url      = "https://nomads.ncep.noaa.gov:9090/dods/gfs_0p25/gfs20200714/"
  filename = "gfs_0p25_00z"
  
  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->apcpsfc
	printVarSummary(prec)
	printMinMax(prec,0)
;	
	tempsfc = f->tmpsfc		;surface temperature [k]
	printVarSummary(tempsfc)
	printMinMax(tempsfc,0)

	temp2m = f->tmp2m		;2 m above ground temperature [k]
	printVarSummary(temp2m)
	printMinMax(temp2m,0)
	
	tempmax2m = f->tmax2m		;2 m above ground maximum temperature [k]
	printVarSummary(tempmax2m)
	printMinMax(tempmax2m,0)
	
	tempmin2m = f->tmin2m		;2 m above ground maximum temperature [k]
	printVarSummary(tempmin2m)
	printMinMax(tempmin2m,0)
	
  end if