netcdf mdtrj {
dimensions:
	frame = UNLIMITED ; // (10 currently)
	spatial = 3 ;
	atom = 28 ;
	cell_spatial = 3 ;
	label = 5 ;
	cell_angular = 3 ;
variables:
	float time(frame) ;
		time:units = "picosecond" ;
	char spatial(spatial) ;
	float coordinates(frame, atom, spatial) ;
		coordinates:units = "angstrom" ;
	float velocities(frame, atom, spatial) ;
		velocities:units = "angstrom/picosecond" ;
		velocities:scale_factor = 20.455 ;
	char cell_spatial(cell_spatial) ;
	char cell_angular(cell_angular, label) ;
	double cell_lengths(frame, cell_spatial) ;
		cell_lengths:units = "angstrom" ;
	double cell_angles(frame, cell_angular) ;
		cell_angles:units = "degree" ;

// global attributes:
		:title = "netCDF output test" ;
		:application = "AMBER" ;
		:program = "sander" ;
		:programVersion = "14.0" ;
		:Conventions = "AMBER" ;
		:ConventionVersion = "1.0" ;
}