diff --git a/modules/util/lon_lat_grid.py b/modules/util/lon_lat_grid.py
index cae5bcf564ffc39a8cafda11a83bdd9fb9b56df3..339bce13035308c3eee44daef111b28df3bedcf1 100644
--- a/modules/util/lon_lat_grid.py
+++ b/modules/util/lon_lat_grid.py
@@ -15,7 +15,7 @@ class MyGenericException(Exception):
 
 
 # For nearest neighbor/interpolation of a function whose domain is a geostationary satellite fixed grid.
-# This is a utility wrapper for sklearn.neighbors.BallTree
+# This is a utility wrapper for sklearn.neighbors.BallTree adapted for 2D manifold.
 class LonLatGrid:
     # grd_lons, grd_lats: the longitude, latitude of each grid point (must be 2D grids), must have same shape
     # Incoming longitude must be in range: 0 - 360 degrees