FIRAS Explanatory Supplement Appendix G

                  Concatenated Primary and Extension Headers
                         for FIRAS FITS Format Files

This Appendix contains concatenated primary and extension headers for the
following FIRAS FITS format files:

	Coadded Calibration Interferograms
	Coadded Sky Interferograms
	Calibrated Calibration Spectra
	Calibrated Sky Spectra
	Differential Calibration Spectra
	Differential Sky Spectra
	Destriped Sky Spectra
        Coadd-Based Zodiacal Light Model
        Pixel-Based Zodiacal Light Model
        DIRBE Gradient Kernel
        Physical Stripes
        Orthogonal Stripes
        C Vector
        A Vector
        Covariance Matrix
        Chi-Squared
	Calibration Model Solution
	Calibration Errors
	Combined Calibration Errors
	Model Selection Errors
	Low Frequency Line Profiles
	High Frequency Line Profiles
	Low Frequency Line Map
	High Frequency Line Map
	Dust Spectrum Map
	CMBR Temperature Map

While the number of channels and scan modes varies for each dataset, the header
for only one channel and scan mode in each dataset is included in this
Appendix.

--------------------------------------------------------------------------------

	Coadded Calibration Interferograms

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'CAL-IFG'            / Coadded calibration interferograms
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LLSS'               / Channel and mirror transport mechanism scan
COMMENT                        / mode identifier.  The first two characters
COMMENT                        / indicate the channel, the first being the
COMMENT                        / instrument side: right (R) or left (L); and
COMMENT                        / the second being the frequency: high (H) or
COMMENT                        / low (L).  The third and fourth characters
COMMENT                        / indicate the scan mode, the third being the
COMMENT                        / scan length: short (S) or long (L); and the
COMMENT                        / fourth being the scan speed: slow (S) or 
COMMENT                        / fast (F).  In addition, the scan mode may
COMMENT                        / take the following values for low frequency
COMMENT                        / data only (channel = RL or LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial variance
COMMENT                        / point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between variance 
COMMENT                        / points in GHz
NUM_FREQ=                   43 / Number of frequency points in variance
COMMENT                        / with good data
PEAK_POS=                  360 / Interferogram peak position
FFT_LENGTH=                640 / Length of Fast Fourier Transform used
END
COMMENT
TIMVERSN= 'OGIP/93-003'        / OGIP memo number where the convention
COMMENT                        / is described      
COMMENT    The times reported in this file are atomic seconds elapsed
COMMENT    since 00:00:00 UTC, 1 January 1981.  Time information is
COMMENT    recorded in a manner consistent with the convention specified
COMMENT    in OGIP/93-003 with the understanding that time is counted
COMMENT    in atomic seconds and the origin of time (MJDREF) is quoted
COMMENT    in ephemeris MJD.
TIMESYS = '1981.00'      / time system (same as IRAS)
MJDREFI =         44605  / Integer portion of ephemeris MJD
COMMENT                  / corresponding to 0h UTC 1 Jan 1981
MJDREFF = 0.00059240741  / Fractional portion of ephemeris MJD
COMMENT                  / corresponding to 0h UTC 1 Jan 1981
TIMEUNIT= 's      '      / unit for TSTART, TSTOP, TIMEZERO = seconds
TSTART  = 280713605.000  / observation start time in TIMESYS system
TSTOP   = 306806405.990  / observation stop time in TIMESYS system
COMMENT 
COMMENT 
COMMENT  FIRAS Coadded Interferogram
COMMENT  Project Dataset Record Structure 
COMMENT 
COMMENT 
COMMENT  Instrument Attitude Information
COMMENT 
COMMENT  FIRAS pixel number (resolution 6)
TFORM1='1J'
TTYPE1='PIXEL' / entire fieldname = PIXEL
OFFSET1=0
TUNIT1=' '
COMMENT  Galactic longitude, in deg (0 -> 360)
TFORM2='1E'
TTYPE2='GAL_LON' / entire fieldname = GAL_LON
OFFSET2=4
TUNIT2='deg'
COMMENT  Galactic latitude, in deg (-90 -> +90)
TFORM3='1E'
TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT
OFFSET3=8
TUNIT3='deg'
COMMENT  Ecliptic longitude, epoch 2000.0, in deg (0 -> 360)
TFORM4='1E'
TTYPE4='ECL_LON' / entire fieldname = ECL_LON
OFFSET4=12
TUNIT4='deg'
COMMENT  Ecliptic latitude, epoch 2000.0, in deg (-90 -> +90)
TFORM5='1E'
TTYPE5='ECL_LAT' / entire fieldname = ECL_LAT
OFFSET5=16
TUNIT5='deg'
COMMENT  Right ascension, in deg (0 -> 360)
TFORM6='1E'
TTYPE6='RA' / entire fieldname = RA
OFFSET6=20
TUNIT6='deg'
COMMENT  Declination, in deg (-90 -> +90)
TFORM7='1E'
TTYPE7='DEC' / entire fieldname = DEC
OFFSET7=24
TUNIT7='deg'
COMMENT 
COMMENT  Coadded Interferogram and Variances
COMMENT 
COMMENT  Coadded interferogram, in counts
TFORM8='512E'
TDIM8='(512)'
TTYPE8='COADDED_' / entire fieldname = COADDED_IFG
OFFSET8=28
TUNIT8=' '
COMMENT  Variance of real part of coadd spectrum, in (MJy/sr)^2
TFORM9='210E'
TDIM9='(210)'
TTYPE9='REAL_VAR' / entire fieldname = REAL_VARIANCE
OFFSET9=2076
TUNIT9='(MJy/sr)^2'
COMMENT  Variance of imaginary part of coadd spectrum, in (MJy/sr)^2
TFORM10='210E'
TDIM10='(210)'
TTYPE10='IMAG_VAR' / entire fieldname = IMAG_VARIANCE
OFFSET10=2916
TUNIT10='(MJy/sr)^2'
COMMENT  Covariance between real and imaginary
COMMENT     parts of coadd spectrum, in (MJy/sr)^2
TFORM11='210E'
TDIM11='(210)'
TTYPE11='REAL_IMA' / entire fieldname = REAL_IMAG_VARIANCE
OFFSET11=3756
TUNIT11='(MJy/sr)^2'
COMMENT  
COMMENT  Number and Times of IFGs
COMMENT 
COMMENT  Number of IFGs in coadd
TFORM12='1J'
TTYPE12='NUM_IFGS' / entire fieldname = NUM_IFGS
OFFSET12=4596
TUNIT12=' '
COMMENT  Glitch rate for coadded IFG, in glitches/s
TFORM13='1E'
TTYPE13='GLITCH_R' / entire fieldname = GLITCH_RATE
OFFSET13=4600
TUNIT13='gl/s '
COMMENT  Glitch rate weighted number of IFGs in coadd
TFORM14='1E'
TTYPE14='ADJ_NUM_' / entire fieldname = ADJ_NUM_IFGS
OFFSET14=4604
TUNIT14=' '
COMMENT  Average data collection time in seconds since
COMMENT     00:00.00 UTC, 1 January 1981
TFORM15='1D'
TTYPE15='TIME' / entire fieldname = TIME
OFFSET15=4608
TUNIT15='s'
COMMENT  Observation times of IFGs in the coadd; 
COMMENT     in hundredths of days since ejection of the 
COMMENT     FIRAS aperture cover at
COMMENT     11:18.00 UTC, 21 November 1989
TFORM16='100J'
TDIM16='(100)'
TTYPE16='IFG_TIME' / entire fieldname = IFG_TIMES
OFFSET16=4616
TUNIT16='d*100'
COMMENT  Flag indicating orphan IFGs, which occur 
COMMENT     when a coadd is composed of only 1 or 
COMMENT     2 IFGs.  In all other cases, the coadd
COMMENT     is composed of three or more IFGs;
COMMENT     applicable only to sky data.
COMMENT     Flag = 1 indicates 1 or 2 IFGS in the coadd;
COMMENT     flag = 0 indicates 3 or more IFGs in the coadd.
TFORM17='1B'
TTYPE17='ORPHANS' / entire fieldname = ORPHANS
OFFSET17=5016
TUNIT17=' '
COMMENT 
COMMENT  Template Information
COMMENT 
COMMENT  Number of templates subtracted from coadded IFG
TFORM18='1J'
TTYPE18='NUM_TEMP' / entire fieldname = NUM_TEMPLATES
OFFSET18=5017
TUNIT18=' '
COMMENT  Number of IFGS used in forming the templates
TFORM19='1J'
TTYPE19='TPL_NUM_' / entire fieldname = TPL_NUM_IFGS
OFFSET19=5021
TUNIT19=' '
COMMENT  Flag indicating use of IFGs from neighboring
COMMENT     pixels in template formation (suitable
COMMENT     IFGs from 8 neighboring pixels);
COMMENT     applicable only to sky data.
COMMENT     Flag = 1 indicates neighbor IFGs were used;
COMMENT     flag = 0 indicates neighbor IFGs were not used.
TFORM20='1B'
TTYPE20='NEIGHBOR' / entire fieldname = NEIGHBORS
OFFSET20=5025
TUNIT20=' '
COMMENT  Number of IFGS from neighboring pixels used in
COMMENT     forming the templates; only for sky data
TFORM21='1J'
TTYPE21='NBR_NUM_' / entire fieldname = NBR_NUM_IFGS
OFFSET21=5026
TUNIT21=' '
COMMENT  Observation times of IFGs used in template 
COMMENT     formation; in seconds since
COMMENT     00:00.00 UTC, 1 January 1981
TFORM22='100D'
TDIM22='(100)'
TTYPE22='TPL_TIME' / entire fieldname = TPL_TIMES
OFFSET22=5030
TUNIT22='s'
COMMENT  Pixel numbers of IFGs used in templates
TFORM23='100J'
TDIM23='(100)'
TTYPE23='TPL_PIXE' / entire fieldname = TPL_PIXELS
OFFSET23=5830
TUNIT23=' '
COMMENT 
COMMENT  Bolometer Bias and Voltage
COMMENT 
COMMENT  Commanded bolometer bias, in V
TFORM24='1E'
TTYPE24='BOLOM_BI' / entire fieldname = BOLOM_BIAS
OFFSET24=6230
TUNIT24='V'
COMMENT  Bolometer readout voltage, in V
TFORM25='1E'
TTYPE25='BOLOM_VO' / entire fieldname = BOLOM_VOLTAGE
OFFSET25=6234
TUNIT25='V'
COMMENT 
COMMENT  Instrument Temperatures
COMMENT 
COMMENT  External calibrator temperature, in K
TFORM26='1E'
TTYPE26='XCAL_TEM' / entire fieldname = XCAL_TEMP
OFFSET26=6238
TUNIT26='K'
COMMENT  Internal calibrator temperature, in K
TFORM27='1E'
TTYPE27='ICAL_TEM' / entire fieldname = ICAL_TEMP
OFFSET27=6242
TUNIT27='K'
COMMENT  Sky horn temperature, in K
TFORM28='1E'
TTYPE28='SKYHORN_' / entire fieldname = SKYHORN_TEMP
OFFSET28=6246
TUNIT28='K'
COMMENT  Reference horn temperature, in K
TFORM29='1E'
TTYPE29='REFHORN_' / entire fieldname = REFHORN_TEMP
OFFSET29=6250
TUNIT29='K'
COMMENT  Dihedral mirror temperature, in K
TFORM30='1E'
TTYPE30='DIHEDRAL' / entire fieldname = DIHEDRAL_TEMP
OFFSET30=6254
TUNIT30='K'
COMMENT  Collimator mirror temperature, in K
TFORM31='1E'
TTYPE31='MIRROR_T' / entire fieldname = MIRROR_TEMP
OFFSET31=6258
TUNIT31='K'
COMMENT  Bolometer bath temperature, in K
TFORM32='1E'
TTYPE32='BATH_TEM' / entire fieldname = BATH_TEMP
OFFSET32=6262
TUNIT32='K'
COMMENT 
END

--------------------------------------------------------------------------------

	Coadded Sky Interferograms

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'SKY-IFG'            / Coadded sky interferograms
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LLSS'               / Channel and mirror transport mechanism scan
COMMENT                        / mode identifier.  The first two characters
COMMENT                        / indicate the channel, the first being the
COMMENT                        / instrument side: right (R) or left (L); and
COMMENT                        / the second being the frequency: high (H) or
COMMENT                        / low (L).  The third and fourth characters
COMMENT                        / indicate the scan mode, the third being the
COMMENT                        / scan length: short (S) or long (L); and the
COMMENT                        / fourth being the scan speed: slow (S) or 
COMMENT                        / fast (F).  In addition, the scan mode may
COMMENT                        / take the following values for low frequency
COMMENT                        / data only (channel = RL or LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial variance
COMMENT                        / point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between variance 
COMMENT                        / points in GHz
NUM_FREQ=                   43 / Number of frequency points in variance
COMMENT                        / with good data
PEAK_POS=                  360 / Interferogram peak position
FFT_LENGTH=                640 / Length of Fast Fourier Transform used
END
COMMENT
TIMVERSN= 'OGIP/93-003'        / OGIP memo number where the convention
COMMENT                        / is described      
COMMENT    The times reported in this file are atomic seconds elapsed
COMMENT    since 00:00:00 UTC, 1 January 1981.  Time information is
COMMENT    recorded in a manner consistent with the convention specified
COMMENT    in OGIP/93-003 with the understanding that time is counted
COMMENT    in atomic seconds and the origin of time (MJDREF) is quoted
COMMENT    in ephemeris MJD.
TIMESYS = '1981.00'      / time system (same as IRAS)
MJDREFI =         44605  / Integer portion of ephemeris MJD
COMMENT                  / corresponding to 0h UTC 1 Jan 1981
MJDREFF = 0.00059240741  / Fractional portion of ephemeris MJD
COMMENT                  / corresponding to 0h UTC 1 Jan 1981
TIMEUNIT= 's      '      / unit for TSTART, TSTOP, TIMEZERO = seconds
TSTART  = 280713605.000  / observation start time in TIMESYS system
TSTOP   = 306806405.990  / observation stop time in TIMESYS system
COMMENT 
COMMENT 
COMMENT  FIRAS Coadded Interferogram
COMMENT  Project Dataset Record Structure 
COMMENT 
COMMENT 
COMMENT  Instrument Attitude Information
COMMENT 
COMMENT  FIRAS pixel number (resolution 6)
TFORM1='1J'
TTYPE1='PIXEL' / entire fieldname = PIXEL
OFFSET1=0
TUNIT1=' '
COMMENT  Galactic longitude, in deg (0 -> 360)
TFORM2='1E'
TTYPE2='GAL_LON' / entire fieldname = GAL_LON
OFFSET2=4
TUNIT2='deg'
COMMENT  Galactic latitude, in deg (-90 -> +90)
TFORM3='1E'
TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT
OFFSET3=8
TUNIT3='deg'
COMMENT  Ecliptic longitude, epoch 2000.0, in deg (0 -> 360)
TFORM4='1E'
TTYPE4='ECL_LON' / entire fieldname = ECL_LON
OFFSET4=12
TUNIT4='deg'
COMMENT  Ecliptic latitude, epoch 2000.0, in deg (-90 -> +90)
TFORM5='1E'
TTYPE5='ECL_LAT' / entire fieldname = ECL_LAT
OFFSET5=16
TUNIT5='deg'
COMMENT  Right ascension, in deg (0 -> 360)
TFORM6='1E'
TTYPE6='RA' / entire fieldname = RA
OFFSET6=20
TUNIT6='deg'
COMMENT  Declination, in deg (-90 -> +90)
TFORM7='1E'
TTYPE7='DEC' / entire fieldname = DEC
OFFSET7=24
TUNIT7='deg'
COMMENT 
COMMENT  Coadded Interferogram and Variances
COMMENT 
COMMENT  Coadded interferogram, in counts
TFORM8='512E'
TDIM8='(512)'
TTYPE8='COADDED_' / entire fieldname = COADDED_IFG
OFFSET8=28
TUNIT8=' '
COMMENT  Variance of real part of coadd spectrum, in (MJy/sr)^2
TFORM9='210E'
TDIM9='(210)'
TTYPE9='REAL_VAR' / entire fieldname = REAL_VARIANCE
OFFSET9=2076
TUNIT9='(MJy/sr)^2'
COMMENT  Variance of imaginary part of coadd spectrum, in (MJy/sr)^2
TFORM10='210E'
TDIM10='(210)'
TTYPE10='IMAG_VAR' / entire fieldname = IMAG_VARIANCE
OFFSET10=2916
TUNIT10='(MJy/sr)^2'
COMMENT  Covariance between real and imaginary
COMMENT     parts of coadd spectrum, in (MJy/sr)^2
TFORM11='210E'
TDIM11='(210)'
TTYPE11='REAL_IMA' / entire fieldname = REAL_IMAG_VARIANCE
OFFSET11=3756
TUNIT11='(MJy/sr)^2'
COMMENT  
COMMENT  Number and Times of IFGs
COMMENT 
COMMENT  Number of IFGs in coadd
TFORM12='1J'
TTYPE12='NUM_IFGS' / entire fieldname = NUM_IFGS
OFFSET12=4596
TUNIT12=' '
COMMENT  Glitch rate for coadded IFG, in glitches/s
TFORM13='1E'
TTYPE13='GLITCH_R' / entire fieldname = GLITCH_RATE
OFFSET13=4600
TUNIT13='gl/s '
COMMENT  Glitch rate weighted number of IFGs in coadd
TFORM14='1E'
TTYPE14='ADJ_NUM_' / entire fieldname = ADJ_NUM_IFGS
OFFSET14=4604
TUNIT14=' '
COMMENT  Average data collection time in seconds since
COMMENT     00:00.00 UTC, 1 January 1981
TFORM15='1D'
TTYPE15='TIME' / entire fieldname = TIME
OFFSET15=4608
TUNIT15='s'
COMMENT  Observation times of IFGs in the coadd; 
COMMENT     in hundredths of days since ejection of the 
COMMENT     FIRAS aperture cover at
COMMENT     11:18.00 UTC, 21 November 1989
TFORM16='100J'
TDIM16='(100)'
TTYPE16='IFG_TIME' / entire fieldname = IFG_TIMES
OFFSET16=4616
TUNIT16='d*100'
COMMENT  Flag indicating orphan IFGs, which occur 
COMMENT     when a coadd is composed of only 1 or 
COMMENT     2 IFGs.  In all other cases, the coadd
COMMENT     is composed of three or more IFGs;
COMMENT     applicable only to sky data.
COMMENT     Flag = 1 indicates 1 or 2 IFGS in the coadd;
COMMENT     flag = 0 indicates 3 or more IFGs in the coadd.
TFORM17='1B'
TTYPE17='ORPHANS' / entire fieldname = ORPHANS
OFFSET17=5016
TUNIT17=' '
COMMENT 
COMMENT  Template Information
COMMENT 
COMMENT  Number of templates subtracted from coadded IFG
TFORM18='1J'
TTYPE18='NUM_TEMP' / entire fieldname = NUM_TEMPLATES
OFFSET18=5017
TUNIT18=' '
COMMENT  Number of IFGS used in forming the templates
TFORM19='1J'
TTYPE19='TPL_NUM_' / entire fieldname = TPL_NUM_IFGS
OFFSET19=5021
TUNIT19=' '
COMMENT  Flag indicating use of IFGs from neighboring
COMMENT     pixels in template formation (suitable
COMMENT     IFGs from 8 neighboring pixels);
COMMENT     applicable only to sky data.
COMMENT     Flag = 1 indicates neighbor IFGs were used;
COMMENT     flag = 0 indicates neighbor IFGs were not used.
TFORM20='1B'
TTYPE20='NEIGHBOR' / entire fieldname = NEIGHBORS
OFFSET20=5025
TUNIT20=' '
COMMENT  Number of IFGS from neighboring pixels used in
COMMENT     forming the templates; only for sky data
TFORM21='1J'
TTYPE21='NBR_NUM_' / entire fieldname = NBR_NUM_IFGS
OFFSET21=5026
TUNIT21=' '
COMMENT  Observation times of IFGs used in template 
COMMENT     formation; in seconds since
COMMENT     00:00.00 UTC, 1 January 1981
TFORM22='100D'
TDIM22='(100)'
TTYPE22='TPL_TIME' / entire fieldname = TPL_TIMES
OFFSET22=5030
TUNIT22='s'
COMMENT  Pixel numbers of IFGs used in templates
TFORM23='100J'
TDIM23='(100)'
TTYPE23='TPL_PIXE' / entire fieldname = TPL_PIXELS
OFFSET23=5830
TUNIT23=' '
COMMENT 
COMMENT  Bolometer Bias and Voltage
COMMENT 
COMMENT  Commanded bolometer bias, in V
TFORM24='1E'
TTYPE24='BOLOM_BI' / entire fieldname = BOLOM_BIAS
OFFSET24=6230
TUNIT24='V'
COMMENT  Bolometer readout voltage, in V
TFORM25='1E'
TTYPE25='BOLOM_VO' / entire fieldname = BOLOM_VOLTAGE
OFFSET25=6234
TUNIT25='V'
COMMENT 
COMMENT  Instrument Temperatures
COMMENT 
COMMENT  External calibrator temperature, in K
TFORM26='1E'
TTYPE26='XCAL_TEM' / entire fieldname = XCAL_TEMP
OFFSET26=6238
TUNIT26='K'
COMMENT  Internal calibrator temperature, in K
TFORM27='1E'
TTYPE27='ICAL_TEM' / entire fieldname = ICAL_TEMP
OFFSET27=6242
TUNIT27='K'
COMMENT  Sky horn temperature, in K
TFORM28='1E'
TTYPE28='SKYHORN_' / entire fieldname = SKYHORN_TEMP
OFFSET28=6246
TUNIT28='K'
COMMENT  Reference horn temperature, in K
TFORM29='1E'
TTYPE29='REFHORN_' / entire fieldname = REFHORN_TEMP
OFFSET29=6250
TUNIT29='K'
COMMENT  Dihedral mirror temperature, in K
TFORM30='1E'
TTYPE30='DIHEDRAL' / entire fieldname = DIHEDRAL_TEMP
OFFSET30=6254
TUNIT30='K'
COMMENT  Collimator mirror temperature, in K
TFORM31='1E'
TTYPE31='MIRROR_T' / entire fieldname = MIRROR_TEMP
OFFSET31=6258
TUNIT31='K'
COMMENT  Bolometer bath temperature, in K
TFORM32='1E'
TTYPE32='BATH_TEM' / entire fieldname = BATH_TEMP
OFFSET32=6262
TUNIT32='K'
COMMENT 
END

--------------------------------------------------------------------------------

	Calibrated Calibration Spectra

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'CAL-SPEC'           / Calibrated calibration spectra
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LLSS'               / Channel and mirror transport mechanism scan
COMMENT                        / mode identifier.  The first two characters
COMMENT                        / indicate the channel, the first being the
COMMENT                        / instrument side: right (R) or left (L); and
COMMENT                        / the second being the frequency: high (H) or
COMMENT                        / low (L).  The third and fourth characters
COMMENT                        / indicate the scan mode, the third being the
COMMENT                        / scan length: short (S) or long (L); and the
COMMENT                        / fourth being the scan speed: slow (S) or 
COMMENT                        / fast (F).  In addition, the scan mode may
COMMENT                        / take the following values for low frequency
COMMENT                        / data only (channel = RL or LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points 
COMMENT                        / in GHz
NUM_FREQ=                   43 / Number of frequency points with good data
FFT_LENGTH=                640 / Length of Fast Fourier Transform used
END
COMMENT
TIMVERSN= 'OGIP/93-003'        / OGIP memo number where the convention
COMMENT                        / is described      
COMMENT    The times reported in this file are atomic seconds elapsed
COMMENT    since 00:00:00 UTC, 1 January 1981.  Time information is
COMMENT    recorded in a manner consistent with the convention specified
COMMENT    in OGIP/93-003 with the understanding that time is counted
COMMENT    in atomic seconds and the origin of time (MJDREF) is quoted
COMMENT    in ephemeris MJD.
TIMESYS = '1981.00'      / time system (same as IRAS)
MJDREFI =         44605  / Integer portion of ephemeris MJD
COMMENT                  / corresponding to 0h UTC 1 Jan 1981
MJDREFF = 0.00059240741  / Fractional portion of ephemeris MJD
COMMENT                  / corresponding to 0h UTC 1 Jan 1981
TIMEUNIT= 's      '      / unit for TSTART, TSTOP, TIMEZERO = seconds
TSTART  = 280713605.000  / observation start time in TIMESYS system
TSTOP   = 306806405.990  / observation stop time in TIMESYS system
COMMENT 
COMMENT 
COMMENT  FIRAS Spectrum
COMMENT  Project Dataset Record Structure 
COMMENT 
COMMENT 
COMMENT  Instrument Attitude Information
COMMENT 
COMMENT  FIRAS pixel number (resolution 6)
TFORM1='1J'
TTYPE1='PIXEL' / entire fieldname = PIXEL
OFFSET1=0
TUNIT1=' '
COMMENT  Galactic longitude, in deg (0 -> 360)
TFORM2='1E'
TTYPE2='GAL_LON' / entire fieldname = GAL_LON
OFFSET2=4
TUNIT2='deg'
COMMENT  Galactic latitude, in deg (-90 -> +90)
TFORM3='1E'
TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT
OFFSET3=8
TUNIT3='deg'
COMMENT  Ecliptic longitude, epoch 2000.0, in deg (0 -> 360)
TFORM4='1E'
TTYPE4='ECL_LON' / entire fieldname = ECL_LON
OFFSET4=12
TUNIT4='deg'
COMMENT  Ecliptic latitude, epoch 2000.0, in deg (-90 -> +90)
TFORM5='1E'
TTYPE5='ECL_LAT' / entire fieldname = ECL_LAT
OFFSET5=16
TUNIT5='deg'
COMMENT  Right ascension, in deg (0 -> 360)
TFORM6='1E'
TTYPE6='RA' / entire fieldname = RA
OFFSET6=20
TUNIT6='deg'
COMMENT  Declination, in deg (-90 -> +90)
TFORM7='1E'
TTYPE7='DEC' / entire fieldname = DEC
OFFSET7=24
TUNIT7='deg'
COMMENT 
COMMENT  Spectrum and Sigmas
COMMENT 
COMMENT  Real part of spectrum, in MJy/sr
TFORM8='210E'
TDIM8='(210)'
TTYPE8='REAL_SPE' / entire fieldname = REAL_SPECTRUM
OFFSET8=28
TUNIT8='MJy/sr'
COMMENT  Imaginary part of spectrum, in MJy/sr
TFORM9='210E'
TDIM9='(210)'
TTYPE9='IMAG_SPE' / entire fieldname = IMAG_SPECTRUM
OFFSET9=868
TUNIT9='MJy/sr'
COMMENT  Sigmas of spectrum, in MJy/sr
TFORM10='210E'
TDIM10='(210)'
TTYPE10='SIGMAS' / entire fieldname = SIGMAS
OFFSET10=1708
TUNIT10='MJy/sr'
COMMENT  
COMMENT  Number and Times of IFGs
COMMENT 
COMMENT  Number of IFGs in spectrum
TFORM11='1J'
TTYPE11='NUM_IFGS' / entire fieldname = NUM_IFGS
OFFSET11=2548
TUNIT11=' '
COMMENT  Glitch rate for spectrum, in glitches/s
TFORM12='1E'
TTYPE12='GLITCH_R' / entire fieldname = GLITCH_RATE
OFFSET12=2552
TUNIT12='gl/s'
COMMENT  Glitch rate weighted number of IFGs in spectrum
TFORM13='1E'
TTYPE13='ADJ_NUM_' / entire fieldname = ADJ_NUM_IFGS
OFFSET13=2556
TUNIT13=' '
COMMENT  Average data collection time in seconds since
COMMENT     00:00.00 UTC, 1 January 1981
TFORM14='1D'
TTYPE14='TIME' / entire fieldname = TIME
OFFSET14=2560
TUNIT14='s'
COMMENT  Observation times of IFGs in the spectrum; 
COMMENT     in hundredths of days since ejection of the 
COMMENT     FIRAS aperture cover at
COMMENT     11:18.00 UTC, 21 November 1989
TFORM15='100J'
TDIM15='(100)'
TTYPE15='IFG_TIME' / entire fieldname = IFG_TIMES
OFFSET15=2568
TUNIT15='d*100'
COMMENT  Flag indicating orphan IFGs, which occur 
COMMENT     when a spectrum is composed of only 1 or 
COMMENT     2 IFGs.  In all other cases, the spectrum
COMMENT     is composed of three or more IFGs;
COMMENT     applicable only to sky data.
COMMENT     Flag = 1 indicates 1 or 2 IFGS in the spectrum;
COMMENT     flag = 0 indicates 3 or more IFGs in the spectrum.
TFORM16='1B'
TTYPE16='ORPHANS' / entire fieldname = ORPHANS
OFFSET16=2968
TUNIT16=' '
COMMENT 
COMMENT  Template Information
COMMENT 
COMMENT  Number of templates subtracted from spectrum
TFORM17='1J'
TTYPE17='NUM_TEMP' / entire fieldname = NUM_TEMPLATES
OFFSET17=2969
TUNIT17=' '
COMMENT  Number of IFGS used in forming the templates
TFORM18='1J'
TTYPE18='TPL_NUM_' / entire fieldname = TPL_NUM_IFGS
OFFSET18=2973
TUNIT18=' '
COMMENT  Flag indicating use of IFGs from neighboring
COMMENT     pixels in template formation (suitable
COMMENT     IFGs from 8 neighboring pixels);
COMMENT     applicable only to sky data.
COMMENT     Flag = 1 indicates neighbor IFGs were used;
COMMENT     flag = 0 indicates neighbor IFGs were not used.
TFORM19='1B'
TTYPE19='NEIGHBOR' / entire fieldname = NEIGHBORS
OFFSET19=2977
TUNIT19=' '
COMMENT  Number of IFGS from neighboring pixels used in
COMMENT     forming the templates; only for sky data
TFORM20='1J'
TTYPE20='NBR_NUM_' / entire fieldname = NBR_NUM_IFGS
OFFSET20=2978
TUNIT20=' '
COMMENT  Observation times of IFGs used in template 
COMMENT     formation; in seconds since
COMMENT     00:00.00 UTC, 1 January 1981
TFORM21='100D'
TDIM21='(100)'
TTYPE21='TPL_TIME' / entire fieldname = TPL_TIMES
OFFSET21=2982
TUNIT21='s'
COMMENT  Pixel numbers of IFGs used in templates
TFORM22='100J'
TDIM22='(100)'
TTYPE22='TPL_PIXE' / entire fieldname = TPL_PIXELS
OFFSET22=3782
TUNIT22=' '
COMMENT 
COMMENT   Bolometer Response Function
COMMENT 
COMMENT  Commanded bolometer bias, in V
TFORM23='1E'
TTYPE23='BOLOM_BI' / entire fieldname = BOLOM_BIAS
OFFSET23=4182
TUNIT23='V'
COMMENT  Bolometer readout voltage, in V
TFORM24='1E'
TTYPE24='BOLOM_VO' / entire fieldname = BOLOM_VOLTAGE
OFFSET24=4186
TUNIT24='V'
COMMENT  Bolometer DC response, in V/W
TFORM25='1E'
TTYPE25='DC_RESPO' / entire fieldname = DC_RESPONSE
OFFSET25=4190
TUNIT25='V/W'
COMMENT  Bolometer time constant, in s
TFORM26='1E'
TTYPE26='TIME_CON' / entire fieldname = TIME_CONSTANT
OFFSET26=4194
TUNIT26='s'
COMMENT  Linear autophase correction, in rad
TFORM27='1E'
TTYPE27='PHASE_CO' / entire fieldname = PHASE_CORR
OFFSET27=4198
TUNIT27='rad'
COMMENT 
COMMENT  Instrument Temperatures
COMMENT 
COMMENT  External calibrator temperature, in K
TFORM28='1E'
TTYPE28='XCAL_TEM' / entire fieldname = XCAL_TEMP
OFFSET28=4202
TUNIT28='K'
COMMENT  Internal calibrator temperature, in K
TFORM29='1E'
TTYPE29='ICAL_TEM' / entire fieldname = ICAL_TEMP
OFFSET29=4206
TUNIT29='K'
COMMENT  Sky horn temperature, in K
TFORM30='1E'
TTYPE30='SKYHORN_' / entire fieldname = SKYHORN_TEMP
OFFSET30=4210
TUNIT30='K'
COMMENT  Reference horn temperature, in K
TFORM31='1E'
TTYPE31='REFHORN_' / entire fieldname = REFHORN_TEMP
OFFSET31=4214
TUNIT31='K'
COMMENT  Dihedral mirror temperature, in K
TFORM32='1E'
TTYPE32='DIHEDRAL' / entire fieldname = DIHEDRAL_TEMP
OFFSET32=4218
TUNIT32='K'
COMMENT  Collimator mirror temperature, in K
TFORM33='1E'
TTYPE33='MIRROR_T' / entire fieldname = MIRROR_TEMP
OFFSET33=4222
TUNIT33='K'
COMMENT  Bolometer operating temperature, in K
TFORM34='1E'
TTYPE34='BOLOM_TE' / entire fieldname = BOLOM_TEMP
OFFSET34=4226
TUNIT34='K'
COMMENT  Bolometer bath temperature, in K
TFORM35='1E'
TTYPE35='BATH_TEM' / entire fieldname = BATH_TEMP
OFFSET35=4230
TUNIT35='K'
COMMENT 
END

--------------------------------------------------------------------------------

	Calibrated Sky Spectra

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'SKY-SPEC'           / Calibrated sky spectra
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LLSS'               / Channel and mirror transport mechanism scan
COMMENT                        / mode identifier.  The first two characters
COMMENT                        / indicate the channel, the first being the
COMMENT                        / instrument side: right (R) or left (L); and
COMMENT                        / the second being the frequency: high (H) or
COMMENT                        / low (L).  The third and fourth characters
COMMENT                        / indicate the scan mode, the third being the
COMMENT                        / scan length: short (S) or long (L); and the
COMMENT                        / fourth being the scan speed: slow (S) or 
COMMENT                        / fast (F).  In addition, the scan mode may
COMMENT                        / take the following values for low frequency
COMMENT                        / data only (channel = RL or LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points 
COMMENT                        / in GHz
NUM_FREQ=                   43 / Number of frequency points with good data
FFT_LENGTH=                640 / Length of Fast Fourier Transform used
END
COMMENT
TIMVERSN= 'OGIP/93-003'        / OGIP memo number where the convention
COMMENT                        / is described      
COMMENT    The times reported in this file are atomic seconds elapsed
COMMENT    since 00:00:00 UTC, 1 January 1981.  Time information is
COMMENT    recorded in a manner consistent with the convention specified
COMMENT    in OGIP/93-003 with the understanding that time is counted
COMMENT    in atomic seconds and the origin of time (MJDREF) is quoted
COMMENT    in ephemeris MJD.
TIMESYS = '1981.00'      / time system (same as IRAS)
MJDREFI =         44605  / Integer portion of ephemeris MJD
COMMENT                  / corresponding to 0h UTC 1 Jan 1981
MJDREFF = 0.00059240741  / Fractional portion of ephemeris MJD
COMMENT                  / corresponding to 0h UTC 1 Jan 1981
TIMEUNIT= 's      '      / unit for TSTART, TSTOP, TIMEZERO = seconds
TSTART  = 280713605.000  / observation start time in TIMESYS system
TSTOP   = 306806405.990  / observation stop time in TIMESYS system
COMMENT 
COMMENT 
COMMENT  FIRAS Spectrum
COMMENT  Project Dataset Record Structure 
COMMENT 
COMMENT 
COMMENT  Instrument Attitude Information
COMMENT 
COMMENT  FIRAS pixel number (resolution 6)
TFORM1='1J'
TTYPE1='PIXEL' / entire fieldname = PIXEL
OFFSET1=0
TUNIT1=' '
COMMENT  Galactic longitude, in deg (0 -> 360)
TFORM2='1E'
TTYPE2='GAL_LON' / entire fieldname = GAL_LON
OFFSET2=4
TUNIT2='deg'
COMMENT  Galactic latitude, in deg (-90 -> +90)
TFORM3='1E'
TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT
OFFSET3=8
TUNIT3='deg'
COMMENT  Ecliptic longitude, epoch 2000.0, in deg (0 -> 360)
TFORM4='1E'
TTYPE4='ECL_LON' / entire fieldname = ECL_LON
OFFSET4=12
TUNIT4='deg'
COMMENT  Ecliptic latitude, epoch 2000.0, in deg (-90 -> +90)
TFORM5='1E'
TTYPE5='ECL_LAT' / entire fieldname = ECL_LAT
OFFSET5=16
TUNIT5='deg'
COMMENT  Right ascension, in deg (0 -> 360)
TFORM6='1E'
TTYPE6='RA' / entire fieldname = RA
OFFSET6=20
TUNIT6='deg'
COMMENT  Declination, in deg (-90 -> +90)
TFORM7='1E'
TTYPE7='DEC' / entire fieldname = DEC
OFFSET7=24
TUNIT7='deg'
COMMENT 
COMMENT  Spectrum and Sigmas
COMMENT 
COMMENT  Real part of spectrum, in MJy/sr
TFORM8='210E'
TDIM8='(210)'
TTYPE8='REAL_SPE' / entire fieldname = REAL_SPECTRUM
OFFSET8=28
TUNIT8='MJy/sr'
COMMENT  Imaginary part of spectrum, in MJy/sr
TFORM9='210E'
TDIM9='(210)'
TTYPE9='IMAG_SPE' / entire fieldname = IMAG_SPECTRUM
OFFSET9=868
TUNIT9='MJy/sr'
COMMENT  Sigmas of spectrum, in MJy/sr
TFORM10='210E'
TDIM10='(210)'
TTYPE10='SIGMAS' / entire fieldname = SIGMAS
OFFSET10=1708
TUNIT10='MJy/sr'
COMMENT  
COMMENT  Number and Times of IFGs
COMMENT 
COMMENT  Number of IFGs in spectrum
TFORM11='1J'
TTYPE11='NUM_IFGS' / entire fieldname = NUM_IFGS
OFFSET11=2548
TUNIT11=' '
COMMENT  Glitch rate for spectrum, in glitches/s
TFORM12='1E'
TTYPE12='GLITCH_R' / entire fieldname = GLITCH_RATE
OFFSET12=2552
TUNIT12='gl/s'
COMMENT  Glitch rate weighted number of IFGs in spectrum
TFORM13='1E'
TTYPE13='ADJ_NUM_' / entire fieldname = ADJ_NUM_IFGS
OFFSET13=2556
TUNIT13=' '
COMMENT  Average data collection time in seconds since
COMMENT     00:00.00 UTC, 1 January 1981
TFORM14='1D'
TTYPE14='TIME' / entire fieldname = TIME
OFFSET14=2560
TUNIT14='s'
COMMENT  Observation times of IFGs in the spectrum; 
COMMENT     in hundredths of days since ejection of the 
COMMENT     FIRAS aperture cover at
COMMENT     11:18.00 UTC, 21 November 1989
TFORM15='100J'
TDIM15='(100)'
TTYPE15='IFG_TIME' / entire fieldname = IFG_TIMES
OFFSET15=2568
TUNIT15='d*100'
COMMENT  Flag indicating orphan IFGs, which occur 
COMMENT     when a spectrum is composed of only 1 or 
COMMENT     2 IFGs.  In all other cases, the spectrum
COMMENT     is composed of three or more IFGs;
COMMENT     applicable only to sky data.
COMMENT     Flag = 1 indicates 1 or 2 IFGS in the spectrum;
COMMENT     flag = 0 indicates 3 or more IFGs in the spectrum.
TFORM16='1B'
TTYPE16='ORPHANS' / entire fieldname = ORPHANS
OFFSET16=2968
TUNIT16=' '
COMMENT 
COMMENT  Template Information
COMMENT 
COMMENT  Number of templates subtracted from spectrum
TFORM17='1J'
TTYPE17='NUM_TEMP' / entire fieldname = NUM_TEMPLATES
OFFSET17=2969
TUNIT17=' '
COMMENT  Number of IFGS used in forming the templates
TFORM18='1J'
TTYPE18='TPL_NUM_' / entire fieldname = TPL_NUM_IFGS
OFFSET18=2973
TUNIT18=' '
COMMENT  Flag indicating use of IFGs from neighboring
COMMENT     pixels in template formation (suitable
COMMENT     IFGs from 8 neighboring pixels);
COMMENT     applicable only to sky data.
COMMENT     Flag = 1 indicates neighbor IFGs were used;
COMMENT     flag = 0 indicates neighbor IFGs were not used.
TFORM19='1B'
TTYPE19='NEIGHBOR' / entire fieldname = NEIGHBORS
OFFSET19=2977
TUNIT19=' '
COMMENT  Number of IFGS from neighboring pixels used in
COMMENT     forming the templates; only for sky data
TFORM20='1J'
TTYPE20='NBR_NUM_' / entire fieldname = NBR_NUM_IFGS
OFFSET20=2978
TUNIT20=' '
COMMENT  Observation times of IFGs used in template 
COMMENT     formation; in seconds since
COMMENT     00:00.00 UTC, 1 January 1981
TFORM21='100D'
TDIM21='(100)'
TTYPE21='TPL_TIME' / entire fieldname = TPL_TIMES
OFFSET21=2982
TUNIT21='s'
COMMENT  Pixel numbers of IFGs used in templates
TFORM22='100J'
TDIM22='(100)'
TTYPE22='TPL_PIXE' / entire fieldname = TPL_PIXELS
OFFSET22=3782
TUNIT22=' '
COMMENT 
COMMENT   Bolometer Response Function
COMMENT 
COMMENT  Commanded bolometer bias, in V
TFORM23='1E'
TTYPE23='BOLOM_BI' / entire fieldname = BOLOM_BIAS
OFFSET23=4182
TUNIT23='V'
COMMENT  Bolometer readout voltage, in V
TFORM24='1E'
TTYPE24='BOLOM_VO' / entire fieldname = BOLOM_VOLTAGE
OFFSET24=4186
TUNIT24='V'
COMMENT  Bolometer DC response, in V/W
TFORM25='1E'
TTYPE25='DC_RESPO' / entire fieldname = DC_RESPONSE
OFFSET25=4190
TUNIT25='V/W'
COMMENT  Bolometer time constant, in s
TFORM26='1E'
TTYPE26='TIME_CON' / entire fieldname = TIME_CONSTANT
OFFSET26=4194
TUNIT26='s'
COMMENT  Linear autophase correction, in rad
TFORM27='1E'
TTYPE27='PHASE_CO' / entire fieldname = PHASE_CORR
OFFSET27=4198
TUNIT27='rad'
COMMENT 
COMMENT  Instrument Temperatures
COMMENT 
COMMENT  External calibrator temperature, in K
TFORM28='1E'
TTYPE28='XCAL_TEM' / entire fieldname = XCAL_TEMP
OFFSET28=4202
TUNIT28='K'
COMMENT  Internal calibrator temperature, in K
TFORM29='1E'
TTYPE29='ICAL_TEM' / entire fieldname = ICAL_TEMP
OFFSET29=4206
TUNIT29='K'
COMMENT  Sky horn temperature, in K
TFORM30='1E'
TTYPE30='SKYHORN_' / entire fieldname = SKYHORN_TEMP
OFFSET30=4210
TUNIT30='K'
COMMENT  Reference horn temperature, in K
TFORM31='1E'
TTYPE31='REFHORN_' / entire fieldname = REFHORN_TEMP
OFFSET31=4214
TUNIT31='K'
COMMENT  Dihedral mirror temperature, in K
TFORM32='1E'
TTYPE32='DIHEDRAL' / entire fieldname = DIHEDRAL_TEMP
OFFSET32=4218
TUNIT32='K'
COMMENT  Collimator mirror temperature, in K
TFORM33='1E'
TTYPE33='MIRROR_T' / entire fieldname = MIRROR_TEMP
OFFSET33=4222
TUNIT33='K'
COMMENT  Bolometer operating temperature, in K
TFORM34='1E'
TTYPE34='BOLOM_TE' / entire fieldname = BOLOM_TEMP
OFFSET34=4226
TUNIT34='K'
COMMENT  Bolometer bath temperature, in K
TFORM35='1E'
TTYPE35='BATH_TEM' / entire fieldname = BATH_TEMP
OFFSET35=4230
TUNIT35='K'
COMMENT 
END

--------------------------------------------------------------------------------

	Differential Calibration Spectra

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'CAL-DIFF'           / Differential calibration spectra
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LLSS'               / Channel and mirror transport mechanism scan
COMMENT                        / mode identifier.  The first two characters
COMMENT                        / indicate the channel, the first being the
COMMENT                        / instrument side: right (R) or left (L); and
COMMENT                        / the second being the frequency: high (H) or
COMMENT                        / low (L).  The third and fourth characters
COMMENT                        / indicate the scan mode, the third being the
COMMENT                        / scan length: short (S) or long (L); and the
COMMENT                        / fourth being the scan speed: slow (S) or 
COMMENT                        / fast (F).  In addition, the scan mode may
COMMENT                        / take the following values for low frequency
COMMENT                        / data only (channel = RL or LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points 
COMMENT                        / in GHz
NUM_FREQ=                   43 / Number of frequency points with good data
FFT_LENGTH=                640 / Length of Fast Fourier Transform used
END
COMMENT
TIMVERSN= 'OGIP/93-003'        / OGIP memo number where the convention
COMMENT                        / is described      
COMMENT    The times reported in this file are atomic seconds elapsed
COMMENT    since 00:00:00 UTC, 1 January 1981.  Time information is
COMMENT    recorded in a manner consistent with the convention specified
COMMENT    in OGIP/93-003 with the understanding that time is counted
COMMENT    in atomic seconds and the origin of time (MJDREF) is quoted
COMMENT    in ephemeris MJD.
TIMESYS = '1981.00'      / time system (same as IRAS)
MJDREFI =         44605  / Integer portion of ephemeris MJD
COMMENT                  / corresponding to 0h UTC 1 Jan 1981
MJDREFF = 0.00059240741  / Fractional portion of ephemeris MJD
COMMENT                  / corresponding to 0h UTC 1 Jan 1981
TIMEUNIT= 's      '      / unit for TSTART, TSTOP, TIMEZERO = seconds
TSTART  = 280713605.000  / observation start time in TIMESYS system
TSTOP   = 306806405.990  / observation stop time in TIMESYS system
COMMENT 
COMMENT 
COMMENT  FIRAS Spectrum
COMMENT  Project Dataset Record Structure 
COMMENT 
COMMENT 
COMMENT  Instrument Attitude Information
COMMENT 
COMMENT  FIRAS pixel number (resolution 6)
TFORM1='1J'
TTYPE1='PIXEL' / entire fieldname = PIXEL
OFFSET1=0
TUNIT1=' '
COMMENT  Galactic longitude, in deg (0 -> 360)
TFORM2='1E'
TTYPE2='GAL_LON' / entire fieldname = GAL_LON
OFFSET2=4
TUNIT2='deg'
COMMENT  Galactic latitude, in deg (-90 -> +90)
TFORM3='1E'
TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT
OFFSET3=8
TUNIT3='deg'
COMMENT  Ecliptic longitude, epoch 2000.0, in deg (0 -> 360)
TFORM4='1E'
TTYPE4='ECL_LON' / entire fieldname = ECL_LON
OFFSET4=12
TUNIT4='deg'
COMMENT  Ecliptic latitude, epoch 2000.0, in deg (-90 -> +90)
TFORM5='1E'
TTYPE5='ECL_LAT' / entire fieldname = ECL_LAT
OFFSET5=16
TUNIT5='deg'
COMMENT  Right ascension, in deg (0 -> 360)
TFORM6='1E'
TTYPE6='RA' / entire fieldname = RA
OFFSET6=20
TUNIT6='deg'
COMMENT  Declination, in deg (-90 -> +90)
TFORM7='1E'
TTYPE7='DEC' / entire fieldname = DEC
OFFSET7=24
TUNIT7='deg'
COMMENT 
COMMENT  Spectrum and Sigmas
COMMENT 
COMMENT  Real part of spectrum, in MJy/sr
TFORM8='210E'
TDIM8='(210)'
TTYPE8='REAL_SPE' / entire fieldname = REAL_SPECTRUM
OFFSET8=28
TUNIT8='MJy/sr'
COMMENT  Imaginary part of spectrum, in MJy/sr
TFORM9='210E'
TDIM9='(210)'
TTYPE9='IMAG_SPE' / entire fieldname = IMAG_SPECTRUM
OFFSET9=868
TUNIT9='MJy/sr'
COMMENT  Sigmas of spectrum, in MJy/sr
TFORM10='210E'
TDIM10='(210)'
TTYPE10='SIGMAS' / entire fieldname = SIGMAS
OFFSET10=1708
TUNIT10='MJy/sr'
COMMENT  
COMMENT  Number and Times of IFGs
COMMENT 
COMMENT  Number of IFGs in spectrum
TFORM11='1J'
TTYPE11='NUM_IFGS' / entire fieldname = NUM_IFGS
OFFSET11=2548
TUNIT11=' '
COMMENT  Glitch rate for spectrum, in glitches/s
TFORM12='1E'
TTYPE12='GLITCH_R' / entire fieldname = GLITCH_RATE
OFFSET12=2552
TUNIT12='gl/s'
COMMENT  Glitch rate weighted number of IFGs in spectrum
TFORM13='1E'
TTYPE13='ADJ_NUM_' / entire fieldname = ADJ_NUM_IFGS
OFFSET13=2556
TUNIT13=' '
COMMENT  Average data collection time in seconds since
COMMENT     00:00.00 UTC, 1 January 1981
TFORM14='1D'
TTYPE14='TIME' / entire fieldname = TIME
OFFSET14=2560
TUNIT14='s'
COMMENT  Observation times of IFGs in the spectrum; 
COMMENT     in hundredths of days since ejection of the 
COMMENT     FIRAS aperture cover at
COMMENT     11:18.00 UTC, 21 November 1989
TFORM15='100J'
TDIM15='(100)'
TTYPE15='IFG_TIME' / entire fieldname = IFG_TIMES
OFFSET15=2568
TUNIT15='d*100'
COMMENT  Flag indicating orphan IFGs, which occur 
COMMENT     when a spectrum is composed of only 1 or 
COMMENT     2 IFGs.  In all other cases, the spectrum
COMMENT     is composed of three or more IFGs;
COMMENT     applicable only to sky data.
COMMENT     Flag = 1 indicates 1 or 2 IFGS in the spectrum;
COMMENT     flag = 0 indicates 3 or more IFGs in the spectrum.
TFORM16='1B'
TTYPE16='ORPHANS' / entire fieldname = ORPHANS
OFFSET16=2968
TUNIT16=' '
COMMENT 
COMMENT  Template Information
COMMENT 
COMMENT  Number of templates subtracted from spectrum
TFORM17='1J'
TTYPE17='NUM_TEMP' / entire fieldname = NUM_TEMPLATES
OFFSET17=2969
TUNIT17=' '
COMMENT  Number of IFGS used in forming the templates
TFORM18='1J'
TTYPE18='TPL_NUM_' / entire fieldname = TPL_NUM_IFGS
OFFSET18=2973
TUNIT18=' '
COMMENT  Flag indicating use of IFGs from neighboring
COMMENT     pixels in template formation (suitable
COMMENT     IFGs from 8 neighboring pixels);
COMMENT     applicable only to sky data.
COMMENT     Flag = 1 indicates neighbor IFGs were used;
COMMENT     flag = 0 indicates neighbor IFGs were not used.
TFORM19='1B'
TTYPE19='NEIGHBOR' / entire fieldname = NEIGHBORS
OFFSET19=2977
TUNIT19=' '
COMMENT  Number of IFGS from neighboring pixels used in
COMMENT     forming the templates; only for sky data
TFORM20='1J'
TTYPE20='NBR_NUM_' / entire fieldname = NBR_NUM_IFGS
OFFSET20=2978
TUNIT20=' '
COMMENT  Observation times of IFGs used in template 
COMMENT     formation; in seconds since
COMMENT     00:00.00 UTC, 1 January 1981
TFORM21='100D'
TDIM21='(100)'
TTYPE21='TPL_TIME' / entire fieldname = TPL_TIMES
OFFSET21=2982
TUNIT21='s'
COMMENT  Pixel numbers of IFGs used in templates
TFORM22='100J'
TDIM22='(100)'
TTYPE22='TPL_PIXE' / entire fieldname = TPL_PIXELS
OFFSET22=3782
TUNIT22=' '
COMMENT 
COMMENT   Bolometer Response Function
COMMENT 
COMMENT  Commanded bolometer bias, in V
TFORM23='1E'
TTYPE23='BOLOM_BI' / entire fieldname = BOLOM_BIAS
OFFSET23=4182
TUNIT23='V'
COMMENT  Bolometer readout voltage, in V
TFORM24='1E'
TTYPE24='BOLOM_VO' / entire fieldname = BOLOM_VOLTAGE
OFFSET24=4186
TUNIT24='V'
COMMENT  Bolometer DC response, in V/W
TFORM25='1E'
TTYPE25='DC_RESPO' / entire fieldname = DC_RESPONSE
OFFSET25=4190
TUNIT25='V/W'
COMMENT  Bolometer time constant, in s
TFORM26='1E'
TTYPE26='TIME_CON' / entire fieldname = TIME_CONSTANT
OFFSET26=4194
TUNIT26='s'
COMMENT  Linear autophase correction, in rad
TFORM27='1E'
TTYPE27='PHASE_CO' / entire fieldname = PHASE_CORR
OFFSET27=4198
TUNIT27='rad'
COMMENT 
COMMENT  Instrument Temperatures
COMMENT 
COMMENT  External calibrator temperature, in K
TFORM28='1E'
TTYPE28='XCAL_TEM' / entire fieldname = XCAL_TEMP
OFFSET28=4202
TUNIT28='K'
COMMENT  Internal calibrator temperature, in K
TFORM29='1E'
TTYPE29='ICAL_TEM' / entire fieldname = ICAL_TEMP
OFFSET29=4206
TUNIT29='K'
COMMENT  Sky horn temperature, in K
TFORM30='1E'
TTYPE30='SKYHORN_' / entire fieldname = SKYHORN_TEMP
OFFSET30=4210
TUNIT30='K'
COMMENT  Reference horn temperature, in K
TFORM31='1E'
TTYPE31='REFHORN_' / entire fieldname = REFHORN_TEMP
OFFSET31=4214
TUNIT31='K'
COMMENT  Dihedral mirror temperature, in K
TFORM32='1E'
TTYPE32='DIHEDRAL' / entire fieldname = DIHEDRAL_TEMP
OFFSET32=4218
TUNIT32='K'
COMMENT  Collimator mirror temperature, in K
TFORM33='1E'
TTYPE33='MIRROR_T' / entire fieldname = MIRROR_TEMP
OFFSET33=4222
TUNIT33='K'
COMMENT  Bolometer operating temperature, in K
TFORM34='1E'
TTYPE34='BOLOM_TE' / entire fieldname = BOLOM_TEMP
OFFSET34=4226
TUNIT34='K'
COMMENT  Bolometer bath temperature, in K
TFORM35='1E'
TTYPE35='BATH_TEM' / entire fieldname = BATH_TEMP
OFFSET35=4230
TUNIT35='K'
COMMENT 
END

--------------------------------------------------------------------------------

	Differential Sky Spectra

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'SKY-DIFF'           / Differential sky spectra
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LLSS'               / Channel and mirror transport mechanism scan
COMMENT                        / mode identifier.  The first two characters
COMMENT                        / indicate the channel, the first being the
COMMENT                        / instrument side: right (R) or left (L); and
COMMENT                        / the second being the frequency: high (H) or
COMMENT                        / low (L).  The third and fourth characters
COMMENT                        / indicate the scan mode, the third being the
COMMENT                        / scan length: short (S) or long (L); and the
COMMENT                        / fourth being the scan speed: slow (S) or 
COMMENT                        / fast (F).  In addition, the scan mode may
COMMENT                        / take the following values for low frequency
COMMENT                        / data only (channel = RL or LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points 
COMMENT                        / in GHz
NUM_FREQ=                   43 / Number of frequency points with good data
FFT_LENGTH=                640 / Length of Fast Fourier Transform used
END
COMMENT
TIMVERSN= 'OGIP/93-003'        / OGIP memo number where the convention
COMMENT                        / is described      
COMMENT    The times reported in this file are atomic seconds elapsed
COMMENT    since 00:00:00 UTC, 1 January 1981.  Time information is
COMMENT    recorded in a manner consistent with the convention specified
COMMENT    in OGIP/93-003 with the understanding that time is counted
COMMENT    in atomic seconds and the origin of time (MJDREF) is quoted
COMMENT    in ephemeris MJD.
TIMESYS = '1981.00'      / time system (same as IRAS)
MJDREFI =         44605  / Integer portion of ephemeris MJD
COMMENT                  / corresponding to 0h UTC 1 Jan 1981
MJDREFF = 0.00059240741  / Fractional portion of ephemeris MJD
COMMENT                  / corresponding to 0h UTC 1 Jan 1981
TIMEUNIT= 's      '      / unit for TSTART, TSTOP, TIMEZERO = seconds
TSTART  = 280713605.000  / observation start time in TIMESYS system
TSTOP   = 306806405.990  / observation stop time in TIMESYS system
COMMENT 
COMMENT 
COMMENT  FIRAS Spectrum
COMMENT  Project Dataset Record Structure 
COMMENT 
COMMENT 
COMMENT  Instrument Attitude Information
COMMENT 
COMMENT  FIRAS pixel number (resolution 6)
TFORM1='1J'
TTYPE1='PIXEL' / entire fieldname = PIXEL
OFFSET1=0
TUNIT1=' '
COMMENT  Galactic longitude, in deg (0 -> 360)
TFORM2='1E'
TTYPE2='GAL_LON' / entire fieldname = GAL_LON
OFFSET2=4
TUNIT2='deg'
COMMENT  Galactic latitude, in deg (-90 -> +90)
TFORM3='1E'
TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT
OFFSET3=8
TUNIT3='deg'
COMMENT  Ecliptic longitude, epoch 2000.0, in deg (0 -> 360)
TFORM4='1E'
TTYPE4='ECL_LON' / entire fieldname = ECL_LON
OFFSET4=12
TUNIT4='deg'
COMMENT  Ecliptic latitude, epoch 2000.0, in deg (-90 -> +90)
TFORM5='1E'
TTYPE5='ECL_LAT' / entire fieldname = ECL_LAT
OFFSET5=16
TUNIT5='deg'
COMMENT  Right ascension, in deg (0 -> 360)
TFORM6='1E'
TTYPE6='RA' / entire fieldname = RA
OFFSET6=20
TUNIT6='deg'
COMMENT  Declination, in deg (-90 -> +90)
TFORM7='1E'
TTYPE7='DEC' / entire fieldname = DEC
OFFSET7=24
TUNIT7='deg'
COMMENT 
COMMENT  Spectrum and Sigmas
COMMENT 
COMMENT  Real part of spectrum, in MJy/sr
TFORM8='210E'
TDIM8='(210)'
TTYPE8='REAL_SPE' / entire fieldname = REAL_SPECTRUM
OFFSET8=28
TUNIT8='MJy/sr'
COMMENT  Imaginary part of spectrum, in MJy/sr
TFORM9='210E'
TDIM9='(210)'
TTYPE9='IMAG_SPE' / entire fieldname = IMAG_SPECTRUM
OFFSET9=868
TUNIT9='MJy/sr'
COMMENT  Sigmas of spectrum, in MJy/sr
TFORM10='210E'
TDIM10='(210)'
TTYPE10='SIGMAS' / entire fieldname = SIGMAS
OFFSET10=1708
TUNIT10='MJy/sr'
COMMENT  
COMMENT  Number and Times of IFGs
COMMENT 
COMMENT  Number of IFGs in spectrum
TFORM11='1J'
TTYPE11='NUM_IFGS' / entire fieldname = NUM_IFGS
OFFSET11=2548
TUNIT11=' '
COMMENT  Glitch rate for spectrum, in glitches/s
TFORM12='1E'
TTYPE12='GLITCH_R' / entire fieldname = GLITCH_RATE
OFFSET12=2552
TUNIT12='gl/s'
COMMENT  Glitch rate weighted number of IFGs in spectrum
TFORM13='1E'
TTYPE13='ADJ_NUM_' / entire fieldname = ADJ_NUM_IFGS
OFFSET13=2556
TUNIT13=' '
COMMENT  Average data collection time in seconds since
COMMENT     00:00.00 UTC, 1 January 1981
TFORM14='1D'
TTYPE14='TIME' / entire fieldname = TIME
OFFSET14=2560
TUNIT14='s'
COMMENT  Observation times of IFGs in the spectrum; 
COMMENT     in hundredths of days since ejection of the 
COMMENT     FIRAS aperture cover at
COMMENT     11:18.00 UTC, 21 November 1989
TFORM15='100J'
TDIM15='(100)'
TTYPE15='IFG_TIME' / entire fieldname = IFG_TIMES
OFFSET15=2568
TUNIT15='d*100'
COMMENT  Flag indicating orphan IFGs, which occur 
COMMENT     when a spectrum is composed of only 1 or 
COMMENT     2 IFGs.  In all other cases, the spectrum
COMMENT     is composed of three or more IFGs;
COMMENT     applicable only to sky data.
COMMENT     Flag = 1 indicates 1 or 2 IFGS in the spectrum;
COMMENT     flag = 0 indicates 3 or more IFGs in the spectrum.
TFORM16='1B'
TTYPE16='ORPHANS' / entire fieldname = ORPHANS
OFFSET16=2968
TUNIT16=' '
COMMENT 
COMMENT  Template Information
COMMENT 
COMMENT  Number of templates subtracted from spectrum
TFORM17='1J'
TTYPE17='NUM_TEMP' / entire fieldname = NUM_TEMPLATES
OFFSET17=2969
TUNIT17=' '
COMMENT  Number of IFGS used in forming the templates
TFORM18='1J'
TTYPE18='TPL_NUM_' / entire fieldname = TPL_NUM_IFGS
OFFSET18=2973
TUNIT18=' '
COMMENT  Flag indicating use of IFGs from neighboring
COMMENT     pixels in template formation (suitable
COMMENT     IFGs from 8 neighboring pixels);
COMMENT     applicable only to sky data.
COMMENT     Flag = 1 indicates neighbor IFGs were used;
COMMENT     flag = 0 indicates neighbor IFGs were not used.
TFORM19='1B'
TTYPE19='NEIGHBOR' / entire fieldname = NEIGHBORS
OFFSET19=2977
TUNIT19=' '
COMMENT  Number of IFGS from neighboring pixels used in
COMMENT     forming the templates; only for sky data
TFORM20='1J'
TTYPE20='NBR_NUM_' / entire fieldname = NBR_NUM_IFGS
OFFSET20=2978
TUNIT20=' '
COMMENT  Observation times of IFGs used in template 
COMMENT     formation; in seconds since
COMMENT     00:00.00 UTC, 1 January 1981
TFORM21='100D'
TDIM21='(100)'
TTYPE21='TPL_TIME' / entire fieldname = TPL_TIMES
OFFSET21=2982
TUNIT21='s'
COMMENT  Pixel numbers of IFGs used in templates
TFORM22='100J'
TDIM22='(100)'
TTYPE22='TPL_PIXE' / entire fieldname = TPL_PIXELS
OFFSET22=3782
TUNIT22=' '
COMMENT 
COMMENT   Bolometer Response Function
COMMENT 
COMMENT  Commanded bolometer bias, in V
TFORM23='1E'
TTYPE23='BOLOM_BI' / entire fieldname = BOLOM_BIAS
OFFSET23=4182
TUNIT23='V'
COMMENT  Bolometer readout voltage, in V
TFORM24='1E'
TTYPE24='BOLOM_VO' / entire fieldname = BOLOM_VOLTAGE
OFFSET24=4186
TUNIT24='V'
COMMENT  Bolometer DC response, in V/W
TFORM25='1E'
TTYPE25='DC_RESPO' / entire fieldname = DC_RESPONSE
OFFSET25=4190
TUNIT25='V/W'
COMMENT  Bolometer time constant, in s
TFORM26='1E'
TTYPE26='TIME_CON' / entire fieldname = TIME_CONSTANT
OFFSET26=4194
TUNIT26='s'
COMMENT  Linear autophase correction, in rad
TFORM27='1E'
TTYPE27='PHASE_CO' / entire fieldname = PHASE_CORR
OFFSET27=4198
TUNIT27='rad'
COMMENT 
COMMENT  Instrument Temperatures
COMMENT 
COMMENT  External calibrator temperature, in K
TFORM28='1E'
TTYPE28='XCAL_TEM' / entire fieldname = XCAL_TEMP
OFFSET28=4202
TUNIT28='K'
COMMENT  Internal calibrator temperature, in K
TFORM29='1E'
TTYPE29='ICAL_TEM' / entire fieldname = ICAL_TEMP
OFFSET29=4206
TUNIT29='K'
COMMENT  Sky horn temperature, in K
TFORM30='1E'
TTYPE30='SKYHORN_' / entire fieldname = SKYHORN_TEMP
OFFSET30=4210
TUNIT30='K'
COMMENT  Reference horn temperature, in K
TFORM31='1E'
TTYPE31='REFHORN_' / entire fieldname = REFHORN_TEMP
OFFSET31=4214
TUNIT31='K'
COMMENT  Dihedral mirror temperature, in K
TFORM32='1E'
TTYPE32='DIHEDRAL' / entire fieldname = DIHEDRAL_TEMP
OFFSET32=4218
TUNIT32='K'
COMMENT  Collimator mirror temperature, in K
TFORM33='1E'
TTYPE33='MIRROR_T' / entire fieldname = MIRROR_TEMP
OFFSET33=4222
TUNIT33='K'
COMMENT  Bolometer operating temperature, in K
TFORM34='1E'
TTYPE34='BOLOM_TE' / entire fieldname = BOLOM_TEMP
OFFSET34=4226
TUNIT34='K'
COMMENT  Bolometer bath temperature, in K
TFORM35='1E'
TTYPE35='BATH_TEM' / entire fieldname = BATH_TEMP
OFFSET35=4230
TUNIT35='K'
COMMENT 
END

--------------------------------------------------------------------------------

	Destriped Sky Spectra

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'SKY-DEST'           / Destriped sky spectra
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LOWF'               / Field indicating combination of data from
COMMENT                        / various channels and mirror transport 
COMMENT                        / mechanism scan modes.  LOWF is a combination
COMMENT                        / of the low frequency RLSS, RLFS, RLFL, LLSS, 
COMMENT                        / LLFS, and LLFL data.  HIGH is a combination of
COMMENT                        / the high frequency RHSS, RHSF, RHLF, LHSS, 
COMMENT                        / LHSF, and LHLF data.  HIF2, HIF3, and HIF4 
COMMENT                        / divide the HIGH data into three frequency 
COMMENT                        / bands, as indicated by the NU_ZERO and 
COMMENT                        / NUM_FREQ fields.  HRES is a combination of the
COMMENT                        / high resolution RLLF and LLLF data.  For the 
COMMENT                        / uncombined channel/scan mode labels, the first
COMMENT                        / two characters of the label indicate the 
COMMENT                        / channel, the first being the instrument side: 
COMMENT                        / right (R) or left (L); and the second being 
COMMENT                        / the frequency:  high (H) or low (L).  The 
COMMENT                        / third and fourth characters indicate the scan 
COMMENT                        / mode, the third being the scan length:  short 
COMMENT                        / (S) or long (L); and the fourth being the scan
COMMENT                        / speed:  slow (S) or fast (F).  In addition, 
COMMENT                        / the scan mode may take the following values 
COMMENT                        / for low frequency data only (channel = RL or 
COMMENT                        / LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points
COMMENT                        / in GHz
NUM_FREQ=                   43 / Number of frequency points with good data
END
COMMENT 
COMMENT 
COMMENT  FIRAS Destriped Sky Spectrum
COMMENT  Project Dataset Record Structure 
COMMENT 
COMMENT 
COMMENT  FIRAS pixel number (resolution 6)
TFORM1='1J'
TTYPE1='PIXEL' / entire fieldname = PIXEL
OFFSET1=0
TUNIT1=' '
COMMENT  Galactic longitude, in deg (0 -> 360)
TFORM2='1E'
TTYPE2='GAL_LON' / entire fieldname = GAL_LON
OFFSET2=4
TUNIT2='deg'
COMMENT  Galactic latitude, in deg (-90 -> 90)
TFORM3='1E'
TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT
OFFSET3=8
TUNIT3='deg'
COMMENT  Pixel weight
TFORM4='1E'
TTYPE4='WEIGHT' / entire fieldname = WEIGHT
OFFSET4=12
TUNIT4=' '
COMMENT  Flag indicating whether or not the
COMMENT     calibrated spectra in this pixel
COMMENT     were used for destriping:
COMMENT     1 = spectra were used;
COMMENT     0 = spectra were not used.
TFORM5='1B'
TTYPE5='STR_USED' / entire fieldname = STR_USED
OFFSET5=16
TUNIT5=' '
COMMENT  Destriped spectrum, in MJy/sr
TFORM6='182E'
TDIM6='(182)'
TTYPE6='SPECTRUM' / entire fieldname = SPECTRUM
OFFSET6=17
TUNIT6='MJy/sr'
COMMENT 
END

--------------------------------------------------------------------------------

        Coadd-Based Zodiacal Light Model

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'COADD-ZM'           / Coadd-based zodiacal light model
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'HIGH'               / Field indicating combination of data from
COMMENT                        / various channels and mirror transport 
COMMENT                        / mechanism scan modes.  HIGH is a combination 
COMMENT                        / of the high frequency RHSS, RHSF, RHLF, LHSS, 
COMMENT                        / LHSF, and LHLF data.  For the uncombined 
COMMENT                        / channel/scan mode labels, the first two 
COMMENT                        / characters of the label indicate the channel, 
COMMENT                        / the first being the instrument side:  
COMMENT                        / right (R) or left (L); and the second being 
COMMENT                        / the frequency:  high (H) or low (L).  The 
COMMENT                        / third and fourth characters indicate the scan 
COMMENT                        / mode, the third being the scan length:  short 
COMMENT                        / (S) or long (L); and the fourth being the scan
COMMENT                        / speed:  slow (S) or fast (F).
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
END
COMMENT 
COMMENT 
COMMENT  FIRAS Coadd Zodi Model
COMMENT  Project Dataset Record Structure
COMMENT 
COMMENT 
COMMENT  FIRAS pixel number (resolution 6)
TFORM1='1J'
TTYPE1='PIXEL' / entire fieldname = PIXEL
OFFSET1=0
TUNIT1=' '
COMMENT  Field indicating the channel and
COMMENT     scan mode of the coadded sky
COMMENT     interferogram corresponding to
COMMENT     this zodi model spectrum;
COMMENT     together with REC_NUM, establishes
COMMENT     a correspondence between the
COMMENT     coadded sky interferograms (or
COMMENT     calibrated sky spectra) and 
COMMENT     the zodi model spectra.
TFORM2='4A'
TTYPE2='CHANSCAN' / entire fieldname = CHANSCAN
OFFSET2=4
TUNIT2=' '
COMMENT  Field indicating the record number
COMMENT     of the coadded sky interferogram
COMMENT     corresponding to this zodi model
COMMENT     spectrum; together with CHANSCAN,
COMMENT     establishes a correspondence between 
COMMENT     the coadded sky interferograms (or
COMMENT     calibrated sky spectra) and 
COMMENT     the zodi model spectra.
TFORM3='1J'
TTYPE3='REC_NUM' / entire fieldname = REC_NUM
OFFSET3=8
TUNIT3=' '
COMMENT  Pixel weight
TFORM4='1E'
TTYPE4='WEIGHT' / entire fieldname = WEIGHT
OFFSET4=12
TUNIT4=' '
COMMENT  Zodi model spectrum, in MJy/sr
TFORM5='170E'
TDIM5='(170)'
TTYPE5='ZODI_MOD' / entire fieldname = ZODI_MOD
OFFSET5=16
TUNIT5='MJy/sr'
COMMENT 
END

--------------------------------------------------------------------------------

        Pixel-Based Zodiacal Light Model

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'PIXEL-ZM'           / Pixel-based zodiacal light model
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'HIGH'               / Field indicating combination of data from
COMMENT                        / various channels and mirror transport 
COMMENT                        / mechanism scan modes.  HIGH is a combination 
COMMENT                        / of the high frequency RHSS, RHSF, RHLF, LHSS, 
COMMENT                        / LHSF, and LHLF data.  For the uncombined 
COMMENT                        / channel/scan mode labels, the first two 
COMMENT                        / characters of the label indicate the channel, 
COMMENT                        / the first being the instrument side:  
COMMENT                        / right (R) or left (L); and the second being 
COMMENT                        / the frequency:  high (H) or low (L).  The 
COMMENT                        / third and fourth characters indicate the scan 
COMMENT                        / mode, the third being the scan length:  short 
COMMENT                        / (S) or long (L); and the fourth being the scan
COMMENT                        / speed:  slow (S) or fast (F).
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
END
COMMENT 
COMMENT 
COMMENT  FIRAS Pixel Zodi Model
COMMENT  Project Dataset Record Structure
COMMENT 
COMMENT 
COMMENT  FIRAS pixel number (resolution 6)
TFORM1='1J'
TTYPE1='PIXEL' / entire fieldname = PIXEL
OFFSET1=0
TUNIT1=' '
COMMENT  Galactic longitude, in deg (0 -> 360)
TFORM2='1E'
TTYPE2='GAL_LON' / entire fieldname = GAL_LON
OFFSET2=4
TUNIT2='deg'
COMMENT  Galactic latitude, in deg (-90 -> 90)
TFORM3='1E'
TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT
OFFSET3=8
TUNIT3='deg'
COMMENT  Zodi model spectrum, in MJy/sr
TFORM4='170E'
TDIM4='(170)'
TTYPE4='ZODI_MOD' / entire fieldname = ZODI_MOD
OFFSET4=12
TUNIT4='MJy/sr'
COMMENT 
END

--------------------------------------------------------------------------------

        DIRBE Gradient Kernel

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'DIRBE-GK'           / DIRBE gradient kernel
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LOWF'               / Field indicating combination of data from
COMMENT                        / various channels and mirror transport 
COMMENT                        / mechanism scan modes.  LOWF is a combination
COMMENT                        / of the low frequency RLSS, RLFS, RLFL, LLSS, 
COMMENT                        / LLFS, and LLFL data.  HIGH is a combination of
COMMENT                        / the high frequency RHSS, RHSF, RHLF, LHSS, 
COMMENT                        / LHSF, and LHLF data.  HRES is a combination of
COMMENT                        / the high resolution RLLF and LLLF data.  For 
COMMENT                        / the uncombined channel/scan mode labels, the 
COMMENT                        / first two characters of the label indicate the 
COMMENT                        / channel, the first being the instrument side: 
COMMENT                        / right (R) or left (L); and the second being 
COMMENT                        / the frequency:  high (H) or low (L).  The 
COMMENT                        / third and fourth characters indicate the scan 
COMMENT                        / mode, the third being the scan length:  short 
COMMENT                        / (S) or long (L); and the fourth being the scan
COMMENT                        / speed:  slow (S) or fast (F).  In addition, 
COMMENT                        / the scan mode may take the following values 
COMMENT                        / for low frequency data only (channel = RL or 
COMMENT                        / LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
END
COMMENT 
COMMENT 
COMMENT  FIRAS DIRBE Gradient Kernel
COMMENT  Project Dataset Record Structure
COMMENT 
COMMENT 
COMMENT  FIRAS pixel number (resolution 6)
TFORM1='1J'
TTYPE1='PIXEL' / entire fieldname = PIXEL
OFFSET1=0
TUNIT1=' '
COMMENT  Field indicating the channel and
COMMENT     scan mode of the coadded sky
COMMENT     interferogram corresponding to
COMMENT     these DIRBE values; together 
COMMENT     with REC_NUM, establishes a 
COMMENT     correspondence between the
COMMENT     coadded sky interferograms (or
COMMENT     calibrated sky spectra) and 
COMMENT     the DIRBE values.
TFORM2='4A'
TTYPE2='CHANSCAN' / entire fieldname = CHANSCAN
OFFSET2=4
TUNIT2=' '
COMMENT  Field indicating the record number
COMMENT     of the coadded sky interferogram
COMMENT     corresponding to these DIRBE values;
COMMENT     together with CHANSCAN, establishes 
COMMENT     a correspondence between the coadded 
COMMENT     sky interferograms (or calibrated 
COMMENT     sky spectra) and the DIRBE values.
TFORM3='1J'
TTYPE3='REC_NUM' / entire fieldname = REC_NUM
OFFSET3=8
TUNIT3=' '
COMMENT  Pixel weight
TFORM4='1E'
TTYPE4='WEIGHT' / entire fieldname = WEIGHT
OFFSET4=12
TUNIT4=' '
COMMENT  DIRBE band 8 gradient kernel
TFORM5='1E'
TTYPE5='BAND_8' / entire fieldname = BAND_8
OFFSET5=16
TUNIT5=' '
COMMENT  DIRBE band 9 gradient kernel
TFORM6='1E'
TTYPE6='BAND_9' / entire fieldname = BAND_9
OFFSET6=20
TUNIT6=' '
COMMENT  DIRBE band 10 gradient kernel
TFORM7='1E'
TTYPE7='BAND_10' / entire fieldname = BAND_10
OFFSET7=24
TUNIT7=' '
COMMENT 
END

--------------------------------------------------------------------------------

        Physical Stripes

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'PHYS-ST'            / Physical stripes
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LOWF'               / Field indicating combination of data from
COMMENT                        / various channels and mirror transport 
COMMENT                        / mechanism scan modes.  LOWF is a combination
COMMENT                        / of the low frequency RLSS, RLFS, RLFL, LLSS, 
COMMENT                        / LLFS, and LLFL data.  HIGH is a combination of
COMMENT                        / the high frequency RHSS, RHSF, RHLF, LHSS, 
COMMENT                        / LHSF, and LHLF data.  HIF2, HIF3, and HIF4 
COMMENT                        / divide the HIGH data into three frequency 
COMMENT                        / bands, as indicated by the NU_ZERO and 
COMMENT                        / NUM_FREQ fields.  HRES is a combination of the
COMMENT                        / high resolution RLLF and LLLF data.  For the 
COMMENT                        / uncombined channel/scan mode labels, the first
COMMENT                        / two characters of the label indicate the 
COMMENT                        / channel, the first being the instrument side: 
COMMENT                        / right (R) or left (L); and the second being 
COMMENT                        / the frequency:  high (H) or low (L).  The 
COMMENT                        / third and fourth characters indicate the scan 
COMMENT                        / mode, the third being the scan length:  short 
COMMENT                        / (S) or long (L); and the fourth being the scan
COMMENT                        / speed:  slow (S) or fast (F).  In addition, 
COMMENT                        / the scan mode may take the following values 
COMMENT                        / for low frequency data only (channel = RL or 
COMMENT                        / LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points
COMMENT                        / in GHz
NUM_FREQ=                   43 / Number of frequency points with good data
END
COMMENT 
COMMENT 
COMMENT  FIRAS Physical Stripe 
COMMENT  Project Dataset Record Structure 
COMMENT 
COMMENT 
COMMENT  Stripe identifier
TFORM1='40A'
TTYPE1='STR_ID' / entire fieldname = STR_ID
OFFSET1=0
TUNIT1=' '
COMMENT  Stripe spectrum, in MJy/sr
TFORM2='182E'
TDIM2='(182)'
TTYPE2='STR_SPEC' / entire fieldname = STR_SPEC
OFFSET2=40
TUNIT2='MJy/sr'
COMMENT  Stripe rect array (dimensionless)
TFORM3='6144E'
TDIM3='(6144)'
TTYPE3='STR_RECT' / entire fieldname = STR_RECT
OFFSET3=768
TUNIT3=' '
COMMENT  Stripe covariance (dimensionless)
TFORM4='30E'
TDIM4='(30)'
TTYPE4='STR_COVR' / entire fieldname = STR_COVR
OFFSET4=25344
TUNIT4=' '
COMMENT 
END

--------------------------------------------------------------------------------

        Orthogonal Stripes

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'ORTHO-ST'           / Orthogonal stripes
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LOWF'               / Field indicating combination of data from
COMMENT                        / various channels and mirror transport 
COMMENT                        / mechanism scan modes.  LOWF is a combination
COMMENT                        / of the low frequency RLSS, RLFS, RLFL, LLSS, 
COMMENT                        / LLFS, and LLFL data.  HIGH is a combination of
COMMENT                        / the high frequency RHSS, RHSF, RHLF, LHSS, 
COMMENT                        / LHSF, and LHLF data.  HIF2, HIF3, and HIF4 
COMMENT                        / divide the HIGH data into three frequency 
COMMENT                        / bands, as indicated by the NU_ZERO and 
COMMENT                        / NUM_FREQ fields.  HRES is a combination of the
COMMENT                        / high resolution RLLF and LLLF data.  For the 
COMMENT                        / uncombined channel/scan mode labels, the first
COMMENT                        / two characters of the label indicate the 
COMMENT                        / channel, the first being the instrument side: 
COMMENT                        / right (R) or left (L); and the second being 
COMMENT                        / the frequency:  high (H) or low (L).  The 
COMMENT                        / third and fourth characters indicate the scan 
COMMENT                        / mode, the third being the scan length:  short 
COMMENT                        / (S) or long (L); and the fourth being the scan
COMMENT                        / speed:  slow (S) or fast (F).  In addition, 
COMMENT                        / the scan mode may take the following values 
COMMENT                        / for low frequency data only (channel = RL or 
COMMENT                        / LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points
COMMENT                        / in GHz
NUM_FREQ=                   43 / Number of frequency points with good data
END
COMMENT 
COMMENT 
COMMENT  FIRAS Orthogonal Stripe
COMMENT  Project Dataset Record Structure 
COMMENT 
COMMENT 
COMMENT  Stripe gammas, in MJy/sr
TFORM1='182E'
TDIM1='(182)'
TTYPE1='STR_GAMA' / entire fieldname = STR_GAMA
OFFSET1=0
TUNIT1='MJy/sr'
COMMENT  Stripe betas (dimensionless)
TFORM2='6144E'
TDIM2='(6144)'
TTYPE2='STR_BETA' / entire fieldname = STR_BETA
OFFSET2=728
TUNIT2=' '
COMMENT 
END

--------------------------------------------------------------------------------

        C Vector

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'C-VEC'              / C vector
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LOWF'               / Field indicating combination of data from
COMMENT                        / various channels and mirror transport 
COMMENT                        / mechanism scan modes.  LOWF is a combination
COMMENT                        / of the low frequency RLSS, RLFS, RLFL, LLSS, 
COMMENT                        / LLFS, and LLFL data.  HIGH is a combination of
COMMENT                        / the high frequency RHSS, RHSF, RHLF, LHSS, 
COMMENT                        / LHSF, and LHLF data.  HIF2, HIF3, and HIF4 
COMMENT                        / divide the HIGH data into three frequency 
COMMENT                        / bands, as indicated by the NU_ZERO and 
COMMENT                        / NUM_FREQ fields.  HRES is a combination of the
COMMENT                        / high resolution RLLF and LLLF data.  For the 
COMMENT                        / uncombined channel/scan mode labels, the first
COMMENT                        / two characters of the label indicate the 
COMMENT                        / channel, the first being the instrument side: 
COMMENT                        / right (R) or left (L); and the second being 
COMMENT                        / the frequency:  high (H) or low (L).  The 
COMMENT                        / third and fourth characters indicate the scan 
COMMENT                        / mode, the third being the scan length:  short 
COMMENT                        / (S) or long (L); and the fourth being the scan
COMMENT                        / speed:  slow (S) or fast (F).  In addition, 
COMMENT                        / the scan mode may take the following values 
COMMENT                        / for low frequency data only (channel = RL or 
COMMENT                        / LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points
COMMENT                        / in GHz
NUM_FREQ=                   43 / Number of frequency points with good data
GALATEXC=                   15 / Absolute value of galactic latitude in degrees
COMMENT                        / below which input data was excluded in 
COMMENT                        / producing this dataset
END
COMMENT 
COMMENT 
COMMENT  FIRAS C Vector
COMMENT  Project Dataset Record Structure 
COMMENT 
COMMENT 
COMMENT  C vector, in MJy/sr
TFORM1='182E'
TDIM1='(182)'
TTYPE1='C_VECTOR' / entire fieldname = C_VECTOR
OFFSET1=0
TUNIT1='MJy/sr'
COMMENT 
END

--------------------------------------------------------------------------------

        A Vector

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'A-VEC'              / A vector
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LOWF'               / Field indicating combination of data from
COMMENT                        / various channels and mirror transport 
COMMENT                        / mechanism scan modes.  LOWF is a combination
COMMENT                        / of the low frequency RLSS, RLFS, RLFL, LLSS, 
COMMENT                        / LLFS, and LLFL data.  HIGH is a combination of
COMMENT                        / the high frequency RHSS, RHSF, RHLF, LHSS, 
COMMENT                        / LHSF, and LHLF data.  HIF2, HIF3, and HIF4 
COMMENT                        / divide the HIGH data into three frequency 
COMMENT                        / bands:  HIF2 from 612.18729 to 1346.8120 GHz,
COMMENT                        / HIF3 from 1360.4162 to 2095.0410 GHz, and
COMMENT                        / HIF4 from 2108.6451 to 2911.2907 GHz.  HRES is
COMMENT                        / a combination of the high resolution RLLF and 
COMMENT                        / LLLF data.  For the uncombined channel/scan 
COMMENT                        / mode labels, the first two characters of the 
COMMENT                        / label indicate the channel, the first being 
COMMENT                        / the instrument side:  right (R) or left (L); 
COMMENT                        / and the second being the frequency:  high (H)
COMMENT                        / or low (L).  The third and fourth characters 
COMMENT                        / indicate the scan mode, the third being the 
COMMENT                        / scan length:  short (S) or long (L); and the 
COMMENT                        / fourth being the scan speed:  slow (S) or fast
COMMENT                        / (F).  In addition, the scan mode may take the 
COMMENT                        / following values for low frequency data only 
COMMENT                        / (channel = RL or LL):  
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =                  0.0 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points
COMMENT                        / in GHz
NUM_FREQ=                   32 / Number of frequency points with good data
GALATEXC=                   15 / Absolute value of galactic latitude in degrees
COMMENT                        / below which input data was excluded in 
COMMENT                        / producing this dataset
END
COMMENT 
COMMENT 
COMMENT  FIRAS A Vector
COMMENT  Project Dataset Record Structure
COMMENT 
COMMENT 
COMMENT  A vector, in MJy/sr
TFORM1='32E'
TDIM1='(32)'
TTYPE1='A_VECTOR' / entire fieldname = A_VECTOR
OFFSET1=0
TUNIT1='MJy/sr'
COMMENT 
END

--------------------------------------------------------------------------------

        Covariance Matrix

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'COV-MAT'            / Covariance matrix
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LOWF'               / Field indicating combination of data from
COMMENT                        / various channels and mirror transport 
COMMENT                        / mechanism scan modes.  LOWF is a combination
COMMENT                        / of the low frequency RLSS, RLFS, RLFL, LLSS, 
COMMENT                        / LLFS, and LLFL data.  HIGH is a combination of
COMMENT                        / the high frequency RHSS, RHSF, RHLF, LHSS, 
COMMENT                        / LHSF, and LHLF data.  HIF2, HIF3, and HIF4 
COMMENT                        / divide the HIGH data into three frequency 
COMMENT                        / bands, as indicated by the NU_ZERO and 
COMMENT                        / NUM_FREQ fields.  HRES is a combination of the
COMMENT                        / high resolution RLLF and LLLF data.  For the 
COMMENT                        / uncombined channel/scan mode labels, the first
COMMENT                        / two characters of the label indicate the 
COMMENT                        / channel, the first being the instrument side: 
COMMENT                        / right (R) or left (L); and the second being 
COMMENT                        / the frequency:  high (H) or low (L).  The 
COMMENT                        / third and fourth characters indicate the scan 
COMMENT                        / mode, the third being the scan length:  short 
COMMENT                        / (S) or long (L); and the fourth being the scan
COMMENT                        / speed:  slow (S) or fast (F).  In addition, 
COMMENT                        / the scan mode may take the following values 
COMMENT                        / for low frequency data only (channel = RL or 
COMMENT                        / LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points
COMMENT                        / in GHz
NUM_FREQ=                   43 / Number of frequency points with good data
GALATEXC=                   15 / Absolute value of galactic latitude in degrees
COMMENT                        / below which input data was excluded in 
COMMENT                        / producing this dataset
END
COMMENT 
COMMENT 
COMMENT  FIRAS Covariance Matrix 
COMMENT  Project Dataset Record Structure
COMMENT 
COMMENT 
COMMENT  Row number of covariance matrix
TFORM1='1I'
TTYPE1='ROW_NUM' / entire fieldname = ROW_NUM
OFFSET1=0
TUNIT1=' '
COMMENT  Row of covariance matrix, in (MJy/sr)^2
TFORM2='182E'
TDIM2='(182)'
TTYPE2='ROW_COVR' / entire fieldname = ROW_COVR
OFFSET2=2
TUNIT2='(MJy/sr)^2'
COMMENT 
END

--------------------------------------------------------------------------------

        Chi-Squared

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'CHI-SQ'             / Chi-squared
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LOWF'               / Field indicating combination of data from
COMMENT                        / various channels and mirror transport 
COMMENT                        / mechanism scan modes.  LOWF is a combination
COMMENT                        / of the low frequency RLSS, RLFS, RLFL, LLSS, 
COMMENT                        / LLFS, and LLFL data.  HIGH is a combination of
COMMENT                        / the high frequency RHSS, RHSF, RHLF, LHSS, 
COMMENT                        / LHSF, and LHLF data.  HIF2, HIF3, and HIF4 
COMMENT                        / divide the HIGH data into three frequency 
COMMENT                        / bands, as indicated by the NU_ZERO and 
COMMENT                        / NUM_FREQ fields.  HRES is a combination of the
COMMENT                        / high resolution RLLF and LLLF data.  For the 
COMMENT                        / uncombined channel/scan mode labels, the first
COMMENT                        / two characters of the label indicate the 
COMMENT                        / channel, the first being the instrument side: 
COMMENT                        / right (R) or left (L); and the second being 
COMMENT                        / the frequency:  high (H) or low (L).  The 
COMMENT                        / third and fourth characters indicate the scan 
COMMENT                        / mode, the third being the scan length:  short 
COMMENT                        / (S) or long (L); and the fourth being the scan
COMMENT                        / speed:  slow (S) or fast (F).  In addition, 
COMMENT                        / the scan mode may take the following values 
COMMENT                        / for low frequency data only (channel = RL or 
COMMENT                        / LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
END
COMMENT 
COMMENT 
COMMENT  FIRAS Chi-Squared 
COMMENT  Project Dataset Record Structure 
COMMENT 
COMMENT 
COMMENT  FIRAS pixel number (resolution 6)
TFORM1='1J'
TTYPE1='PIXEL' / entire fieldname = PIXEL
OFFSET1=0
TUNIT1=' '
COMMENT  Galactic longitude, in deg (0 -> 360)
TFORM2='1E'
TTYPE2='GAL_LON' / entire fieldname = GAL_LON
OFFSET2=4
TUNIT2='deg'
COMMENT  Galactic latitude, in deg (-90 -> 90)
TFORM3='1E'
TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT
OFFSET3=8
TUNIT3='deg'
COMMENT  Pixel weight
TFORM4='1E'
TTYPE4='WEIGHT' / entire fieldname = WEIGHT
OFFSET4=12
TUNIT4=' '
COMMENT  Degrees of freedom
TFORM5='1J'
TTYPE5='DOF' / entire fieldname = DOF
OFFSET5=16
TUNIT5=' '
COMMENT  Chi-squared
TFORM6='1E'
TTYPE6='COMB_CSQ' / entire fieldname = COMB_CSQ
OFFSET6=20
TUNIT6=' '
COMMENT 
END

--------------------------------------------------------------------------------

	Calibration Model Solution

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'CAL-MOD'            / Calibration model solution
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT
COMMENT   FIRAS specific keywords
CHANSCAN= 'LLSS'               / Channel and mirror transport mechanism scan
COMMENT                        / mode identifier.  The first two characters
COMMENT                        / indicate the channel, the first being the
COMMENT                        / instrument side: right (R) or left (L); and
COMMENT                        / the second being the frequency: high (H) or
COMMENT                        / low (L).  The third and fourth characters
COMMENT                        / indicate the scan mode, the third being the
COMMENT                        / scan length: short (S) or long (L); and the
COMMENT                        / fourth being the scan speed: slow (S) or 
COMMENT                        / fast (F).  In addition, the scan mode may
COMMENT                        / take the following values for low frequency
COMMENT                        / data only (channel = RL or LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
COMMENT                        / The scan mode value FA indicates: for high
COMMENT                        / frequency data (channel = RH or LH), a
COMMENT                        / combination of SF and LF data; and for low
COMMENT                        / frequency data (channel = RL or LL), a
COMMENT                        / combination of FS and FL data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points 
COMMENT                        / in GHz
OM_ZERO =            11.149872 / Audio frequency of initial data point in rad/s
DELTA_OM=            2.2299744 / Audio frequency interval between data points 
COMMENT                        / in rad/s
NUM_FREQ=                   43 / Number of frequency points with good data
NORMALIZ=         7.479336E 08 / Instrumental gain function normalization,
COMMENT                        / in (MJy*V)/(W*sr)
END
COMMENT 
COMMENT 
COMMENT  FIRAS Calibration Model Solution
COMMENT  Project Dataset Record Structure
COMMENT 
COMMENT 
COMMENT  Electronics Gain Function
COMMENT 
COMMENT  Real part of electronics gain function (dimensionless)
TFORM1='210E'
TDIM1='(210)'
TTYPE1='RELEX_GA' / entire fieldname = RELEX_GAIN
OFFSET1=0
TUNIT1=' '
COMMENT  Imaginary part of electronics gain function (dimensionless)
TFORM2='210E'
TDIM2='(210)'
TTYPE2='IELEX_GA' / entire fieldname = IELEX_GAIN
OFFSET2=840
TUNIT2=' '
COMMENT 
COMMENT  Optical Transfer Function
COMMENT 
COMMENT  Real part of optical transfer function (dimensionless)
TFORM3='210E'
TDIM3='(210)'
TTYPE3='RTRANSFE' / entire fieldname = RTRANSFER
OFFSET3=1680
TUNIT3=' '
COMMENT  Imaginary part of optical transfer function (dimensionless)
TFORM4='210E'
TDIM4='(210)'
TTYPE4='ITRANSFE' / entire fieldname = ITRANSFER
OFFSET4=2520
TUNIT4=' '
COMMENT 
COMMENT  Bolometer Response Function 
COMMENT     (for the mission average bolometer state;
COMMENT      response function = (1 + iwT)/S0, where
COMMENT      T is the time constant and
COMMENT      S0 is the DC response)
COMMENT 
COMMENT  Bolometer time constant, in s
TFORM5='1E'
TTYPE5='TIME_CON' / entire fieldname = TIME_CONSTANT
OFFSET5=3360
TUNIT5='s'
COMMENT  Bolometer DC response, in V/W
TFORM6='1E'
TTYPE6='DC_RESPO' / entire fieldname = DC_RESPONSE
OFFSET6=3364
TUNIT6='V/W'
COMMENT 
COMMENT  Apodization Function
COMMENT     (applied to interferograms in the time domain 
COMMENT      prior to Fourier transformation)
COMMENT 
COMMENT  Apodization function (dimensionless)
TFORM7='512E'
TDIM7='(512)'
TTYPE7='APODIZAT' / entire fieldname = APODIZATION
OFFSET7=3368
TUNIT7=' '
COMMENT 
COMMENT  Bolometer Model Parameters
COMMENT 
COMMENT  Characteristic resistance, in ohms
TFORM8='1E'
TTYPE8='BOLPARM_' / entire fieldname = BOLPARM_R0
OFFSET8=5416
TUNIT8='ohm'
COMMENT  Characteristic temperature, in K
TFORM9='1E'
TTYPE9='BOLPARM2' / entire fieldname = BOLPARM_T0
OFFSET9=5420
TUNIT9='K'
COMMENT  Coefficient of thermal conductance, in W/K^(bolparm_beta+1)
TFORM10='1E'
TTYPE10='BOLPARM3' / entire fieldname = BOLPARM_G1
OFFSET10=5424
TUNIT10='W/K^(bolparm_beta+1)'
COMMENT  Index of thermal conductance (dimensionless)
TFORM11='1E'
TTYPE11='BOLPARM4' / entire fieldname = BOLPARM_BETA
OFFSET11=5428
TUNIT11=' '
COMMENT  Resistance due to electric field, in K/V
TFORM12='1E'
TTYPE12='BOLPARM5' / entire fieldname = BOLPARM_RHO
OFFSET12=5432
TUNIT12='K/V'
COMMENT  Heat capacity coefficient for linear temperature term, in J/K^2
TFORM13='1E'
TTYPE13='BOLPARM6' / entire fieldname = BOLPARM_C1
OFFSET13=5436
TUNIT13='J/K^2'
COMMENT  Heat capacity coefficient for cubic temperature term, in J/K^4
TFORM14='1E'
TTYPE14='BOLPARM7' / entire fieldname = BOLPARM_C3
OFFSET14=5440
TUNIT14='J/K^4'
COMMENT  Readout JFET offset, in V
TFORM15='1E'
TTYPE15='BOLPARM8' / entire fieldname = BOLPARM_JO
OFFSET15=5444
TUNIT15='V'
COMMENT  Readout JFET gain (dimensionless)
TFORM16='1E'
TTYPE16='BOLPARM9' / entire fieldname = BOLPARM_JG
OFFSET16=5448
TUNIT16=' '
COMMENT  Load resistance, in ohms
TFORM17='1E'
TTYPE17='BOLPARM10' / entire fieldname = BOLPARM_RL
OFFSET17=5452
TUNIT17='ohm'
COMMENT 
COMMENT  Mission Average Bolometer State
COMMENT 
COMMENT  Commanded bolometer bias, in V
TFORM18='1E'
TTYPE18='BOLOM_BI' / entire fieldname = BOLOM_BIAS
OFFSET18=5456
TUNIT18='V'
COMMENT  Bolometer readout voltage, in V
TFORM19='1E'
TTYPE19='BOLOM_VO' / entire fieldname = BOLOM_VOLTAGE
OFFSET19=5460
TUNIT19='V'
COMMENT  Bolometer operating temperature, in K
TFORM20='1E'
TTYPE20='BOLOM_TE' / entire fieldname = BOLOM_TEMPERATURE
OFFSET20=5464
TUNIT20='K'
COMMENT  Bolometer bath temperature, in K
TFORM21='1E'
TTYPE21='BOLOM_B2' / entire fieldname = BOLOM_BATHTEMP
OFFSET21=5468
TUNIT21='K'
COMMENT 
COMMENT  Optical Model
COMMENT 
COMMENT  Real part of internal calibrator emissivity (dimensionless)
TFORM22='210E'
TDIM22='(210)'
TTYPE22='RICAL' / entire fieldname = RICAL
OFFSET22=5472
TUNIT22=' '
COMMENT  Imaginary part of internal calibrator emissivity (dimensionless)
TFORM23='210E'
TDIM23='(210)'
TTYPE23='IICAL' / entire fieldname = IICAL
OFFSET23=6312
TUNIT23=' '
COMMENT  Real part of sky horn emissivity (dimensionless)
TFORM24='210E'
TDIM24='(210)'
TTYPE24='RSKYHORN' / entire fieldname = RSKYHORN
OFFSET24=7152
TUNIT24=' '
COMMENT  Imaginary part of sky horn emissivity (dimensionless)
TFORM25='210E'
TDIM25='(210)'
TTYPE25='ISKYHORN' / entire fieldname = ISKYHORN
OFFSET25=7992
TUNIT25=' '
COMMENT  Real part of reference horn emissivity (dimensionless)
TFORM26='210E'
TDIM26='(210)'
TTYPE26='RREFHORN' / entire fieldname = RREFHORN
OFFSET26=8832
TUNIT26=' '
COMMENT  Imaginary part of reference horn emissivity (dimensionless)
TFORM27='210E'
TDIM27='(210)'
TTYPE27='IREFHORN' / entire fieldname = IREFHORN
OFFSET27=9672
TUNIT27=' '
COMMENT  Real part of dihedral emissivity (dimensionless)
TFORM28='210E'
TDIM28='(210)'
TTYPE28='RDIHEDRA' / entire fieldname = RDIHEDRAL
OFFSET28=10512
TUNIT28=' '
COMMENT  Imaginary part of dihedral emissivity (dimensionless)
TFORM29='210E'
TDIM29='(210)'
TTYPE29='IDIHEDRA' / entire fieldname = IDIHEDRAL
OFFSET29=11352
TUNIT29=' '
COMMENT  Real part of structure emissivity (dimensionless)
TFORM30='210E'
TDIM30='(210)'
TTYPE30='RSTRUCTU' / entire fieldname = RSTRUCTURE
OFFSET30=12192
TUNIT30=' '
COMMENT  Imaginary part of structure emissivity (dimensionless)
TFORM31='210E'
TDIM31='(210)'
TTYPE31='ISTRUCTU' / entire fieldname = ISTRUCTURE
OFFSET31=13032
TUNIT31=' '
COMMENT  Real part of bolometer emissivity (dimensionless)
TFORM32='210E'
TDIM32='(210)'
TTYPE32='RBOLOMET' / entire fieldname = RBOLOMETER
OFFSET32=13872
TUNIT32=' '
COMMENT  Imaginary part of bolometer emissivity (dimensionless)
TFORM33='210E'
TDIM33='(210)'
TTYPE33='IBOLOMET' / entire fieldname = IBOLOMETER
OFFSET33=14712
TUNIT33=' '
COMMENT 
COMMENT  Optical Model Harmonic Correction Coefficients
COMMENT 
COMMENT  2nd harmonic correction coefficient (dimensionless)
TFORM34='1E'
TTYPE34='OPTPARM_' / entire fieldname = OPTPARM_2H
OFFSET34=15552
TUNIT34=' '
COMMENT  3rd harmonic correction coefficient (dimensionless)
TFORM35='1E'
TTYPE35='OPTPARM2' / entire fieldname = OPTPARM_3H
OFFSET35=15556
TUNIT35=' '
COMMENT 
COMMENT  Optical Model Vibration Correction Coefficients
COMMENT     (primary vibration correction is a
COMMENT      quartic polynomial in time)
COMMENT 
COMMENT  Primary vibration correction offset (dimensionless)
TFORM36='1E'
TTYPE36='OPTPARM3' / entire fieldname = OPTPARM_VP0
OFFSET36=15560
TUNIT36=' '
COMMENT  Primary vibration correction linear coefficient, in yr^(-1)
TFORM37='1E'
TTYPE37='OPTPARM4' / entire fieldname = OPTPARM_VP1
OFFSET37=15564
TUNIT37='yr^(-1)'
COMMENT  Primary vibration correction quadratic coefficient, in yr^(-2)
TFORM38='1E'
TTYPE38='OPTPARM5' / entire fieldname = OPTPARM_VP2
OFFSET38=15568
TUNIT38='yr^(-2)'
COMMENT  Primary vibration correction cubic coefficient, in yr^(-3)
TFORM39='1E'
TTYPE39='OPTPARM6' / entire fieldname = OPTPARM_VP3
OFFSET39=15572
TUNIT39='yr^(-3)'
COMMENT  Primary vibration correction quartic coefficient, in yr^(-4)
TFORM40='1E'
TTYPE40='OPTPARM7' / entire fieldname = OPTPARM_VP4
OFFSET40=15576
TUNIT40='yr^(-4)'
COMMENT  Secondary vibration correction coefficient (dimensionless)
TFORM41='1E'
TTYPE41='OPTPARM8' / entire fieldname = OPTPARM_VS
OFFSET41=15580
TUNIT41=' '
COMMENT 
COMMENT  Internal Calibrator Temperature Correction Parameters
COMMENT     (temperature drift is exponential in time
COMMENT      since COBE aperture cover ejection:
COMMENT      11:18:00 UTC, 21 November 1989)
COMMENT 
COMMENT  Ical drift amplitude, in K
TFORM42='1E'
TTYPE42='DRIFT_AM' / entire fieldname = DRIFT_AMP
OFFSET42=15584
TUNIT42='K'
COMMENT  Ical drift time constant, in yr
TFORM43='1E'
TTYPE43='DRIFT_TC' / entire fieldname = DRIFT_TC
OFFSET43=15588
TUNIT43='yr'
COMMENT  Ical drift offset, in K
TFORM44='1E'
TTYPE44='DRIFT_OF' / entire fieldname = DRIFT_OFFSET
OFFSET44=15592
TUNIT44='K'
COMMENT 
COMMENT  External Calibrator Temperature Correction
COMMENT 
COMMENT  Xcal temperature correction, in K
TFORM45='1E'
TTYPE45='XCAL_COR' / entire fieldname = XCAL_CORRECTION
OFFSET45=15596
TUNIT45='K'
COMMENT 
END

--------------------------------------------------------------------------------

	Calibration Errors

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'CAL-ERR'            / Calibration errors
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT
COMMENT   FIRAS specific keywords
CHANSCAN= 'LLSS'               / Channel and mirror transport mechanism scan
COMMENT                        / mode identifier.  The first two characters
COMMENT                        / indicate the channel, the first being the
COMMENT                        / instrument side: right (R) or left (L); and
COMMENT                        / the second being the frequency: high (H) or
COMMENT                        / low (L).  The third and fourth characters
COMMENT                        / indicate the scan mode, the third being the
COMMENT                        / scan length: short (S) or long (L); and the
COMMENT                        / fourth being the scan speed: slow (S) or 
COMMENT                        / fast (F).  In addition, the scan mode may
COMMENT                        / take the following values for low frequency
COMMENT                        / data only (channel = RL or LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
COMMENT                        / The scan mode value FA indicates: for high
COMMENT                        / frequency data (channel = RH or LH), a
COMMENT                        / combination of SF and LF data; and for low
COMMENT                        / frequency data (channel = RL or LL), a
COMMENT                        / combination of FS and FL data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points 
COMMENT                        / in GHz
NUM_FREQ=                   43 / Number of frequency points with good data
END
COMMENT 
COMMENT 
COMMENT  FIRAS Calibration Errors
COMMENT  Project Dataset Record Structure
COMMENT 
COMMENT 
COMMENT  Error Terms
COMMENT 
COMMENT  Emissivity gain error (dimensionless)
TFORM1='210E'
TDIM1='(210)'
TTYPE1='PEP_GAIN' / entire fieldname = PEP_GAIN
OFFSET1=0
TUNIT1=' '
COMMENT  Emissivity offset error, in MJy/sr
TFORM2='210E'
TDIM2='(210)'
TTYPE2='PEP_OFFS' / entire fieldname = PEP_OFFSET
OFFSET2=840
TUNIT2='MJy/sr'
COMMENT  Bolometer parameter gain error (dimensionless)
TFORM3='2730E'
TDIM3='(13,210)'
TTYPE3='JCJ_GAIN' / entire fieldname = JCJ_GAIN
OFFSET3=1680
TUNIT3=' '
COMMENT  Bolometer parameter offset error, in MJy/sr
TFORM4='2730E'
TDIM4='(13,210)'
TTYPE4='JCJ_OFFS' / entire fieldname = JCJ_OFFSET
OFFSET4=12600
TUNIT4='MJy/sr'
COMMENT  Ical temperature error, in K
TFORM5='1E'
TTYPE5='PUP_TEMP' / entire fieldname = PUP_TEMP
OFFSET5=23520
TUNIT5='K'
COMMENT  Ical temperature error spectrum, in MJy/sr
TFORM6='210E'
TDIM6='(210)'
TTYPE6='PUP_SPEC' / entire fieldname = PUP_SPEC
OFFSET6=23524
TUNIT6='MJy/sr'
COMMENT  Absolute temperature error, in K
TFORM7='1E'
TTYPE7='PTP_TEMP' / entire fieldname = PTP_TEMP
OFFSET7=24364
TUNIT7='K'
COMMENT  Absolute temperature error spectrum, in MJy/sr
TFORM8='210E'
TDIM8='(210)'
TTYPE8='PTP_SPEC' / entire fieldname = PTP_SPEC
OFFSET8=24368
TUNIT8='MJy/sr'
COMMENT 
END

--------------------------------------------------------------------------------

	Combined Calibration Errors

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'CCAL-ERR'           / Combined calibration errors
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT
COMMENT   FIRAS specific keywords
CHANSCAN= 'LOWF'               / Field indicating combination of data from
COMMENT                        / various channels and mirror transport 
COMMENT                        / mechanism scan modes.  LOWF is a combination
COMMENT                        / of the low frequency RLSS, RLFS, RLFL, LLSS, 
COMMENT                        / LLFS, and LLFL data.  HIGH is a combination of
COMMENT                        / the high frequency RHSS, RHSF, RHLF, LHSS, 
COMMENT                        / LHSF, and LHLF data.  HIF2, HIF3, and HIF4 
COMMENT                        / divide the HIGH data into three frequency 
COMMENT                        / bands, as indicated by the NU_ZERO and 
COMMENT                        / NUM_FREQ fields.  HRES is a combination of the
COMMENT                        / high resolution RLLF and LLLF data.  For the 
COMMENT                        / uncombined channel/scan mode labels, the first
COMMENT                        / two characters of the label indicate the 
COMMENT                        / channel, the first being the instrument side: 
COMMENT                        / right (R) or left (L); and the second being 
COMMENT                        / the frequency:  high (H) or low (L).  The 
COMMENT                        / third and fourth characters indicate the scan 
COMMENT                        / mode, the third being the scan length:  short 
COMMENT                        / (S) or long (L); and the fourth being the scan
COMMENT                        / speed:  slow (S) or fast (F).  In addition, 
COMMENT                        / the scan mode may take the following values 
COMMENT                        / for low frequency data only (channel = RL or 
COMMENT                        / LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points
COMMENT                        / in GHz
NUM_FREQ=                   43 / Number of frequency points with good data
END
COMMENT 
COMMENT 
COMMENT  FIRAS Combined Calibration Errors
COMMENT  Project Dataset Record Structure
COMMENT 
COMMENT 
COMMENT  Error Terms
COMMENT 
COMMENT  Emissivity gain error (dimensionless)
TFORM1='182E'
TDIM1='(182)'
TTYPE1='PEP_GAIN' / entire fieldname = PEP_GAIN
OFFSET1=0
TUNIT1=' '
COMMENT  Bolometer parameter gain error (dimensionless)
TFORM2='182E'
TDIM2='(182)'
TTYPE2='JCJ_GAIN' / entire fieldname = JCJ_GAIN
OFFSET2=728
TUNIT2=' '
COMMENT  Ical temperature error, in K
TFORM3='1E'
TTYPE3='PUP_TEMP' / entire fieldname = PUP_TEMP
OFFSET3=1456
TUNIT3='K'
COMMENT  Ical temperature error spectrum, in MJy/sr
TFORM4='182E'
TDIM4='(182)'
TTYPE4='PUP_SPEC' / entire fieldname = PUP_SPEC
OFFSET4=1460
TUNIT4='MJy/sr'
COMMENT  Absolute temperature error, in K
TFORM5='1E'
TTYPE5='PTP_TEMP' / entire fieldname = PTP_TEMP
OFFSET5=2188
TUNIT5='K'
COMMENT  Absolute temperature error spectrum, in MJy/sr
TFORM6='182E'
TDIM6='(182)'
TTYPE6='PTP_SPEC' / entire fieldname = PTP_SPEC
OFFSET6=2192
TUNIT6='MJy/sr'
COMMENT 
END

--------------------------------------------------------------------------------

	Model Selection Errors

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'MOD-ERRS'           / Model selection errors
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT
COMMENT   FIRAS specific keywords
CHANSCAN= 'LOWF'               / Field indicating combination of data from
COMMENT                        / various channels and mirror transport 
COMMENT                        / mechanism scan modes.  LOWF is a combination
COMMENT                        / of the low frequency RLSS, RLFS, RLFL, LLSS, 
COMMENT                        / LLFS, and LLFL data.  HIGH is a combination of
COMMENT                        / the high frequency RHSS, RHSF, RHLF, LHSS, 
COMMENT                        / LHSF, and LHLF data.  HIF2, HIF3, and HIF4 
COMMENT                        / divide the HIGH data into three frequency 
COMMENT                        / bands, as indicated by the NU_ZERO and 
COMMENT                        / NUM_FREQ fields.  HRES is a combination of the
COMMENT                        / high resolution RLLF and LLLF data.  For the 
COMMENT                        / uncombined channel/scan mode labels, the first
COMMENT                        / two characters of the label indicate the 
COMMENT                        / channel, the first being the instrument side: 
COMMENT                        / right (R) or left (L); and the second being 
COMMENT                        / the frequency:  high (H) or low (L).  The 
COMMENT                        / third and fourth characters indicate the scan 
COMMENT                        / mode, the third being the scan length:  short 
COMMENT                        / (S) or long (L); and the fourth being the scan
COMMENT                        / speed:  slow (S) or fast (F).  In addition, 
COMMENT                        / the scan mode may take the following values 
COMMENT                        / for low frequency data only (channel = RL or 
COMMENT                        / LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points
COMMENT                        / in GHz
NUM_FREQ=                   43 / Number of frequency points with good data
END
COMMENT 
COMMENT 
COMMENT  FIRAS Comparison Spectrum
COMMENT  Project Dataset Record Structure
COMMENT 
COMMENT 
COMMENT  Destriper model description
TFORM1='80A'
TTYPE1='DESCRIP1' / entire fieldname = DESCRIP1
OFFSET1=0
TUNIT1=' '
COMMENT  Comparison destriper model description
TFORM2='80A'
TTYPE2='DESCRIP2' / entire fieldname = DESCRIP2
OFFSET2=80
TUNIT2=' '
COMMENT  Channel/scan mode
TFORM3='4A'
TTYPE3='CHANSCAN' / entire fieldname = CHANSCAN1
OFFSET3=160
TUNIT3=' '
COMMENT  Comparison channel/scan mode
TFORM4='4A'
TTYPE4='CHANSCA2' / entire fieldname = CHANSCAN2
OFFSET4=164
TUNIT4=' '
COMMENT  Difference spectrum, in MJy/sr
TFORM5='60E'
TDIM5='(60)'
TTYPE5='DIFF_SPE' / entire fieldname = DIFF_SPEC
OFFSET5=168
TUNIT5='MJy/sr'
COMMENT  Difference spectrum sigma, in MJy/sr
TFORM6='60E'
TDIM6='(60)'
TTYPE6='DIFF_SP2' / entire fieldname = DIFF_SPEC_SIG
OFFSET6=408
TUNIT6='MJy/sr'
COMMENT 
END

--------------------------------------------------------------------------------

	Low Frequency Line Profiles

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'LLINE-PR'           / Low frequency line profiles
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT
COMMENT   FIRAS specific keywords
CHANSCAN= 'LLSS'               / Channel and mirror transport mechanism scan
COMMENT                        / mode identifier.  The first two characters
COMMENT                        / indicate the channel, the first being the
COMMENT                        / instrument side: right (R) or left (L); and
COMMENT                        / the second being the frequency: high (H) or
COMMENT                        / low (L).  The third and fourth characters
COMMENT                        / indicate the scan mode, the third being the
COMMENT                        / scan length: short (S) or long (L); and the
COMMENT                        / fourth being the scan speed: slow (S) or 
COMMENT                        / fast (F).  In addition, the scan mode may
COMMENT                        / take the following values for low frequency
COMMENT                        / data only (channel = RL or LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
COMMENT                        / The scan mode value FA indicates: for high
COMMENT                        / frequency data (channel = RH or LH), a
COMMENT                        / combination of SF and LF data; and for low
COMMENT                        / frequency data (channel = RL or LL), a
COMMENT                        / combination of FS and FL data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points 
COMMENT                        / in GHz
NUM_FREQ=                   43 / Number of frequency points with good data
END
COMMENT
COMMENT 
COMMENT  FIRAS Low Frequency Line Profiles
COMMENT  Project Dataset Record Structure 
COMMENT 
COMMENT 
COMMENT  115.27 GHz CO (J=1-0) line profile, in cm*MJy/(nanowatts/m^2)
TFORM1='210E'
TDIM1='(210)'
TTYPE1='CO_115' / entire fieldname = CO_115
OFFSET1=0
TUNIT1='cm*MJy/(nanowatts/m^2)'
COMMENT  230.54 GHz CO (J=2-1) line profile, in cm*MJy/(nanowatts/m^2)
TFORM2='210E'
TDIM2='(210)'
TTYPE2='CO_230' / entire fieldname = CO_230
OFFSET2=840
TUNIT2='cm*MJy/(nanowatts/m^2)'
COMMENT  345.80 GHz CO (J=3-2) line profile, in cm*MJy/(nanowatts/m^2)
TFORM3='210E'
TDIM3='(210)'
TTYPE3='CO_345' / entire fieldname = CO_345
OFFSET3=1680
TUNIT3='cm*MJy/(nanowatts/m^2)'
COMMENT  424.75 GHz O2 line profile, in cm*MJy/(nanowatts/m^2)
TFORM4='210E'
TDIM4='(210)'
TTYPE4='O2_424' / entire fieldname = O2_424
OFFSET4=2520
TUNIT4='cm*MJy/(nanowatts/m^2)'
COMMENT  461.04 GHz CO (J=4-3) line profile, in cm*MJy/(nanowatts/m^2)
TFORM5='210E'
TDIM5='(210)'
TTYPE5='CO_461' / entire fieldname = CO_461
OFFSET5=3360
TUNIT5='cm*MJy/(nanowatts/m^2)'
COMMENT  492.23 GHz [C I] line profile, in cm*MJy/(nanowatts/m^2)
TFORM6='210E'
TDIM6='(210)'
TTYPE6='C_I_492' / entire fieldname = C_I_492
OFFSET6=4200
TUNIT6='cm*MJy/(nanowatts/m^2)'
COMMENT  556.89 GHz H2O line profile, in cm*MJy/(nanowatts/m^2)
TFORM7='210E'
TDIM7='(210)'
TTYPE7='H2O_556' / entire fieldname = H2O_556
OFFSET7=5040
TUNIT7='cm*MJy/(nanowatts/m^2)'
COMMENT  576.27 GHz CO (J=5-4) line profile, in cm*MJy/(nanowatts/m^2)
TFORM8='210E'
TDIM8='(210)'
TTYPE8='CO_576' / entire fieldname = CO_576
OFFSET8=5880
TUNIT8='cm*MJy/(nanowatts/m^2)'
COMMENT 
END

--------------------------------------------------------------------------------

	High Frequency Line Profiles

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'HLINE-PR'           / High frequency line profiles
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT
COMMENT   FIRAS specific keywords
CHANSCAN= 'LHSS'               / Channel and mirror transport mechanism scan
COMMENT                        / mode identifier.  The first two characters
COMMENT                        / indicate the channel, the first being the
COMMENT                        / instrument side: right (R) or left (L); and
COMMENT                        / the second being the frequency: high (H) or
COMMENT                        / low (L).  The third and fourth characters
COMMENT                        / indicate the scan mode, the third being the
COMMENT                        / scan length: short (S) or long (L); and the
COMMENT                        / fourth being the scan speed: slow (S) or 
COMMENT                        / fast (F).  In addition, the scan mode may
COMMENT                        / take the following values for low frequency
COMMENT                        / data only (channel = RL or LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
COMMENT                        / The scan mode value FA indicates: for high
COMMENT                        / frequency data (channel = RH or LH), a
COMMENT                        / combination of SF and LF data; and for low
COMMENT                        / frequency data (channel = RL or LL), a
COMMENT                        / combination of FS and FL data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points 
COMMENT                        / in GHz
NUM_FREQ=                  210 / Number of frequency points with good data
END
COMMENT
COMMENT 
COMMENT  FIRAS High Frequency Line Profiles
COMMENT  Project Dataset Record Structure 
COMMENT 
COMMENT 
COMMENT  115.27 GHz CO (J=1-0) line profile, in cm*MJy/(nanowatts/m^2)
TFORM1='210E'
TDIM1='(210)'
TTYPE1='CO_115' / entire fieldname = CO_115
OFFSET1=0
TUNIT1='cm*MJy/(nanowatts/m^2)'
COMMENT  230.54 GHz CO (J=2-1) line profile, in cm*MJy/(nanowatts/m^2)
TFORM2='210E'
TDIM2='(210)'
TTYPE2='CO_230' / entire fieldname = CO_230
OFFSET2=840
TUNIT2='cm*MJy/(nanowatts/m^2)'
COMMENT  345.80 GHz CO (J=3-2) line profile, in cm*MJy/(nanowatts/m^2)
TFORM3='210E'
TDIM3='(210)'
TTYPE3='CO_345' / entire fieldname = CO_345
OFFSET3=1680
TUNIT3='cm*MJy/(nanowatts/m^2)'
COMMENT  424.75 GHz O2 line profile, in cm*MJy/(nanowatts/m^2)
TFORM4='210E'
TDIM4='(210)'
TTYPE4='O2_424' / entire fieldname = O2_424
OFFSET4=2520
TUNIT4='cm*MJy/(nanowatts/m^2)'
COMMENT  461.04 GHz CO (J=4-3) line profile, in cm*MJy/(nanowatts/m^2)
TFORM5='210E'
TDIM5='(210)'
TTYPE5='CO_461' / entire fieldname = CO_461
OFFSET5=3360
TUNIT5='cm*MJy/(nanowatts/m^2)'
COMMENT  492.23 GHz [C I] line profile, in cm*MJy/(nanowatts/m^2)
TFORM6='210E'
TDIM6='(210)'
TTYPE6='C_I_492' / entire fieldname = C_I_492
OFFSET6=4200
TUNIT6='cm*MJy/(nanowatts/m^2)'
COMMENT  556.89 GHz H2O line profile, in cm*MJy/(nanowatts/m^2)
TFORM7='210E'
TDIM7='(210)'
TTYPE7='H2O_556' / entire fieldname = H2O_556
OFFSET7=5040
TUNIT7='cm*MJy/(nanowatts/m^2)'
COMMENT  576.27 GHz CO (J=5-4) line profile, in cm*MJy/(nanowatts/m^2)
TFORM8='210E'
TDIM8='(210)'
TTYPE8='CO_576' / entire fieldname = CO_576
OFFSET8=5880
TUNIT8='cm*MJy/(nanowatts/m^2)'
COMMENT  691.47 GHz CO (J=6-5) line profile, in cm*MJy/(nanowatts/m^2)
TFORM9='210E'
TDIM9='(210)'
TTYPE9='CO_691' / entire fieldname = CO_691
OFFSET9=6720
TUNIT9='cm*MJy/(nanowatts/m^2)'
COMMENT  809.44 GHz [C I] line profile, in cm*MJy/(nanowatts/m^2)
TFORM10='210E'
TDIM10='(210)'
TTYPE10='C_I_809' / entire fieldname = C_I_809
OFFSET10=7560
TUNIT10='cm*MJy/(nanowatts/m^2)'
COMMENT  1113.3 GHz H2O line profile, in cm*MJy/(nanowatts/m^2)
TFORM11='210E'
TDIM11='(210)'
TTYPE11='H2O_1113' / entire fieldname = H2O_1113
OFFSET11=8400
TUNIT11='cm*MJy/(nanowatts/m^2)'
COMMENT  1461.1 GHz [N II] line profile, in cm*MJy/(nanowatts/m^2)
TFORM12='210E'
TDIM12='(210)'
TTYPE12='N_II_146' / entire fieldname = N_II_1461
OFFSET12=9240
TUNIT12='cm*MJy/(nanowatts/m^2)'
COMMENT  1716.6 GHz H2O (J=2-1) line profile, in cm*MJy/(nanowatts/m^2)
TFORM13='210E'
TDIM13='(210)'
TTYPE13='H2O_1716' / entire fieldname = H2O_1716
OFFSET13=10080
TUNIT13='cm*MJy/(nanowatts/m^2)'
COMMENT  1900.5 GHz [C II] line profile, in cm*MJy/(nanowatts/m^2)
TFORM14='210E'
TDIM14='(210)'
TTYPE14='C_II_190' / entire fieldname = C_II_1900
OFFSET14=10920
TUNIT14='cm*MJy/(nanowatts/m^2)'
COMMENT  2060.1 GHz [O I] line profile, in cm*MJy/(nanowatts/m^2)
TFORM15='210E'
TDIM15='(210)'
TTYPE15='O_I_2060' / entire fieldname = O_I_2060
OFFSET15=11760
TUNIT15='cm*MJy/(nanowatts/m^2)'
COMMENT  2311.7 GHz [Si I] line profile, in cm*MJy/(nanowatts/m^2)
TFORM16='210E'
TDIM16='(210)'
TTYPE16='SI_I_231' / entire fieldname = SI_I_2311
OFFSET16=12600
TUNIT16='cm*MJy/(nanowatts/m^2)'
COMMENT  2459.4 GHz [N II] line profile, in cm*MJy/(nanowatts/m^2)
TFORM17='210E'
TDIM17='(210)'
TTYPE17='N_II_245' / entire fieldname = N_II_2459
OFFSET17=13440
TUNIT17='cm*MJy/(nanowatts/m^2)'
COMMENT  2589.6 GHz CH (J=2-1) line profile, in cm*MJy/(nanowatts/m^2)
TFORM18='210E'
TDIM18='(210)'
TTYPE18='CH_2589' / entire fieldname = CH_2589
OFFSET18=14280
TUNIT18='cm*MJy/(nanowatts/m^2)'
COMMENT 
END

--------------------------------------------------------------------------------

	Low Frequency Line Map

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'LLIN-MAP'           / Low frequency line map
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LOWF'               / Field indicating combination of data from
COMMENT                        / various channels and mirror transport 
COMMENT                        / mechanism scan modes.  LOWF is a combination
COMMENT                        / of the low frequency RLSS, RLFS, RLFL, LLSS, 
COMMENT                        / LLFS, and LLFL data.  HIGH is a combination of
COMMENT                        / the high frequency RHSS, RHSF, RHLF, LHSS, 
COMMENT                        / LHSF, and LHLF data.  HRES is a combination of
COMMENT                        / the high resolution RLLF and LLLF data.  For 
COMMENT                        / the uncombined channel/scan mode labels, the 
COMMENT                        / first two characters of the label indicate the 
COMMENT                        / channel, the first being the instrument side: 
COMMENT                        / right (R) or left (L); and the second being 
COMMENT                        / the frequency:  high (H) or low (L).  The 
COMMENT                        / third and fourth characters indicate the scan 
COMMENT                        / mode, the third being the scan length:  short 
COMMENT                        / (S) or long (L); and the fourth being the scan
COMMENT                        / speed:  slow (S) or fast (F).  In addition, 
COMMENT                        / the scan mode may take the following values 
COMMENT                        / for low frequency data only (channel = RL or 
COMMENT                        / LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
COMMENT
COMMENT                        / Eight line frequencies represented in this map
LINFRQ1 =              115.27  / CO (J=1-0) line frequency, in GHz  
LINFRQ2 =              230.54  / CO (J=2-1) line frequency, in GHz  
LINFRQ3 =              345.80  / CO (J=3-2) line frequency, in GHz  
LINFRQ4 =              424.75  / O2 line frequency, in GHz  
LINFRQ5 =              461.04  / CO (J=4-3) line frequency, in GHz  
LINFRQ6 =              492.23  / [C I] line frequency, in GHz
LINFRQ7 =              556.89  / H2O line frequency, in GHz
LINFRQ8 =              576.27  / CO (J=5-4) line frequency, in GHz
END
COMMENT
COMMENT 
COMMENT  FIRAS Low Frequency Line Emission Map
COMMENT  Project Dataset Record Structure 
COMMENT 
COMMENT 
COMMENT  FIRAS pixel number (resolution 6)
TFORM1='1J'
TTYPE1='PIXEL' / entire fieldname = PIXEL
OFFSET1=0
TUNIT1=' '
COMMENT  Galactic longitude, in deg (0 -> 360)
TFORM2='1E'
TTYPE2='GAL_LON' / entire fieldname = GAL_LON
OFFSET2=4
TUNIT2='deg'
COMMENT  Galactic latitude, in deg (-90 -> +90)
TFORM3='1E'
TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT
OFFSET3=8
TUNIT3='deg'
COMMENT  Pixel weight
TFORM4='1E'
TTYPE4='WEIGHT' / entire fieldname = WEIGHT
OFFSET4=12
TUNIT4=' '
COMMENT 
COMMENT  Line Flux Parameters and Uncertainties
COMMENT 
COMMENT  Line flux, in nano-Watts/(m^2*sr)
TFORM5='8E'
TDIM5='(8)'
TTYPE5='LINE_FLU' / entire fieldname = LINE_FLUX
OFFSET5=16
TUNIT5='nano-Watts/(m^2*sr)'
COMMENT  Sigmas of line flux, in nano-Watts/(m^2*sr)
TFORM6='8E'
TDIM6='(8)'
TTYPE6='LINE_FL2' / entire fieldname = LINE_FLUX_SIGMA
OFFSET6=48
TUNIT6='nano-Watts/(m^2*sr)'
COMMENT  PEP gain sigmas of line flux, in nano-Watts/(m^2*sr)
TFORM7='8E'
TDIM7='(8)'
TTYPE7='LINE_FL3' / entire fieldname = LINE_FLUX_PSIG
OFFSET7=80
TUNIT7='nano-Watts/(m^2*sr)'
COMMENT 
END

--------------------------------------------------------------------------------

	High Frequency Line Map

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'HLIN-MAP'           / High frequency line map
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'HIGH'               / Field indicating combination of data from
COMMENT                        / various channels and mirror transport 
COMMENT                        / mechanism scan modes.  LOWF is a combination
COMMENT                        / of the low frequency RLSS, RLFS, RLFL, LLSS, 
COMMENT                        / LLFS, and LLFL data.  HIGH is a combination of
COMMENT                        / the high frequency RHSS, RHSF, RHLF, LHSS, 
COMMENT                        / LHSF, and LHLF data.  HRES is a combination of
COMMENT                        / the high resolution RLLF and LLLF data.  For 
COMMENT                        / the uncombined channel/scan mode labels, the 
COMMENT                        / first two characters of the label indicate the 
COMMENT                        / channel, the first being the instrument side: 
COMMENT                        / right (R) or left (L); and the second being 
COMMENT                        / the frequency:  high (H) or low (L).  The 
COMMENT                        / third and fourth characters indicate the scan 
COMMENT                        / mode, the third being the scan length:  short 
COMMENT                        / (S) or long (L); and the fourth being the scan
COMMENT                        / speed:  slow (S) or fast (F).  In addition, 
COMMENT                        / the scan mode may take the following values 
COMMENT                        / for low frequency data only (channel = RL or 
COMMENT                        / LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
COMMENT
NU_ZERO =              1800.0  / Characteristic freq of optical depth in GHz
DUST_IND=                 2.0  / Dust spectral index
COMMENT                        / Ten line frequencies represented in this map
LINFRQ1 =              691.47  / CO (J=6-5) line frequency, in GHz  
LINFRQ2 =              809.44  / [C I] line frequency, in GHz  
LINFRQ3 =              1113.3  / H2O line frequency, in GHz 
LINFRQ4 =              1461.1  / [N II] line frequency, in GHz  
LINFRQ5 =              1716.6  / H2O (J=2-1) line frequency, in GHz 
LINFRQ6 =              1900.5  / [C II] line frequency, in GHz  
LINFRQ7 =              2060.1  / [O I] line frequency, in GHz
LINFRQ8 =              2311.7  / [Si I] line frequency, in GHz
LINFRQ9 =              2459.4  / [N II] line frequency, in GHz
LINFRQ10=              2589.6  / CH (J=2-1) line frequency, in GHz
END
COMMENT
COMMENT 
COMMENT  FIRAS High Frequency Line Emission Map
COMMENT  Project Dataset Record Structure 
COMMENT 
COMMENT 
COMMENT  FIRAS pixel number (resolution 6)
TFORM1='1J'
TTYPE1='PIXEL' / entire fieldname = PIXEL
OFFSET1=0
TUNIT1=' '
COMMENT  Galactic longitude, in deg (0 -> 360)
TFORM2='1E'
TTYPE2='GAL_LON' / entire fieldname = GAL_LON
OFFSET2=4
TUNIT2='deg'
COMMENT  Galactic latitude, in deg (-90 -> +90)
TFORM3='1E'
TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT
OFFSET3=8
TUNIT3='deg'
COMMENT  Pixel weight
TFORM4='1E'
TTYPE4='WEIGHT' / entire fieldname = WEIGHT
OFFSET4=12
TUNIT4=' '
COMMENT 
COMMENT  Line Flux Parameters and Uncertainties
COMMENT 
COMMENT  Line flux, in nano-Watts/(m^2*sr)
TFORM5='10E'
TDIM5='(10)'
TTYPE5='LINE_FLU' / entire fieldname = LINE_FLUX
OFFSET5=16
TUNIT5='nano-Watts/(m^2*sr)'
COMMENT  Sigmas of line flux, in nano-Watts/(m^2*sr)
TFORM6='10E'
TDIM6='(10)'
TTYPE6='LINE_FL2' / entire fieldname = LINE_FLUX_SIGMA
OFFSET6=56
TUNIT6='nano-Watts/(m^2*sr)'
COMMENT  PEP gain sigmas of line flux, in nano-Watts/(m^2*sr)
TFORM7='10E'
TDIM7='(10)'
TTYPE7='LINE_FL3' / entire fieldname = LINE_FLUX_PSIG
OFFSET7=96
TUNIT7='nano-Watts/(m^2*sr)'
COMMENT 
COMMENT  Dust Model Parameters and Uncertainties
COMMENT 
COMMENT  Dust temperature, in K
TFORM8='1E'
TTYPE8='DUST_TEM' / entire fieldname = DUST_TEMP
OFFSET8=136
TUNIT8='K'
COMMENT  Sigma of dust temperature, in K
TFORM9='1E'
TTYPE9='DUST_TE2' / entire fieldname = DUST_TEMP_SIGMA
OFFSET9=140
TUNIT9='K'
COMMENT  Dust optical depth at 1800 GHz
TFORM10='1E'
TTYPE10='DUST_TAU' / entire fieldname = DUST_TAU
OFFSET10=144
TUNIT10=' '
COMMENT  Sigma of dust optical depth at 1800 GHz
TFORM11='1E'
TTYPE11='DUST_TA2' / entire fieldname = DUST_TAU_SIGMA
OFFSET11=148
TUNIT11=' '
COMMENT  Covariance of dust temperature and optical depth
TFORM12='1E'
TTYPE12='DUST_COV' / entire fieldname = DUST_COVAR
OFFSET12=152
TUNIT12=' '
COMMENT 
END

--------------------------------------------------------------------------------

	Dust Spectrum Map

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'DUST-MAP'           / Dust spectrum map
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LOWF'               / Field indicating combination of data from
COMMENT                        / various channels and mirror transport 
COMMENT                        / mechanism scan modes.  LOWF is a combination
COMMENT                        / of the low frequency RLSS, RLFS, RLFL, LLSS, 
COMMENT                        / LLFS, and LLFL data.  HIGH is a combination of
COMMENT                        / the high frequency RHSS, RHSF, RHLF, LHSS, 
COMMENT                        / LHSF, and LHLF data.  For the uncombined 
COMMENT                        / channel/scan mode labels, the first two 
COMMENT                        / characters of the label indicate the channel, 
COMMENT                        / the first being the instrument side: 
COMMENT                        / right (R) or left (L); and the second being 
COMMENT                        / the frequency:  high (H) or low (L).  The 
COMMENT                        / third and fourth characters indicate the scan 
COMMENT                        / mode, the third being the scan length:  short 
COMMENT                        / (S) or long (L); and the fourth being the scan
COMMENT                        / speed:  slow (S) or fast (F).  In addition, 
COMMENT                        / the scan mode may take the following values 
COMMENT                        / for low frequency data only (channel = RL or 
COMMENT                        / LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
NU_ZERO =            68.020812 / Optical frequency of initial data point in GHz
DELTA_NU=            13.604162 / Optical frequency interval between data points
COMMENT                        / in GHz
NUM_FREQ=                   43 / Number of frequency points with good data
END
COMMENT
COMMENT 
COMMENT  FIRAS Dust Spectrum
COMMENT  Project Dataset Record Structure 
COMMENT 
COMMENT 
COMMENT  FIRAS pixel number (resolution 6)
TFORM1='1J'
TTYPE1='PIXEL' / entire fieldname = PIXEL
OFFSET1=0
TUNIT1=' '
COMMENT  Galactic longitude, in deg (0 -> 360)
TFORM2='1E'
TTYPE2='GAL_LON' / entire fieldname = GAL_LON
OFFSET2=4
TUNIT2='deg'
COMMENT  Galactic latitude, in deg (-90 -> +90)
TFORM3='1E'
TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT
OFFSET3=8
TUNIT3='deg'
COMMENT  Pixel weight
TFORM4='1E'
TTYPE4='WEIGHT' / entire fieldname = WEIGHT
OFFSET4=12
TUNIT4=' '
COMMENT  Spectrum, in MJy/sr
TFORM5='182E'
TDIM5='(182)'
TTYPE5='SPECTRUM' / entire fieldname = SPECTRUM
OFFSET5=16
TUNIT5='MJy/sr'
COMMENT 
END

--------------------------------------------------------------------------------

	CMBR Temperature Map

SIMPLE  =                    T / specifies FITS standard file
BITPIX  =                   32 / if rasterized array follows, data 32-bit int
NAXIS   =                    0 / no rasterized arrays follow
EXTEND  =                    T / Table extensions may follow
ORIGIN  = 'CDAC'               / Cosmology Data Analysis Center
TELESCOP= 'COBE'               / COsmic Background Explorer satellite
INSTRUME= 'FIRAS'              / COBE instrument [DIRBE, DMR, FIRAS] 
OBJECT  = 'ALL-SKY'            / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'TEMP-MAP'           / CMBR temperature map
EQUINOX =               2000.0 / equinox of coords in following tables 
COMMENT
REFERENC= 'For additional information, please refer to the'
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)'
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,'
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),'
REFERENC= 'available in electronic form from the NSSDC.'
COMMENT
COMMENT   COBE specific keywords
DATE-BEG= '24/11/89           '/ date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90           '/ date of final data represented (dd/mm/yy)
PIXRESOL=                    6 / Quad tree pixel resolution [6, 9]
COMMENT 
COMMENT   FIRAS specific keywords
CHANSCAN= 'LOWF'               / Field indicating combination of data from
COMMENT                        / various channels and mirror transport 
COMMENT                        / mechanism scan modes.  LOWF is a combination
COMMENT                        / of the low frequency RLSS, RLFS, RLFL, LLSS, 
COMMENT                        / LLFS, and LLFL data.  For the uncombined 
COMMENT                        / channel/scan mode labels, the first two 
COMMENT                        / characters of the label indicate the channel, 
COMMENT                        / the first being the instrument side: 
COMMENT                        / right (R) or left (L); and the second being 
COMMENT                        / the frequency:  high (H) or low (L).  The 
COMMENT                        / third and fourth characters indicate the scan 
COMMENT                        / mode, the third being the scan length:  short 
COMMENT                        / (S) or long (L); and the fourth being the scan
COMMENT                        / speed:  slow (S) or fast (F).  In addition, 
COMMENT                        / the scan mode may take the following values 
COMMENT                        / for low frequency data only (channel = RL or 
COMMENT                        / LL):
COMMENT                        /      FS: decimated SF data;
COMMENT                        /      FL: truncated LF data.
MODLLABL= 'PASS4              '/ FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION     '/ FIRAS segment of mission represented
GALATEXC=                   15 / Absolute value of galactic latitude in degrees
COMMENT                        / below which input data was excluded in the
COMMENT                        / dipole fit
COMMENT
COMMENT   Results of CMBR temperature and dipole fit to temperature map:
COMMENT
CBR_TEMP=             2.727754 / CMBR temperature, in K
CBR_SIG=                 0.002 / CMBR temperature sigma, in mK
DIP_AMP=                3.3506 / Dipole amplitude, in mK
DIP_SIG=                 0.006 / Dipole amplitude sigma, in mK
DIP_LON=                264.98 / Dipole galactic longitude, in deg
DIP_LAT=                 47.92 / Dipole galactic latitude, in deg
DIR_SIG=                  0.09 / Dipole direction sigma, in deg
RMS_TEMP=                0.214 / RMS temperature residual, in mK
END
COMMENT
COMMENT 
COMMENT  FIRAS CMBR Temperature Map
COMMENT  Project Dataset Record Structure
COMMENT 
COMMENT 
COMMENT  FIRAS pixel number (resolution 6)
TFORM1='1J'
TTYPE1='PIXEL' / entire fieldname = PIXEL
OFFSET1=0
TUNIT1=' '
COMMENT  Galactic longitude, in deg (0 -> 360)
TFORM2='1E'
TTYPE2='GAL_LON' / entire fieldname = GAL_LON
OFFSET2=4
TUNIT2='deg'
COMMENT  Galactic latitude, in deg (-90 -> +90)
TFORM3='1E'
TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT
OFFSET3=8
TUNIT3='deg'
COMMENT  Pixel weight
TFORM4='1E'
TTYPE4='WEIGHT' / entire fieldname = WEIGHT
OFFSET4=12
TUNIT4=' '
COMMENT  CMBR temperature in pixel, in K
TFORM5='1E'
TTYPE5='TEMP' / entire fieldname = TEMP
OFFSET5=16
TUNIT5='K'
COMMENT  Sigma of CMBR temperature in pixel, in K
TFORM6='1E'
TTYPE6='TEMP_SIG' / entire fieldname = TEMP_SIGMA
OFFSET6=20
TUNIT6='K'
COMMENT  CMBR temperature residual in pixel, in K
TFORM7='1E'
TTYPE7='RESID_TE' / entire fieldname = RESID_TEMP
OFFSET7=24
TUNIT7='K'
COMMENT 
END