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SIMPLE = T / file does conform to FITS standard
BITPIX = 8 / number of bits per data pixel
NAXIS = 0 / number of data axes
EXTEND = T / FITS dataset may contain extensions
COMMENT FITS (Flexible Image Transport System) format defined in Astronomy and
COMMENT Astrophysics Supplement Series v44/p363, v44/p371, v73/p359, v73/p365.
COMMENT Contact the NASA Science Office of Standards and Technology for the
COMMENT FITS Definition document #100 and other FITS information.
COMMENT
HDRVER = '4.3 ' / Header version
FITSTYPE= 'PSRFITS' / FITS definition for pulsar data files
DATE = ' ' / File creation date (YYYY-MM-DDThh:mm:ss UTC)
GITHASH = ' ' / GIT hash for the wapp2psrfits code used
OBSERVER= ' ' / Observer name(s)
PROJID = ' ' / Project name
TELESCOP= 'Arecibo' / Telescope name
ANT_X = 2390490.0 / [m] Antenna ITRF X-coordinate (D)
ANT_Y = -5564764.0 / [m] Antenna ITRF Y-coordinate (D)
ANT_Z = 1994727.0 / [m] Antenna ITRF Z-coordinate (D)
FRONTEND= ' ' / Rx and feed ID
IBEAM = * / Beam number for multibeam systems (0=ctr beam)
NRCVR = 2 / Number of receiver polarisation channels
FD_POLN = 'LIN' / LIN or CIRC
FD_HAND = -1 / +/- 1. +1 is LIN:A=X,B=Y, CIRC:A=L,B=R (I)
FD_SANG = 45.0 / [deg] FA of E vect for equal sig in A&B (E)
FD_XYPH = 0.0 / [deg] Phase of A^* B for injected cal (E)
BACKEND = 'WAPP' / Backend ID
BECONFIG= 'N/A' / Backend configuration file name
BE_PHASE= -1 / 0/+1/-1 BE cross-phase:0 unknown,+/-1 std/rev
BE_DCC = 0 / 0/1 BE downconversion conjugation corrected
BE_DELAY= 0.0 / [s] Backend propn delay from digitiser input
TCYCLE = 0.0 / [s] On-line cycle time (D)
OBS_MODE= 'SEARCH' / (PSR, CAL, SEARCH)
DATE-OBS= ' ' / Date of observation (YYYY-MM-DDThh:mm:ss UTC)
OBSFREQ = * / [MHz] Centre frequency for observation
OBSBW = * / [MHz] Bandwidth for observation
OBSNCHAN= * / Number of frequency channels (original)
CHAN_DM = 0.0 / DM used to de-disperse each channel (pc/cm^3)
PNT_ID = ' ' / Name or ID for pointing ctr (multibeam feeds)
SRC_NAME= ' ' / Source or scan ID
COORD_MD= 'J2000' / Coordinate mode (J2000, GAL, ECLIP, etc.)
EQUINOX = 2000.0 / Equinox of coords (e.g. 2000.0)
RA = ' ' / Right ascension (hh:mm:ss.ssss)
DEC = ' ' / Declination (-dd:mm:ss.sss)
BMAJ = * / [deg] Beam major axis length
BMIN = * / [deg] Beam minor axis length
BPA = 0.0 / [deg] Beam position angle
STT_CRD1= ' ' / Start coord 1 (hh:mm:ss.sss or ddd.ddd)
STT_CRD2= ' ' / Start coord 2 (-dd:mm:ss.sss or -dd.ddd)
TRK_MODE= 'TRACK' / Track mode (TRACK, SCANGC, SCANLAT)
STP_CRD1= ' ' / Stop coord 1 (hh:mm:ss.sss or ddd.ddd)
STP_CRD2= ' ' / Stop coord 2 (-dd:mm:ss.sss or -dd.ddd)
SCANLEN = * / [s] Requested scan length (E)
FD_MODE = 'FA' / Feed track mode - FA, CPA, SPA, TPA
FA_REQ = 0.0 / [deg] Feed/Posn angle requested (E)
CAL_MODE= 'OFF' / Cal mode (OFF, SYNC, EXT1, EXT2)
CAL_FREQ= 0.0 / [Hz] Cal modulation frequency (E)
CAL_DCYC= 0.0 / Cal duty cycle (E)
CAL_PHS = 0.0 / Cal phase (wrt start time) (E)
STT_IMJD= * / Start MJD (UTC days) (J - long integer)
STT_SMJD= * / [s] Start time (sec past UTC 00h) (J)
STT_OFFS= * / [s] Start time offset (D)
STT_LST = * / [s] Start LST (D)
END
#
###############################################################################
#
# Subintegration data Binary Table Extension
#
###############################################################################
#
XTENSION= BINTABLE / ***** Subintegration data *****
BITPIX = 8 / N/A
NAXIS = 2 / 2-dimensional binary table
NAXIS1 = * / width of table in bytes
NAXIS2 = * / Number of rows in table (NSUBINT)
PCOUNT = 0 / size of special data area
GCOUNT = 1 / one data group (required keyword)
TFIELDS = * / Number of fields per row
INT_TYPE= 'TIME' / Time axis (TIME, BINPHSPERI, BINLNGASC, etc)
INT_UNIT= 'SEC' / Unit of time axis (SEC, PHS (0-1), DEG)
SCALE = 'FluxDen' / Intensity units (FluxDen/RefFlux/Jansky)
NPOL = 1 / Nr of polarisations
POL_TYPE= 'AA+BB' / Polarisation identifier (e.g., AABBCRCI, AA+BB)
TBIN = * / [s] Time per bin or sample
NBIN = 1 / Nr of bins (PSR/CAL mode; else 1)
NBIN_PRD= 0 / Nr of bins/pulse period (for gated data)
PHS_OFFS= 0.0 / Phase offset of bin 0 for gated data
NBITS = 4 / Nr of bits/datum (SEARCH mode 'X' data, else 1)
ZERO_OFF= 0 / Zero offset for SEARCH-mode 'X' data
NSUBOFFS= 0 / Subint offset (Contiguous SEARCH-mode files)
NCHAN = * / Number of channels/sub-bands in this file
CHAN_BW = * / [MHz] Channel/sub-band width
DM = 0.0 / [cm-3 pc] DM for post-detection dedisperion
RM = 0.0 / [rad m-2] RM for post-detection deFaraday
NCHNOFFS= 0 / Channel/sub-band offset for split files
NSBLK = * / Samples/row (SEARCH mode, else 1)
EXTNAME = SUBINT / name of this binary table extension
TTYPE# = TSUBINT / Length of subintegration
TFORM# = 1D / Double
TUNIT# = s / Units of field
TTYPE# = OFFS_SUB / Offset from Start of subint centre
TFORM# = 1D / Double
TUNIT# = s / Units of field
TTYPE# = LST_SUB / LST at subint centre
TFORM# = 1D / Double
TUNIT# = s / Units of field
TTYPE# = RA_SUB / RA (J2000) at subint centre
TFORM# = 1D / Double
TUNIT# = deg / Units of field
TTYPE# = DEC_SUB / Dec (J2000) at subint centre
TFORM# = 1D / Double
TUNIT# = deg / Units of field
TTYPE# = GLON_SUB / [deg] Gal longitude at subint centre
TFORM# = 1D / Double
TUNIT# = deg / Units of field
TTYPE# = GLAT_SUB / [deg] Gal latitude at subint centre
TFORM# = 1D / Double
TUNIT# = deg / Units of field
TTYPE# = FD_ANG / [deg] Feed angle at subint centre
TFORM# = 1E / Float
TUNIT# = deg / Units of field
TTYPE# = POS_ANG / [deg] Position angle of feed at subint centre
TFORM# = 1E / Float
TUNIT# = deg / Units of field
TTYPE# = PAR_ANG / [deg] Parallactic angle at subint centre
TFORM# = 1E / Float
TUNIT# = deg / Units of field
TTYPE# = TEL_AZ / [deg] Telescope azimuth at subint centre
TFORM# = 1E / Float
TUNIT# = deg / Units of field
TTYPE# = TEL_ZEN / [deg] Telescope zenith angle at subint centre
TFORM# = 1E / Float
TUNIT# = deg / Units of field
TTYPE# = DAT_FREQ / [MHz] Centre frequency for each channel
TFORM# = E / NCHAN floats
TUNIT# = MHz / Units of field
TTYPE# = DAT_WTS / Weights for each channel
TFORM# = E / NCHAN floats
TTYPE# = DAT_OFFS / Data offset for each channel
TFORM# = E / NCHAN*NPOL floats
TTYPE# = DAT_SCL / Data scale factor for each channel
TFORM# = E / NCHAN*NPOL floats
TTYPE# = DATA / Subint data table
TDIM# = (*,*,*,*) / Dimensions (NBITS or NBIN,NCHAN,NPOL,NSBLK)
TFORM# = B / NBIN*NCHAN*NPOL*NSBLK int, byte(B) or bit(X)
TUNIT# = Jy / Units of subint data
END
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