diff --git a/lib/xmet/bufr.py b/lib/xmet/bufr.py
index 844b47e..c0be9dd 100644
--- a/lib/xmet/bufr.py
+++ b/lib/xmet/bufr.py
@@ -158,11 +158,12 @@ class BUFRSounding(Sounding):
 
     @staticmethod
     def valid_by_timestamp(station: str, timestamp: datetime.datetime) -> Self:
-        epoch     = timestamp.timestamp()
-        request   = BUFRSounding.create_request(station)
+        epoch = timestamp.timestamp()
 
+        request   = BUFRSounding.create_request(station)
         datatimes = DataAccessLayer.getAvailableTimes(request)
-        by_delta  = dict()
+
+        by_delta = dict()
 
         for datatime in datatimes:
             ts    = datatime.getRefTime().time / 1000.0