Per #2833, when definng TcrmwData:range_max_km, divide by n_range - 1…

… since the range values start at 0.

src/tools/tc_utils/tc_diag/tc_diag.cc

@@ -17,6 +17,7 @@
 //   000    09/27/22  Halley Gotway New
 //   001    08/17/23  Halley Gotway MET #2609 handle missing data
 //   002    10/24/23  Halley Gotway MET #2550 enhance diagnostics
+//   003    03/11/24  Halley Gotway MET #2833 range/azimuth grid
 //
 ////////////////////////////////////////////////////////////////////////
 
@@ -2203,7 +2204,9 @@ void TmpFileInfo::setup_nc_file(const DomainInfo &di,
    // Set grid center
    d.lat_center   =      pnt_ptr->lat();
    d.lon_center   = -1.0*pnt_ptr->lon(); // degrees east to west
-   d.range_max_km = di.delta_range_km * d.range_n;
+
+   // MET #2833 divide by n-1 since the ranges begin at 0 km
+   d.range_max_km = di.delta_range_km * (d.range_n - 1);
 
    // Instantiate the grid
    grid_out.set(d);

src/tools/tc_utils/tc_rmw/tc_rmw.cc

@@ -19,6 +19,7 @@
 //   002   07/06/22  Howard Soh      METplus-Internal #19 Rename main to met_main
 //   003   09/28/22  Prestopnik      MET #2227 Remove namspace std and netCDF from header files
 //   004   04/26/23  Halley Gotway   MET #2523 Reorder NetCDF dimensions
+//   005   03/11/24  Halley Gotway   MET #2833 range/azimuth grid
 //
 ////////////////////////////////////////////////////////////////////////
 
@@ -688,9 +689,11 @@ void process_fields(const TrackInfoArray& tracks) {
         grid_data.lat_center = point.lat();
         grid_data.lon_center = -1.0*point.lon(); // internal sign change
 
+        // MET #2833 divide by n-1 since the ranges begin at 0 km
         // RMW is same as mrd()
         grid_data.range_max_km = conf_info.rmw_scale *
-            point.mrd() * tc_km_per_nautical_miles * conf_info.n_range;
+           point.mrd() * tc_km_per_nautical_miles *
+           (conf_info.n_range - 1);
         tcrmw_grid.clear();
         tcrmw_grid.set_from_data(grid_data);
         grid.clear();