diff --git a/modules/util/lon_lat_grid.py b/modules/util/lon_lat_grid.py
index 339bce13035308c3eee44daef111b28df3bedcf1..dc7724295abacd90a5b5763b3200cfc4f2ef6616 100644
--- a/modules/util/lon_lat_grid.py
+++ b/modules/util/lon_lat_grid.py
@@ -7,6 +7,7 @@ from scipy import linalg
 from scipy.spatial import KDTree
 from sklearn.neighbors import BallTree
 from util.util import haversine_np
+from scipy.ndimage import gaussian_filter
 
 
 class MyGenericException(Exception):
@@ -14,8 +15,9 @@ class MyGenericException(Exception):
         self.message = message
 
 
+# Author: T.Rink
 # For nearest neighbor/interpolation of a function whose domain is a geostationary satellite fixed grid.
-# This is a utility wrapper for sklearn.neighbors.BallTree adapted for 2D manifold.
+# This is a utility wrapper for sklearn.neighbors.BallTree adapted for 2D manifold (Longitude, Latitude).
 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