netcdf tst_brecs {
dimensions:
	time = UNLIMITED ; // (20 currently)
variables:
	byte b1(time) ;
	byte b2(time) ;
	byte b3(time) ;
data:

 b1 = 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 ;

 b2 = 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 ;

 b3 = 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 ;
}