XTENSION= 'BINTABLE'           / Written by IDL:  Wed May 22 09:38:50 2019
BITPIX  =                    8 / 
NAXIS   =                    2 / Binary table
NAXIS1  =                 4096 / Number of bytes per row
NAXIS2  =                  768 / Number of rows
PCOUNT  =                    0 / Random parameter count
GCOUNT  =                    1 / Group count
TFIELDS =                    1 / Number of columns
TFORM1  = '1024E   '           / Real*4 (floating point)
TTYPE1  = 'UNKNOWN1'           / unknown content
PIXTYPE = 'HEALPIX '           / HEALPIX pixelisation
ORDERING= 'NESTED  '           / Pixel ordering scheme, either RING or NESTED
NSIDE   =                  256 / Healpix resolution parameter
OBJECT  = 'FULLSKY '           / Sky coverage, either FULLSKY or PARTIAL
INDXSCHM= 'IMPLICIT'           / indexing : IMPLICIT or EXPLICIT
GRAIN   =                    0 / GRAIN = 0: No index,
COMMENT                  GRAIN =1: 1 pixel index for each pixel,
COMMENT                  GRAIN >1: 1 pixel index for Grain consecutive pixels
COORDSYS= 'G       '           / 
