allow unset weather provider

aman/sys/WeatherModel.py

@@ -98,6 +98,9 @@ class WeatherModel:
         return ias * math.sqrt(1.225 / self.densityModel(altitude).item())
 
     def updateWindModel(self):
+        if None == self.Weather or None == self.Weather.Provider:
+            return
+
         if None == self.LastWeatherUpdate or self.LastWeatherUpdate != self.Weather.Provider.UpdateTime:
             self.MinimumAltitude = 1000000
             self.MaximumAltitude = -1

aman/sys/Worker.py

@@ -27,7 +27,10 @@ class Worker(Thread):
         self.PerformanceData = performance
         self.UpdateLock = Lock()
         self.ReportQueue = {}
-        self.WeatherModel = WeatherModel(configuration.GaforId, weather)
+        if None != weather:
+            self.WeatherModel = WeatherModel(configuration.GaforId, weather)
+        else:
+            self.WeatherModel = WeatherModel(0, None)
         self.RecedingHorizonControl = RecedingHorizonControl(configuration.RecedingHorizonControl)
         self.Euroscope = euroscope