fix the issues with the time delta estimation

aman/types/Inbound.py

@@ -14,7 +14,7 @@ class Inbound:
         self.Callsign = report.aircraft.callsign
         self.CurrentPosition = report.position
         self.ReportTime = datetime.strptime(report.reportTime + '+0000', '%Y%m%d%H%M%S%z').replace(tzinfo = pytz.UTC)
-        self.InitialArrivalTime = None
+        self.EnrouteArrivalTime = None
         self.RequestedRunway = None
         self.PlannedArrivalTime = None
         self.PlannedRunway = None