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
