WMAP FITS Header

Primary Header

SIMPLE  =                    T / file does conform to FITS standard
BITPIX  =                    8 / 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 is defined in 'Astronomy
COMMENT   and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H
DATE    = '2003-01-10T00:00:00' /file creation date (YYYY-MM-DDThh:mm:ss UT)
TELESCOP= 'MAP     '           / Microwave Anisotropy Probe
OBJECT  = 'ALL-SKY '           / Portion of sky given
EQUINOX =               2000.0 / Equinox of coordinates
COMMENT   This file contains the MAP MEM derived K band free-free
COMMENT   foreground based on the first year of observations
REFERENC= 'MAP Explanatory Supplement: http://lambda.gsfc.nasa.gov/
VERSION = 'PASS 1  '           / Internal MAP Version
STARTGMT= '20012220000000000000' / Start time of TOD used
ENDGMT  = '20022212359000000000' / End time of TOD used
FREQ    = 'K band  '           / Frequency band
STOKES  = 'Intensity'          / i, q, or u
RESOLUTN=                    8 / Resolution index
SKYCOORD= 'Galactic'           / Coordinate system
GALMASK = '/map/data/flight/pass1/ref/proc_mask_K_p8_v1_unsm.fits' / Galaxy mask
PLANETS = 'MJSUN   '           / Planets avoided
COMMENT Planet codes: [M]ars, [J]upiter, [S]aturn, [U]ranus, [N]eptune
SHIELDS = 'S       '           / Shield angle avoidance
COMMENT Shield codes: [S]un, [E]arth, [M]oon
PIXTYPE = 'HEALPIX '           / Pixel algorithm
ORDERING= 'NESTED  '           / Ordering scheme
NSIDE   =                  256 / Resolution parameter
NPIX    =               786432 / # of pixels
FIRSTPIX=                    0 / First pixel (0 based)
LASTPIX =               786421 / Last pixel (0 based)
END

Archive Map Table

XTENSION= 'BINTABLE'           /binary table extension
BITPIX  =                    8 /8-bit bytes
NAXIS   =                    2 /2-dimensional binary table
NAXIS1  =                    8 /width of table in bytes
NAXIS2  =               786432 /number of rows in table
PCOUNT  =                    0 /size of special data area
GCOUNT  =                    1 /one data group (required keyword)
TFIELDS =                    2 /number of fields in each row
TTYPE1  = 'TEMPERATURE'        /label for field   1
TFORM1  = '1E      '           /data format of field: 4-byte REAL
TUNIT1  = 'mK, antenna'        /physical unit of field
TTYPE2  = 'N_OBS   '           /label for field   2
TFORM2  = '1E      '           /data format of field: 4-byte REAL
TUNIT2  = 'counts  '           /physical unit of field
EXTNAME = 'Archive Map Table'  /name of this binary table extension
DATE    = '2003-01-10T00:00:00' /Table/MAP creation date
PIXTYPE = 'HEALPIX '           /Pixel algorithm
ORDERING= 'NESTED  '           /Ordering scheme
NSIDE   =                  256 /Resolution parameter
NPIX    =               786432 /# of pixels
FIRSTPIX=                    0 /First pixel (0 based)
LASTPIX =               786421 /Last pixel (0 based)
COMMENT   Temperature is antenna temperature
COMMENT   N_obs is set to 1 for all pixels. The N_obs field
COMMENT    is filled only to provide consistent map format
END