202 lines
9.8 KiB
Python
202 lines
9.8 KiB
Python
#!/usr/bin/env python
|
|
|
|
import json
|
|
import pytz
|
|
import sys
|
|
|
|
from datetime import datetime, timedelta
|
|
|
|
from aman.com import AircraftReport_pb2
|
|
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.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.EarliestArrivalTime = None
|
|
self.PlannedArrivalTime = None
|
|
self.EstimatedStarEntryTime = None
|
|
self.PlannedRunway = None
|
|
self.PlannedStar = None
|
|
self.ArrivalCandidates = {}
|
|
self.WTC = None
|
|
|
|
# analyze the WTC
|
|
wtc = report.aircraft.wtc.upper()
|
|
if 'L' == wtc or 'M' == wtc or 'H' == wtc or 'J' == wtc:
|
|
self.WTC = wtc
|
|
|
|
# search performance data -> fallback to A320
|
|
if self.Report.aircraft.type in performanceData.Aircrafts:
|
|
self.PerformanceData = performanceData.Aircrafts[self.Report.aircraft.type]
|
|
if None == self.PerformanceData:
|
|
self.PerformanceData = performanceData.Aircrafts['A320']
|
|
|
|
# calculate the timings for the different arrival runways
|
|
for identifier in sequencingConfig.ActiveArrivalRunways:
|
|
star = self.findArrivalRoute(identifier.Runway, navData)
|
|
|
|
if None != star:
|
|
flightTime, flightTimeUntilIaf, trackmiles = self.arrivalEstimation(identifier.Runway, star, weatherModel)
|
|
|
|
avgSpeed = trackmiles / (float(flightTime.seconds) / 3600.0)
|
|
ttg = flightTime - timedelta(minutes = (trackmiles / (avgSpeed * 1.1)) * 60)
|
|
ttl = timedelta(minutes = (trackmiles / (avgSpeed * 0.9)) * 60) - flightTime
|
|
ita = self.ReportTime + flightTime
|
|
earliest = ita - ttg
|
|
latest = ita + ttl
|
|
|
|
self.ArrivalCandidates[identifier.Runway.Name] = ArrivalTime(ttg = ttg, star = star, ita = ita, earliest = earliest,
|
|
entry = flightTimeUntilIaf, touchdown = flightTime,
|
|
ttl = ttl, latest = latest)
|
|
|
|
# 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
|
|
|
|
if None != self.PlannedStar:
|
|
for runway in navData.Runways[self.Report.destination.upper()]:
|
|
if runway.Name == self.PlannedStar.Runway:
|
|
self.PlannedRunway = runway
|
|
break
|
|
|
|
def toJSON(self):
|
|
pta = str(self.PlannedArrivalTime)
|
|
delimiter = pta.find('.')
|
|
if -1 == delimiter:
|
|
delimiter = pta.find('+')
|
|
return json.dumps({ 'callsign' : self.Callsign, 'runway' : self.PlannedRunway.Name, 'pta' : pta[0:delimiter] }, ensure_ascii=True)
|
|
|
|
def arrivalEstimation(self, runway : Runway, star : ArrivalRoute, weather : WeatherModel):
|
|
# calculate remaining trackmiles
|
|
trackmiles = self.Report.distanceToIAF
|
|
start = star.Route[0]
|
|
turnIndices = [ -1, -1 ]
|
|
constraints = []
|
|
for i in range(0, len(star.Route)):
|
|
# identified the base turn
|
|
if True == star.Route[i].BaseTurn:
|
|
turnIndices[0] = i
|
|
# identified the final turn
|
|
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(star.Route[i]) * 0.539957
|
|
|
|
# check if a new constraint is defined
|
|
altitude = -1
|
|
speed = -1
|
|
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 = star.Route[i]
|
|
|
|
# add the remaining distance from the last waypoint to the runway threshold
|
|
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 ' + star.Name)
|
|
sys.exit(-1)
|
|
|
|
# calculate descend profile
|
|
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
|
|
flightTimeUntilIafSeconds = 0
|
|
flightTimeSeconds = 0
|
|
nextWaypointIndex = 0
|
|
flownDistance = 0.0
|
|
|
|
while True:
|
|
# check if a constraint cleanup is needed and if a speed-update is needed
|
|
if 0 != len(constraints) and flownDistance >= constraints[0][0]:
|
|
if -1 != constraints[0][2]:
|
|
currentIAS = min(constraints[0][2], self.PerformanceData.ias(self.Report.dynamics.altitude, trackmiles - flownDistance))
|
|
currentPosition[1] = min(weather.calculateGS(currentPosition[0], currentIAS, currentHeading), currentPosition[1])
|
|
constraints.pop(0)
|
|
|
|
# search next altitude constraint
|
|
altitudeDistance = 0
|
|
nextAltitude = 0
|
|
for constraint in constraints:
|
|
if -1 != constraint[1]:
|
|
altitudeDistance = constraint[0]
|
|
nextAltitude = constraint[1]
|
|
break
|
|
|
|
# check if update of altitude and speed is needed on 3° glide
|
|
if currentPosition[0] > nextAltitude and ((currentPosition[0] - nextAltitude) / 1000 * 3) > (altitudeDistance - flownDistance):
|
|
oldGroundspeed = currentPosition[1]
|
|
descendRate = (currentPosition[1] / 60) / 3 * 1000 / 6
|
|
newAltitude = currentPosition[0] - descendRate
|
|
if 0 > newAltitude:
|
|
newAltitude = 0
|
|
|
|
currentPosition = [ newAltitude, min(weather.calculateGS(newAltitude, currentIAS, currentHeading), currentPosition[1]) ]
|
|
distance = (currentPosition[1] + oldGroundspeed) / 2 / 60 / 6
|
|
else:
|
|
distance = currentPosition[1] / 60 / 6
|
|
|
|
# update the statistics
|
|
distanceToWaypoint -= distance
|
|
flownDistance += distance
|
|
newIAS = min(currentIAS, self.PerformanceData.ias(currentPosition[0], trackmiles - flownDistance))
|
|
if newIAS < currentIAS:
|
|
currentPosition[1] = min(weather.calculateGS(currentPosition[0], newIAS, currentHeading), currentPosition[1])
|
|
currentIAS = newIAS
|
|
|
|
flightTimeSeconds += 10
|
|
if flownDistance <= self.Report.distanceToIAF:
|
|
flightTimeUntilIafSeconds += 10
|
|
if flownDistance >= trackmiles:
|
|
break
|
|
|
|
# check if we follow a new waypoint pair
|
|
if 0 >= distanceToWaypoint:
|
|
lastWaypointIndex = nextWaypointIndex
|
|
nextWaypointIndex += 1
|
|
|
|
# check if a skip from base to final turn waypoints is needed
|
|
if -1 != turnIndices[0] and nextWaypointIndex > turnIndices[0] and nextWaypointIndex < turnIndices[1]:
|
|
nextWaypointIndex = turnIndices[1]
|
|
|
|
# update the statistics
|
|
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(currentPosition[0], currentIAS, currentHeading), currentPosition[1])
|
|
|
|
return timedelta(seconds = flightTimeSeconds), timedelta(seconds = flightTimeUntilIafSeconds), trackmiles
|