netcdf foo {
dimensions:
	lat = 10 ;
	lon = 5 ;
	time = UNLIMITED ; // (0 currently)
variables:
	int lat(lat) ;
		lat:units = "degrees_north" ;
	int lon(lon) ;
		lon:units = "degrees_east" ;
	int time(time) ;
		time:units = "seconds" ;
	float z(time, lat, lon) ;
		z:units = "meters" ;
		z:valid_range = 0., 5000. ;
	float t(time, lat, lon) ;
	double p(time, lat, lon) ;
		p:_FillValue = -999. ;
	int rh(time, lat, lon) ;
		rh:_FillValue = -1 ;
}