netcdf time_prec {
dimensions:
	time = 12 ;
variables:
	float time(time) ;
		time:long_name = "observation time" ;
		time:units = "days since yyyy-01-01 00:00:00" ;
		time:calendar = "noleap" ;

// global attributes:
data:

 time = 14, 46, 74, 105, 135, 166, 196, 227, 258, 288, 319, 349 ;
}