diff --git a/modules/aeolus/datasource.py b/modules/aeolus/datasource.py
index c512ffb6780f00615770de7a8de118295257b3e9..b465820bab71c250751c5fd49a065d843639c1a2 100644
--- a/modules/aeolus/datasource.py
+++ b/modules/aeolus/datasource.py
@@ -146,7 +146,7 @@ class CLAVRx_VIIRS(Files):
         # so = re.search('\\d{11}', toks[4])
         # dt_str = so.group()
         dt_str = toks[1] + toks[2]
-        dto = datetime.datetime.strptime(dt_str, '%Y%j%H%M').replace(tzinfo=timezone.utc)
+        dto = datetime.datetime.strptime(dt_str, 'A%Y%j%H%M').replace(tzinfo=timezone.utc)
         return dto
 
     def get_parameters(self):