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2. OUTPUT : Either yes or no, indicating whether the field is to be written to the metgridoutput files or not. Default value is yes.3. MANDATORY : Either yes or no, indicating whether the field is required forsuccessful completion of metgrid. Default value is no.4. OUTPUT_NAME : A character string giving the name that the interpolated fieldshould be output as. When a value is specified for output_name, the interpolation optionsfrom the table section pertaining to the field with the specified name are used. Thus, theeffects of specifying output_name are two-fold: The interpolated field is assigned thespecified name before being written out, and the interpolation methods are taken from thesection pertaining to the field whose name matches the value assigned to theoutput_name keyword. No default value.5. FROM_INPUT : A character string used to compare against the values in the fg_namenamelist variable; if from_input is specified, the containing table section will only beused when the time-varying input source has a filename that contains the value offrom_input as a substring. Thus, from_input may be used to specify differentinterpolation options for the same field, depending on which source of the field is beingprocessed. No default value.6. OUTPUT_STAGGER : The model grid staggering to which the field should beinterpolated. For ARW, this must be one of U, V, and M; for NMM, this must be one of HHand VV. Default value for ARW is M; default value for NMM is HH.7. IS_U_FIELD : Either yes or no, indicating whether the field is to be used as the windU-component field. For ARW, the wind U-component field must be interpolated to the Ustaggering (output_stagger=U); for NMM, the wind U-component field must beinterpolated to the V staggering (output_stagger=VV). Default value is no.8. IS_V_FIELD : Either yes or no, indicating whether the field is to be used as the windV-component field. For ARW, the wind V-component field must be interpolated to the Vstaggering (output_stagger=V); for NMM, the wind V-component field must beinterpolated to the V staggering (output_stagger=VV). Default value is no.9. INTERP_OPTION : A sequence of one or more names of interpolation methods to beused when horizontally interpolating the field. Available interpolation methods are:average_4pt, average_16pt, wt_average_4pt, wt_average_16pt,nearest_neighbor, four_pt, sixteen_pt, search, average_gcell(r); for the gridcell average method (average_gcell), the optional argument r specifies the minimumratio of source data resolution to simulation grid resolution at which the method will beapplied; unless specified, r = 0.0, and the option is used for any ratio. When a sequenceof two or more methods are given, the methods should be separated by a + sign. Defaultvalue is nearest_neighbor.WRF-NMM V3: User’s Guide 3-44