XTENSION= 1  1  1  0                                                           
BITPIX  = 2  1  1  0                                                           
NAXIS   = 3  1  1  0                                                           
NAXIS1  = 4  1  1  0                                                           
NAXIS2  = 5  1  1  0                                                           
PCOUNT  = 6  1  1  0                                                           
GCOUNT  = 7  1  1  0                                                           
TFIELDS = 8  1  1  0                                                           
END     = -1 1  1  0                                                           
