url      = "https://thredds.ucar.edu/thredds/dodsC/grib/NCEP/GFS/Global_0p25deg/"
  filename = "GFS_Global_0p25deg_20200714_0000.grib2"
  
  exists = isfilepresent(url+filename)
  if(.not.exists) then
	print("OPeNDAP test unsuccessful.")
	print("Either the file doesn't exist, or NCL does")
	print("not have OPeNDAP cabilities on this system.")
  else
	f = addfile(url + filename,"r")
	vnames = getfilevarnames(f)
	print(vnames)

	T = f->time
;	print(T)
	T_Conv = cd_calendar(T, 3)
;	print(T_Conv)

	prec = f->Total_precipitation_surface_Mixed_intervals_Accumulation
	printVarSummary(prec)
	printMinMax(prec,0)
	
	tempsfc = f->Temperature_surface
	printVarSummary(tempsfc)
	printMinMax(tempsfc,0)
	
	temphag = f->Temperature_height_above_ground
	printVarSummary(temphag)
	printMinMax(temphag,0)

	tempap = f->Apparent_temperature_height_above_ground
	printVarSummary(tempap)
	printMinMax(tempap,0)

	tempmax = f->Maximum_temperature_height_above_ground_Mixed_intervals_Maximum
	printVarSummary(tempmax)
	printMinMax(tempmax,0)

   	tempmin = f->Minimum_temperature_height_above_ground_Mixed_intervals_Minimum
	printVarSummary(tempmin)
	printMinMax(tempmin,0)

  end if