diff --git a/modules/util/viirs_l1b_l2.py b/modules/util/viirs_l1b_l2.py
index 8e2ca192574e35100a401645d82a88de8eb23b60..d516d3626de8ce895fd5ce00c10603e2fac322b1 100644
--- a/modules/util/viirs_l1b_l2.py
+++ b/modules/util/viirs_l1b_l2.py
@@ -1,6 +1,6 @@
 import numpy as np
 import h5py
-from util.util import get_grid_values, get_grid_values_all, is_night, compute_lwc_iwc
+from util.util import get_grid_values, get_grid_values_all, is_night, is_day, compute_lwc_iwc
 import glob
 import os
 from aeolus.datasource import CLAVRx_VIIRS
@@ -232,6 +232,7 @@ def scan(directory):
             h5f.close()
             continue
 
+        # if is_day(solzen) and moon_phase(ts):
         if is_night(solzen) and moon_phase(ts):
             print(file)
         h5f.close()