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FITS Headers

FIRAS_DIRBE_GRADIENT_KERNEL_HRES.FITS

Primary Header

SIMPLE  =                    T / file does conform to FITS standard             
BITPIX  =                   32 / number of bits per data pixel                  
NAXIS   =                    0 / number of data axes                            
EXTEND  =                    T / FITS dataset may contain extensions            
COMMENT   FITS (Flexible Image Transport System) format defined in Astronomy and
COMMENT   Astrophysics Supplement Series v44/p363, v44/p371, v73/p359, v73/p365.
COMMENT   Contact the NASA Science Office of Standards and Technology for the   
COMMENT   FITS Definition document #100 and other FITS information.             
DATE    = '24/09/97'           / FITS file creation date (dd/mm/yy)             
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= 'HRES    '           /  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 o
COMMENT   f                                                                     
COMMENT                          / the high frequency RHSS, RHSF, RHLF, LHSS,   
COMMENT                          / LHSF, and LHLF data.  HRES is a combination o
COMMENT   f                                                                     
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 th
COMMENT   e                                                                     
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 sca
COMMENT   n                                                                     
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                                                                             

Extension Header 2

XTENSION= 'BINTABLE'           / Extension type is Binary Table                 
BITPIX  =                    8 / Binary data                                    
NAXIS   =                    2 / Data are in a table                            
NAXIS1  =                   28 / Number of 8 bit bytes in each row              
NAXIS2  =                55010 / Number of rows                                 
PCOUNT  =                    0 / Number of bytes of data following table        
GCOUNT  =                    1 / Group count (always 1 for bintable extensions) 
TFIELDS =                    7 / Number of fields (columns) in the table        
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                      
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                   
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                    
TUNIT3  = '        '           /                                                
COMMENT    Pixel weight                                                         
TFORM4  = '1E      '           /                                                
TTYPE4  = 'WEIGHT  '           /  entire fieldname = WEIGHT                     
TUNIT4  = '        '           /                                                
COMMENT    DIRBE band 8 gradient kernel                                         
TFORM5  = '1E      '           /                                                
TTYPE5  = 'BAND_8  '           /  entire fieldname = BAND_8                     
TUNIT5  = '        '           /                                                
COMMENT    DIRBE band 9 gradient kernel                                         
TFORM6  = '1E      '           /                                                
TTYPE6  = 'BAND_9  '           /  entire fieldname = BAND_9                     
TUNIT6  = '        '           /                                                
COMMENT    DIRBE band 10 gradient kernel                                        
TFORM7  = '1E      '           /                                                
TTYPE7  = 'BAND_10 '           /  entire fieldname = BAND_10                    
TUNIT7  = '        '           /                                                
COMMENT                                                                         
END                                                                             

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