DSET ^cfsr.pna.9910.dat
UNDEF -999.
*options little_endian
TITLE Daily 500mb PNA index (NOT CPC)
XDEF 1 linear 1 1
YDEF 1 linear 1 1
ZDEF 1 linear 1 1
TDEF 4383 linear 01JAN1999 1dy
VARS 1
index 0 99 PNA daily index
ENDVARS