// global attributes
        :Conventions = "CF-1.0";                                 // do not change
        :Metadata_Conventions = "Unidata Dataset Discovery v1.0";// do not change

        // these describe the data creation, name the creator(s), and support online discovery.
        // see http://www.unidata.ucar.edu/software/netcdf-java/formats/DataDiscoveryAttConvention.html
        // fill in and revise values as needed for your data.
        :title = " " ;              //short description of what is in the dataset
        :summary = " ";             //a sentence or paragraph describing the dataset
        :keywords = " ";            //a comma-separated list of keywords and phrases
        :creator_name = " " ;
        :creator_url = " " ;
        :creator_email = " " ;
        :institution = " ";         // where produced
        :acknowledgment=" "; //  support for the project that produced this data
        :references = " ";//publications or web references that describe data or its production
        :history = " ";   // audit trail for modifications, with dates, version numbers, etc
        :comment = " ";   // miscellaneous information
        :geospatial_lat_min = "" ;
        :geospatial_lat_max = "" ;
        :geospatial_lat_units = "degrees_north" ;
        :geospatial_lat_resolution = "0.01" ;
        :geospatial_lon_min = "" ;
        :geospatial_lon_max = "" ;
        :geospatial_lon_units = "degrees_east" ;
        :geospatial_lon_resolution = "" ;
        :geospatial_vertical_min = "" ; // relative to surface of earth
        :geospatial_vertical_max = "" ;
        :geospatial_vertical_units = "kilometers" ;
        :geospatial_vertical_resolution = "" ;
        :geospatial_vertical_positive = "down" ;
        :time_coverage_start = "1999-07-04T22:30" ;
        :time_coverage_end = "25 days since 1999-07-04" ;
        :time_coverage_resolution = "sec" ;