calculate times for all possible runways -> allows lookup for later optimization

aman/types/ArrivalTime.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python
+
+from datetime import datetime, timedelta
+
+from aman.types.ArrivalRoute import ArrivalRoute
+
+class ArrivalTime:
+    def __init__(self, **kargs):
+        self.Star = None
+        self.MaximumTimeToGain = None
+        self.FlightTimeUntilIaf = None
+        self.FlightTimeUntilTouchdown = None
+        self.InitialArrivalTime = None
+        self.EarliestArrivalTime = None
+
+        for key, value in kargs.items():
+            if 'ttg' == key:
+                if True == isinstance(value, timedelta):
+                    self.MaximumTimeToGain = value
+                elif True == isinstance(value, (int, float)):
+                    self.MaximumTimeToGain = timedelta(seconds = float(value))
+                else:
+                    raise Exception('Invalid type for ttg')
+            elif 'star' == key:
+                if True == isinstance(value, ArrivalRoute):
+                    self.Star = value
+                else:
+                    raise Exception('Invalid type for star')
+            elif 'ita' == key:
+                if True == isinstance(value, datetime):
+                    self.InitialArrivalTime = value
+                else:
+                    raise Exception('Invalid type for ita')
+            elif 'earliest' == key:
+                if True == isinstance(value, datetime):
+                    self.EarliestArrivalTime = value
+                else:
+                    raise Exception('Invalid type for earliest')
+            elif 'touchdown' == key:
+                if True == isinstance(value, timedelta):
+                    self.FlightTimeUntilTouchdown = value
+                else:
+                    raise Exception('Invalid type for touchdown')
+            elif 'entry' == key:
+                if True == isinstance(value, timedelta):
+                    self.FlightTimeUntilIaf = value
+                else:
+                    raise Exception('Invalid type for entry')
+            else:
+                raise Exception('Unknown key: ' + key)

aman/types/Inbound.py

@@ -10,14 +10,33 @@ from aman.config.AirportSequencing import AirportSequencing
 from aman.formats.SctEseFormat import SctEseFormat
 from aman.sys.WeatherModel import WeatherModel
 from aman.types.PerformanceData import PerformanceData
+from aman.types.ArrivalRoute import ArrivalRoute
+from aman.types.ArrivalTime import ArrivalTime
+from aman.types.Runway import Runway
 from aman.types.Waypoint import Waypoint
 
 class Inbound:
+    def findArrivalRoute(self, runway : Runway, navData : SctEseFormat):
+        for arrivalRunway in navData.ArrivalRoutes:
+            if arrivalRunway == runway.Name:
+                stars = navData.ArrivalRoutes[arrivalRunway]
+                for star in stars:
+                    if 0 != len(star.Route) and self.Report.initialApproachFix == star.Iaf.Name:
+                        return star
+        return None
+
     def __init__(self, report : AircraftReport_pb2.AircraftReport, sequencingConfig : AirportSequencing, navData : SctEseFormat,
                  performanceData : PerformanceData, weatherModel : WeatherModel):
         self.Report = report
         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.EarliestArrivalTime = None
+        self.EstimatedArrivalTime = None
+        self.EstimatedStarEntryTime = None
+        self.PlannedRunway = None
+        self.PlannedStar = None
+        self.ArrivalCandidates = {}
 
         # search performance data -> fallback to A320
         if self.Report.aircraft.type in performanceData.Aircrafts:
@@ -25,89 +44,76 @@ class Inbound:
         if None == self.PerformanceData:
             self.PerformanceData = performanceData.Aircrafts['A320']
 
-        self.findArrivalRunway(sequencingConfig)
-        self.findArrivalRoute(navData)
+        # calculate the timings for the different arrival runways
+        for identifier in sequencingConfig.ActiveArrivalRunways:
+            star = self.findArrivalRoute(identifier.Runway, navData)
 
-        flightTime, flightTimeUntilIaf, trackmiles = self.secondsUntilTouchdown(weatherModel)
+            if None != star:
+                flightTime, flightTimeUntilIaf, trackmiles = self.arrivalEstimation(identifier.Runway, star, weatherModel)
 
-        # calculate the maximum time to gain (assumption: 10% speed increase by acceleration and shortcuts)
-        avgSpeed = trackmiles / (float(flightTime.seconds) / 3600.0)
-        self.MaximumTimeToGain = flightTime - timedelta(minutes = (trackmiles / (avgSpeed * 1.1)) * 60)
+                avgSpeed = trackmiles / (float(flightTime.seconds) / 3600.0)
+                ttg = flightTime - timedelta(minutes = (trackmiles / (avgSpeed * 1.1)) * 60)
+                ita = self.ReportTime + flightTime
+                earliest = ita - ttg
 
-        # calculate the different arrival times
-        self.InitialArrivalTime = self.ReportTime + flightTime
-        self.EarliestArrivalTime = self.InitialArrivalTime - self.MaximumTimeToGain
-        self.EstimatedArrivalTime = self.InitialArrivalTime
-        self.EstimatedStarEntryTime = None
+                self.ArrivalCandidates[identifier.Runway.Name] = ArrivalTime(ttg = ttg, star = star, ita = ita, earliest = earliest,
+                                                                             entry = flightTimeUntilIaf, touchdown = flightTime)
 
-    def findArrivalRunway(self, sequencingConfig : AirportSequencing):
-        self.PlannedRunway = None
+        # calculate the first values for later plannings
+        for candidate in self.ArrivalCandidates:
+            if None == self.EarliestArrivalTime or self.ArrivalCandidates[candidate].EarliestArrivalTime < self.EarliestArrivalTime:
+                self.InitialArrivalTime = self.ArrivalCandidates[candidate].InitialArrivalTime
+                self.EarliestArrivalTime = self.ArrivalCandidates[candidate].EarliestArrivalTime
+                self.EstimatedStarEntryTime = self.ReportTime + self.ArrivalCandidates[candidate].FlightTimeUntilIaf
+                self.PlannedStar = self.ArrivalCandidates[candidate].Star
 
-        # find the nearest runway for an initial guess
-        distance = 100000.0
-        currentPosition = Waypoint(latitude = self.Report.position.latitude, longitude = self.Report.position.longitude)
-        for runway in sequencingConfig.ActiveArrivalRunways:
-            candidateDistance = runway.Runway.Start.haversine(currentPosition)
-            if distance > candidateDistance:
-                self.PlannedRunway = runway
-                distance = candidateDistance
-
-    def findArrivalRoute(self, navData : SctEseFormat):
-        self.PlannedStar = None
-        if None == self.PlannedRunway:
-            return
-
-        for arrivalRunway in navData.ArrivalRoutes:
-            if arrivalRunway == self.PlannedRunway.Runway.Name:
-                stars = navData.ArrivalRoutes[arrivalRunway]
-                for star in stars:
-                    if 0 != len(star.Route) and self.Report.initialApproachFix == star.Iaf.Name:
-                        self.PlannedStar = star
-                        return
-
-    def secondsUntilTouchdown(self, weather : WeatherModel):
-        if None == self.PlannedRunway or None == self.PlannedStar:
-            return timedelta(seconds = 0)
+        self.EstimatedArrivalTime = self.InitialArrivalTime
+        if None != self.PlannedStar:
+            for runway in navData.Runways[self.Report.destination]:
+                if runway.Name == self.PlannedStar.Runway:
+                    self.PlannedRunway = runway
+                    break
 
+    def arrivalEstimation(self, runway : Runway, star : ArrivalRoute, weather : WeatherModel):
         # calculate remaining trackmiles
         trackmiles = self.Report.distanceToIAF
-        start = self.PlannedStar.Route[0]
+        start = star.Route[0]
         turnIndices = [ -1, -1 ]
         constraints = []
-        for i in range(0, len(self.PlannedStar.Route)):
+        for i in range(0, len(star.Route)):
             # identified the base turn
-            if True == self.PlannedStar.Route[i].BaseTurn:
+            if True == star.Route[i].BaseTurn:
                 turnIndices[0] = i
             # identified the final turn
-            elif -1 != turnIndices[0] and True == self.PlannedStar.Route[i].FinalTurn:
+            elif -1 != turnIndices[0] and True == star.Route[i].FinalTurn:
                 turnIndices[1] = i
             # skip waypoints until the final turn point is found
             elif -1 != turnIndices[0] and -1 == turnIndices[1]:
                 continue
 
-            trackmiles += start.haversine(self.PlannedStar.Route[i]) * 0.539957
+            trackmiles += start.haversine(star.Route[i]) * 0.539957
 
             # check if a new constraint is defined
             altitude = -1
             speed = -1
-            if None != self.PlannedStar.Route[i].Altitude:
-                altitude = self.PlannedStar.Route[i].Altitude
-            if None != self.PlannedStar.Route[i].Speed:
-                speed = self.PlannedStar.Route[i].Speed
+            if None != star.Route[i].Altitude:
+                altitude = star.Route[i].Altitude
+            if None != star.Route[i].Speed:
+                speed = star.Route[i].Speed
             if -1 != altitude or -1 != speed:
                 constraints.append([ trackmiles, altitude, speed ])
 
-            start = self.PlannedStar.Route[i]
+            start = star.Route[i]
 
         # add the remaining distance from the last waypoint to the runway threshold
-        trackmiles += start.haversine(self.PlannedRunway.Runway.Start)
+        trackmiles += start.haversine(runway.Start)
 
         if turnIndices[0] > turnIndices[1] or (-1 == turnIndices[1] and -1 != turnIndices[0]):
-            sys.stderr.write('Invalid constraint definition found for ' + self.PlannedStar.Name)
+            sys.stderr.write('Invalid constraint definition found for ' + star.Name)
             sys.exit(-1)
 
         # calculate descend profile
-        currentHeading = Waypoint(latitude = self.Report.position.latitude, longitude = self.Report.position.longitude).bearing(self.PlannedStar.Route[0])
+        currentHeading = Waypoint(latitude = self.Report.position.latitude, longitude = self.Report.position.longitude).bearing(star.Route[0])
         currentIAS = self.PerformanceData.ias(self.Report.dynamics.altitude, trackmiles)
         currentPosition = [ self.Report.dynamics.altitude, self.Report.dynamics.groundSpeed ]
         distanceToWaypoint = self.Report.distanceToIAF
@@ -170,9 +176,9 @@ class Inbound:
                     nextWaypointIndex = turnIndices[1]
 
                 # update the statistics
-                if nextWaypointIndex < len(self.PlannedStar.Route):
-                    distanceToWaypoint = self.PlannedStar.Route[lastWaypointIndex].haversine(self.PlannedStar.Route[nextWaypointIndex]) * 0.539957
-                    currentHeading = self.PlannedStar.Route[lastWaypointIndex].bearing(self.PlannedStar.Route[nextWaypointIndex])
+                if nextWaypointIndex < len(star.Route):
+                    distanceToWaypoint = star.Route[lastWaypointIndex].haversine(star.Route[nextWaypointIndex]) * 0.539957
+                    currentHeading = star.Route[lastWaypointIndex].bearing(star.Route[nextWaypointIndex])
                     currentPosition[1] = min(weather.calculateGS(newAltitude, currentIAS, currentHeading), currentPosition[1])
 
         return timedelta(seconds = flightTimeSeconds), timedelta(seconds = flightTimeUntilIafSeconds), trackmiles