Name: idR-rrrrrr-rc-ffff.fit, where rrrrrr is the imaging run number, r is the camera row (filter) location in the Imaging array (123456789=riuzgolts), c is the column location in the Imaging Array of the CCD which acquired the data (1-6), and ffff is the field number within the run.
Produced by: iop
Used by: bias, ssc, frames
Size: 5,800.32 Kb per file. Total of 174,009.6 Mb for all 30 photometric chips of a run with 1000 fields.
Archived? Yes. Tracked file.
SIMPLE = F
BITPIX = -16
NAXIS = 2
NAXIS1 = 2128
NAXIS2 = 1361
BUNITS = 'ADUs '
SDSS / This contains an SDSS extension
UNSIGNED / This is an SDSS unsigned 16-bit integer image
ORIGIN = 'SDSS '
TELESCOP= '2.5m '
OBSERVER= 'XXX '
RUN = XXX / Imaging run number
COMMENT arFlavor enum: SCIENCE, CALIBRATION, TEST, IGNORE
FLAVOR = 'XXX ' / Flavor of this run
COMMENT arGCSystem enum: MEAN, APPARENT
SYS_SCN = 'XXX' / System of the scan great circle (e.g., mean)
EQNX_SCN= XXXX.XX / Equinox of the scan great circle. (years)
NODE = XXX.XXXXX / RA of the great circle's ascending node (deg)
INCL = XXX.XXXXX / Great circle's inclination wrt cel. eq. (deg)
XBORE = XXX.XX / Boresight x offset from the array center (mm)
YBORE = XXX.XX / Boresight y offset from the array center (mm)
COMMENT arGCSystem enum: MEAN, APPARENT
SYSTEM = 'XXX ' / System of the TCC coordinates (e.g., mean)
EQUINOX = XXXX.XX / Equinox of the TCC coordinates (years)
C_OBS = XXX.X / CCD row clock rate (usec/row)
COLBIN = XXX / Binning factor perpendicular to the columns
ROWBIN = XXX / Binning factor perpendicular to the rows
COMMENT arStrip enum: N or S
STRIP = 'XXX ' / Strip in the stripe being tracked.
STRIPE = XX / Stripe index number (23 <--> eta=0)
FRAME = XXX / Frame sequence number within the run
FIELD = XXX / Field sequence number within the run
CAMCOL = XXX / Column in the imaging camera
COMMENT The following parameters are for when column 0 of row 0 was read
TAI = XXXXXXXXXX.XX / Number of seconds since Nov 17 1858 0 TAI
RA = XXX.XXXXXX / Right ascension of telescope boresight (deg)
DEC = XXX.XXXXXX / Declination of telescope boresight (degrees)
SPA = XXX.XXX / Camera col position angle wrt north (degrees)
IPA = XXX.XXX / Instrument rotator position angle (degrees)
IPARATE = XXX.XXXX / Instrument rotator angular velocity (deg/sec)
AZ = XXX.XXXXXX / Azimuth (encoder) of tele (0=N?) (degrees)
ALT = XXX.XXXXXX / Altitude(encoder) of tele (degrees)
FOCUS = XXXXX.X / Focus piston (microns?)
COMMENT
VERSION = 'XXX ' / Version of DA software
CCDMODE = 'XXX ' / 'STARING' or 'DRIFT'
DATE-OBS= 'DD/MM/YY' / TAI date (DD/MM/YY)
TAIHMS = 'HH:MM:SS.SS' / TAI time (HH:MM:SS.SS) (TAI-UT =approx 30 s)
OBJECT = 'XXX ' / e.g., 'stripe 50.6 degrees, north strip'
EXPTIME = XXX.XX / Exposure time (seconds)
NLINES = 1361 / Number of lines in a frame
COMMENT CCD-specific parameters
FILTER = 'X ' / Filter ('u', 'g', 'r', 'i', 'z', 'l', or 't')
CAMROW = XXX / Row in the imaging camera
CCDLOC = XXX / Survey location of CCD (e.g., rowCol)
BADLINES= 0 / Number of bad lines in frame
AMPL = X / which amp 0,1,2,3 corresponds to low pix
AMPR = X / which amp 0,1,2,3 corresponds to high pix
CCDSECL = '[XXX:XXX,XXX:XXX]' / Physical ccd section for low pixels
DATASECL= '[XXX:XXX,XXX:XXX]' / Image section for data for low pixels
BIASSECL= '[XXX:XXX,XXX:XXX]' / Image section for prescan for low pix
OVERSECL= '[XXX:XXX,XXX:XXX]' / Image section for overscan for low pix
CCDSECR = '[XXX:XXX,XXX:XXX]' / Physical ccd section for high pixels
DATASECR= '[XXX:XXX,XXX:XXX]' / Image section for data for high pixels
BIASSECR= '[XXX:XXX,XXX:XXX]' / Image section for prescan for high pixels
OVERSECR= '[XXX:XXX,XXX:XXX]' / Image section for overscan for high pixels
END