int[][]tb = timeBounds.get( testdata[ i +2] );
try {
System.out.println("Open "+grib);
NetcdfFile ncf = NetcdfFile.open( grib );
Variable var = ncf.findVariable( parameter );
Dimension dim = var.getDimension( 0 );
String bounds = dim.getName() +"_bounds";
Variable interval = ncf.findVariable( bounds );
Array data = interval.read();
IndexIterator iter = data.getIndexIterator();