set the default tile prefix to CG

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="OR",
-                        help="set the system environment prefix for the output tiles (default: OR)")
+    parser.add_argument('--system-environment-prefix-tiles', default="CG",
+                        help="set the system environment prefix for the output tiles (default: CG)")
     # 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