function [sortedCatalog] = sortByTime(catalog)
  timeColIndex = find(strcmp('Time', {catalog.field}));
  if ~isempty(timeColIndex)
      [~, sortedIndexes] = sortrows(catalog(timeColIndex).val);
      for i=1:length(catalog)
          catalog(i).val = catalog(i).val(sortedIndexes);
      end
  end
  sortedCatalog = catalog;
end