diff --git a/modules/util/viirs_surfrad.py b/modules/util/viirs_surfrad.py
index 45b88750d4063c8ec87b200ab7cfa3405f0580ca..e338856ddf63a018d355270bf3e3bdca6e7b0aa4 100644
--- a/modules/util/viirs_surfrad.py
+++ b/modules/util/viirs_surfrad.py
@@ -148,7 +148,7 @@ def run_all(directory, out_directory, day_night='ANY', pattern='clavrx_*.nc', st
             if len(train_tiles_m) == 0 and len(valid_tiles_m) == 0:
                 continue
 
-            if (f_cnt % 5) == 0:
+            if (f_cnt % 20) == 0:
                 num_valid_samples = 0
                 if len(valid_tiles_m) > 0:
                     valid_i = np.stack(valid_tiles_i)