   File format : GRIB
    -1 : Institut Source   Steptype Levels Num    Points Num Dtype : Parameter ID
     1 : ECMWF    unknown  instant       1   1     35718   1  P16  : 151.128       
   Grid coordinates :
     1 : gaussian reduced         : points=35718  nlat=160  np=80
                              lat : 89.14152 to -89.14152 degrees_north
   Vertical coordinates :
     1 : surface                  : levels=1
   Time coordinate :  1 step
     RefTime =  1958-09-01 00:00:00  Units = hours  Calendar = proleptic_gregorian
  YYYY-MM-DD hh:mm:ss  YYYY-MM-DD hh:mm:ss  YYYY-MM-DD hh:mm:ss  YYYY-MM-DD hh:mm:ss
  1958-09-01 00:00:00
