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FITS Headers

FIRAS_A_VECTOR_LOWF.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 = '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 o
COMMENT   f                                                                     
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 i
COMMENT   s                                                                     
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 fas
COMMENT   t                                                                     
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                                                                             

Extension Header 2

XTENSION= 'BINTABLE'           / Extension type is Binary Table                 
BITPIX  =                    8 / Binary data                                    
NAXIS   =                    2 / Data are in a table                            
NAXIS1  =                  128 / Number of 8 bit bytes in each row              
NAXIS2  =                    1 / Number of rows                                 
PCOUNT  =                    0 / Number of bytes of data following table        
GCOUNT  =                    1 / Group count (always 1 for bintable extensions) 
TFIELDS =                    1 / Number of fields (columns) in the table        
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                   
TUNIT1  = 'MJy/sr  '           /                                                
COMMENT                                                                         
END                                                                             

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