / Pixel Coordinate translation matrix
CD3_1 = 0 / Pixel Coordinate translation matrix
CD3_2 = 0 / Pixel Coordinate translation matrix
CD3_3 = 0.996464 / Pixel Coordinate translation matrix
LONPOLE = 180.0 / Native longitude of celestial pole (deg)
LATPOLE = 0.0 / Native latitude of celestial pole (deg)
WCSVALID= F
END