--- header unit 0: primary ---
SIMPLE = T / conforms to FITS standard
BITPIX = 8 / array data type
NAXIS = 0 / number of array dimensions
EXTEND = T
--- header unit 1: binary table ---
XTENSION = 'BINTABLE' / binary table extension
BITPIX = 8 / array data type
NAXIS = 2 / number of array dimensions
NAXIS1 = 2048 / length of dimension 1
NAXIS2 = 192 / length of dimension 2
PCOUNT = 0 / number of group parameters
GCOUNT = 1 / number of groups
TFIELDS = 1 / number of table fields
TTYPE1 = 'I'
TFORM1 = '1024I'
PIXTYPE = 'HEALPIX' / HEALPIX pixelisation
ORDERING = 'NESTED' / Pixel ordering scheme, either RING or NESTED
COORDSYS = 'C' / Ecliptic, Galactic or Celestial (equatorial)
EXTNAME = 'xtension' / name of this binary table extension
NSIDE = 128 / Resolution parameter of HEALPIX
FIRSTPIX = 0 / First pixel # (0 based)
LASTPIX = 196607 / Last pixel # (0 based)
INDXSCHM = 'IMPLICIT' / Indexing: IMPLICIT or EXPLICIT
OBJECT = 'FULLSKY' / Sky coverage, either FULLSKY or PARTIAL