v.addAttribute( new Attribute("long_name", longName));
v.addAttribute( new Attribute("abbrev", abbrev));
v.addAttribute( new Attribute("missing_value", firstRay.getMissingData()));
v.addAttribute( new Attribute("signal_below_threshold", firstRay.getDatatypeRangeFoldingThreshhold(abbrev)));
v.addAttribute( new Attribute("scale_factor", firstRay.getDatatypeScaleFactor(abbrev)));
v.addAttribute( new Attribute("add_offset", firstRay.getDatatypeAddOffset(abbrev)));
// v.addAttribute( new Attribute("_Unsigned", "false"));
v.addAttribute( new Attribute("range_folding_threshold" ,firstRay.getDatatypeRangeFoldingThreshhold(abbrev)));
List<Dimension> dim2 = new ArrayList<Dimension>();