change our default tiling prefix to match Jordan's suggestion

gridded_glm/PACKAGE_README.md

@@ -71,7 +71,7 @@ Example Gridded GLM product filename: `CG_GLM-L2-GLMF-M3_G16_s20192991759000_e20
 ​
 A set of tiles can optionally be created for each Gridded GLM file. The tiles are also NetCDF4 files and designed to be compatible with AWIPS. Tiles covering geographic areas without lightning activity are omitted.
 ​
-Example tile filename: `CG_GLM-L2-GLMF-M3_G16_T15_20191026180000.nc`
+Example tile filename: `CSPP_OR_GLM-L2-GLMF-M3_G16_T15_20191026180000.nc`
 ​
 ​
 ## EXAMPLES

gridded_glm/libexec/_minute_gridder.py

@@ -87,8 +87,8 @@ def create_parser():
                         "of data is available (default: off)")
     parser.add_argument('--system-environment-prefix', default="CG",
                         help="set the system environment prefix for the output grids (default: CG)")
-    parser.add_argument('--system-environment-prefix-tiles', default="CG",
-                        help="set the system environment prefix for the output tiles (default: CG)")
+    parser.add_argument('--system-environment-prefix-tiles', default="CSPP_OR",
+                        help="set the system environment prefix for the output tiles (default: CSPP_OR)")
     # from Requirements: "Input is one or more GLM LCFA (L2+) files in mission standard format (nominally three 20-second input files)"
     parser.add_argument(dest='filenames', metavar='filename', nargs='+')
     return parser