diff --git a/modules/util/viirs.py b/modules/util/viirs.py
index ce6d533e26bbf41a013047ae5b9d0135ef829505..9092d04005b1bec7b31b95bf3f4dcca1c3c66582 100644
--- a/modules/util/viirs.py
+++ b/modules/util/viirs.py
@@ -106,7 +106,7 @@ def run_mean_std(directory):
         if not p.is_dir():
             continue
         cnt += 1
-        mod_files = glob.glob(directory+p.name+'/'+'*.uwssec.nc')
+        mod_files = glob.glob(directory+p.name+'/'+'VNP02MOD*.uwssec.nc')
 
         for idx, mfile in enumerate(mod_files):
             if idx % 8 == 0: