diff --git a/modules/util/viirs_l1b_l2.py b/modules/util/viirs_l1b_l2.py
index 64545f2b1b6e5625f2d18001a6a94cab8ed79c58..6fc657c17fc59521f79d1dbc10e155d16fe1599f 100644
--- a/modules/util/viirs_l1b_l2.py
+++ b/modules/util/viirs_l1b_l2.py
@@ -50,8 +50,8 @@ def run_all(directory, out_directory):
         f_cnt = 0
 
         for idx, data_f in enumerate(data_files):
-            # if idx % 8 == 0:  # if we want to skip some files
-            if True:
+            if idx % 4 == 0:  # if we want to skip some files
+            # if True:
                 # w_o_ext, ext = os.path.splitext(data_f)
                 # pname, fname = os.path.split(data_f)
                 # toks = fname.split('.')
@@ -124,6 +124,9 @@ def run_all(directory, out_directory):
                 data_train_tiles = []
 
                 print('   file # done: ', cnt)
+                print('num_train_samples, num_valid_samples: ', num_train_samples, num_valid_samples)
+                total_num_train_samples += num_train_samples
+                total_num_test_samples += num_valid_samples
 
                 f_cnt = 0
             else: