use the new member structure to provide the data

aman/app.py

@@ -14,11 +14,14 @@ from aman.config.RunwaySequencing import RunwaySequencing
 
 class InboundEncoder(JSONEncoder):
     def default(self, o):
+        if None == o.PlannedArrivalTime or None == o.EnrouteArrivalTime or None == o.PlannedRunway:
+            return {}
+
         pta = str(o.PlannedArrivalTime)
         delimiter = pta.find('.')
         if -1 == delimiter:
             delimiter = pta.find('+')
-        delta = int((o.PlannedArrivalTime - o.InitialArrivalTime).total_seconds() / 60.0);
+        delta = int((o.PlannedArrivalTime - o.EnrouteArrivalTime).total_seconds() / 60.0);
         return { 'callsign' : o.Callsign, 'fixed' : o.FixedSequence, 'runway' : o.PlannedRunway.Name, 'pta' : pta[0:delimiter], 'delay' : delta }
 
 class RunwaySequencingEncoder(JSONEncoder):