diff --git a/modules/util/viirs_surfrad.py b/modules/util/viirs_surfrad.py
index fd25417f0d687bb7a5837d8fc9b2dbbbb30f8dfe..8b2e6b0e5e15fe1653c43c85f2d9bfeff9ec6a5c 100644
--- a/modules/util/viirs_surfrad.py
+++ b/modules/util/viirs_surfrad.py
@@ -90,7 +90,7 @@ def run_all(directory, out_directory, day_night='ANY', pattern='clavrx_*.nc', st
 
             try:
                 run(h5f, data_params, data_train_tiles, data_valid_tiles, label_params, label_train_tiles, label_valid_tiles,
-                    num_keep_x_tiles=num_keep_x_tiles, tile_width=64, kernel_size=3, day_night=day_night)
+                    num_keep_x_tiles=num_keep_x_tiles, tile_width=64, kernel_size=5, day_night=day_night)
             except Exception as e:
                 print(e)
                 h5f.close()