FITS Headers
DIRBE_DCAFINDEX_P3B_FACE0.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 = '09/04/97' / FITS file creation date (dd/mm/yy)
DATE-MAP= '04/04/96' / Date of original file creation (dd/mm/yy)
ORIGIN = 'CDAC ' / Cosmology Data Analysis Center
TELESCOP= 'COBE ' / Cosmic Background Explorer satellite
INSTRUME= 'DIRBE ' / COBE instrument [DIRBE, DMR, FIRAS]
OBJECT = 'FACE0 ' / part of sky given [e.g., ALL-SKY, WEEKLY-SKY,
COMMENT / DAILY-SKY, GAL-SLICE, FACE ...]
EQUINOX = 2000.0 / equinox of coords in following tables
REFERENC= 'COBE/DIRBE Explanatory Supplement,' /
REFERENC= 'ed. M.G. Hauser, T. Kelsall, D. Leisawitz, and J. Weiland,' /
REFERENC= 'COBE Ref. Pub. No. 97-A (Greenbelt,MD: NASA/GSFC),' /
REFERENC= 'available in electronic form from the NSSDC.' /
COMMENT
COMMENT COBE specific keywords
DATE-BEG= '11/12/89' / date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90' / date of final data represented (dd/mm/yy)
PIXRESOL= 9 / Quad tree pixel resolution [6, 9]
COMMENT
COMMENT DIRBE specific keywords
PRODUCT = 'DCAFINDEX_F0' / Pixel Index file for DCAF, Face 0
VERSION = 'Pass 3B ' / Version of Data Reduction Software
COMMENT
COMMENT
END
Extension Header 2
XTENSION= 'BINTABLE' / Extension type is Binary Table
BITPIX = 8 / Binary data
NAXIS = 2 / Data are in a table
NAXIS1 = 14 / Number of 8 bit bytes in each row
NAXIS2 = 65536 / Number of rows
PCOUNT = 0 / Number of bytes of data following table
GCOUNT = 1 / Group count (always 1 for bintable extensions)
TFIELDS = 3 / Number of fields (columns) in the table
COMMENT
COMMENT
COMMENT -------------------------------------------------------------------
COMMENT *******************************************************************
COMMENT DIRBE Calibrated Annual File, Face 0 : Pixel Index
COMMENT
COMMENT This is the companion pixel index to the DIRBE
COMMENT Calibrated Annual File (DCAF) for Face 0 of the COBE
COMMENT Quadrilateralized Spherical Cube: i.e., the index to DCAF
COMMENT data tabulated for DIRBE pixel numbers 0 - 65535.
COMMENT The pixel index is intended to simplify and expedite data
COMMENT retrieval for a user-selected subset of pixels in the
COMMENT DCAF. There is one row in the index table for each DIRBE
COMMENT pixel (resolution 9) on the cube face. Pixels are listed
COMMENT in ascending order. For each pixel, the pixel index
COMMENT table gives the number of the LAST row within the
COMMENT corresponding DCAF table which contains observations for
COMMENT that pixel, and specifies which mission weeks contain
COMMENT observations for that pixel.
COMMENT *******************************************************************
COMMENT -------------------------------------------------------------------
COMMENT ===================================================================
COMMENT Coordinate Information (Spatial):
COMMENT ===================================================================
COMMENT -------------------------------------------------------------------
COMMENT DIRBE Pixel number (resolution 9)
TTYPE1 = 'Pixel_no' / pipeline fieldname = Pixel_no
TUNIT1 = ' ' /
TFORM1 = '1J ' /
COMMENT ---------------------------------------------------------------------
COMMENT ===================================================================
COMMENT Pixel Indexing Information:
COMMENT ===================================================================
COMMENT -------------------------------------------------------------------
COMMENT Number of the last row within the corresponding DCAF
COMMENT binary table which contains information for this pixel number.
COMMENT Row numbers are counted starting at 1.
COMMENT
TTYPE2 = 'LastRow ' / pipeline fieldname = last_data_record
TUNIT2 = ' ' /
TFORM2 = '1J ' /
COMMENT --------------------------------------------------------------------
COMMENT Mission week numbers for which data are available on this
COMMENT pixel. Stored as a 6 byte (48 bit) vector, where each bit
COMMENT corresponds to a specific week number in the mission.
COMMENT Bit numbers start with 0 as the LSB in byte 1, 8 as the
COMMENT LSB in byte 2, etc., and are related to mission week
COMMENT numbers as follows:
COMMENT Week number = bit number + 4
COMMENT Thus, for example, if the LSB in byte 3 is set to 1, then
COMMENT data are available for mission week 20. Week numbers range
COMMENT from 4 to 44. A list of week numbers and their corresponding
COMMENT times is provided in the Explanatory Supplement.
COMMENT
TTYPE3 = 'WksObs ' / pipeline fieldname = weeks_observed
TUNIT3 = ' ' /
TFORM3 = '6B ' /
TDIM3 = '(6) ' /
COMMENT --------------------------------------------------------------------
END