FITS Headers
FIRAS_CALIBRATION_ERRORS_HIF4.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 = '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= 'HIF4 ' / 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, as indicated by the NU_ZERO and COMMENT / NUM_FREQ fields. HRES is a combination of th COMMENT e COMMENT / high resolution RLLF and LLLF data. For the COMMENT / uncombined channel/scan mode labels, the firs COMMENT t 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 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. MODLLABL= 'PASS4 ' / FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION' / FIRAS segment of mission represented NU_ZERO = 2108.6451 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 60 / Number of frequency points with good data END
Extension Header 2
XTENSION= 'BINTABLE' / Extension type is Binary Table BITPIX = 8 / Binary data NAXIS = 2 / Data are in a table NAXIS1 = 2920 / 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 = 6 / Number of fields (columns) in the table 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 TUNIT1 = ' ' / COMMENT Bolometer parameter gain error (dimensionless) TFORM2 = '182E ' / TDIM2 = '(182) ' / TTYPE2 = 'JCJ_GAIN' / entire fieldname = JCJ_GAIN TUNIT2 = ' ' / COMMENT Ical temperature error, in K TFORM3 = '1E ' / TTYPE3 = 'PUP_TEMP' / entire fieldname = PUP_TEMP TUNIT3 = 'K ' / COMMENT Ical temperature error spectrum, in MJy/sr TFORM4 = '182E ' / TDIM4 = '(182) ' / TTYPE4 = 'PUP_SPEC' / entire fieldname = PUP_SPEC TUNIT4 = 'MJy/sr ' / COMMENT Absolute temperature error, in K TFORM5 = '1E ' / TTYPE5 = 'PTP_TEMP' / entire fieldname = PTP_TEMP TUNIT5 = 'K ' / COMMENT Absolute temperature error spectrum, in MJy/sr TFORM6 = '182E ' / TDIM6 = '(182) ' / TTYPE6 = 'PTP_SPEC' / entire fieldname = PTP_SPEC TUNIT6 = 'MJy/sr ' / COMMENT END
