def calc(pos, bearing):
segments = [pos]
lastPos = pos
for index in range(0, len(satelliteInfos)-1):
pingInterval = satelliteInfos[index]['NextPingTimeOffset']
newPos = Geo.greatCircleDestination(lastPos, bearing, Geo.nmToKm((pingInterval/60.0)*aircraftGroundSpeed))
satelliteRange = Geo.greatCircleDistance(newPos, satelliteInfos[index+1]['LatLon'])
if math.fabs(satelliteRange - satelliteInfos[index+1]['PingRadius']) < pingRingDiffError * satelliteInfos[index+1]['PingRadius']:
if filterUsingDoppler:
aircraftECEF = Geo.sphericalToECEF(newPos)
aircraftECEFVel = Geo.ecefVelocities(newPos, Geo.knotsToKms(aircraftGroundSpeed), bearing)
LOSSpeed = Geo.LOSSpeed(satelliteInfos[index+1]['XYZ'], satelliteInfos[index+1]['Velocity'], aircraftECEF, aircraftECEFVel) * -1.0
if math.fabs(LOSSpeed - satelliteInfos[index+1]['LOSSpeed']) < math.fabs(dopplerDiffError * satelliteInfos[index+1]['LOSSpeed']):
segments.append(newPos)
lastPos = newPos
else:
break
else:
segments.append(newPos)
lastPos = newPos
else:
break
if len(segments) == 5:
for index in range(1, len(satelliteInfos)):
segmentPos = segments[index]
ax.scatter(segmentPos[1], segmentPos[0], c=satelliteInfos[index]['Color'])
prevSegmentPos = segments[index-1]
ax.plot([prevSegmentPos[1], segmentPos[1]], [prevSegmentPos[0], segmentPos[0]])
def check(groundspeed, bearing, positions):
print("Aircraft groundspeed: %f Bearing: %f" % (groundspeed, bearing))
for index, aircraftPos in enumerate(positions):
aircraftECEF = Geo.sphericalToECEF(aircraftPos)
aircraftECEFVel = Geo.ecefVelocities(aircraftPos, Geo.knotsToKms(groundspeed), bearing)
LOSSpeed = Geo.LOSSpeed(satelliteInfos[index]['XYZ'], satelliteInfos[index]['Velocity'], aircraftECEF, aircraftECEFVel)
pingRadius = Geo.greatCircleDistance(aircraftPos, satelliteInfos[index]['LatLon'])
print(aircraftPos, Geo.KmsToKmh(LOSSpeed), Geo.KmsToKnots(LOSSpeed), Geo.kmToNm(pingRadius))
def groundCheckGeoSat(groundspeed, bearing, aircraftPos):
aircraftECEF = Geo.sphericalToECEF(aircraftPos)
aircraftECEFVel = Geo.ecefVelocities(aircraftPos, groundspeed, bearing)
LOSSpeed = Geo.LOSSpeed(satelliteGeo['XYZ'], satelliteGeo['Velocity'], aircraftECEF, aircraftECEFVel)
print(Geo.KmsToKnots(LOSSpeed), Geo.KmsToKnots(LOSSpeed) * 2.82)
track4 = [(11.743,95.841), (16.006,96.291), (20.271,96.740), (24.536,97.190), (31.008,97.873)]
check(257.4, 6.02, track4)
# GlobusMax digitized southern track
print('GlobusMax 454 Southern Check')
track5 = [(-3.28,93.25), (-10.67,91.68), (-18.18,90.72), (-25.71,90.10), (-37.13,88.91)]
lastBearing = 0.0
for index, pos in enumerate(track5):
if index < len(track5)-1:
bearing = Geo.bearing(pos, track5[index+1])
lastBearing = bearing
else:
bearing = lastBearing
aircraftECEF = Geo.sphericalToECEF(pos)
aircraftECEFVel = Geo.ecefVelocities(pos, Geo.knotsToKms(454), bearing)
LOSSpeed = Geo.LOSSpeed(satelliteInfos[index]['XYZ'], satelliteInfos[index]['Velocity'], aircraftECEF, aircraftECEFVel) * -1.0
print(pos, bearing, Geo.kmToNm(Geo.greatCircleDistance(pos,satelliteInfos[index]['LatLon'])), Geo.KmsToKnots(LOSSpeed))
print('GlobusMax 394 Southern Check')
track6 = [(0.63,93.47), (-5.92,93.69), (-12.47,94.01), (-18.73,96.02), (-28.28,99.06)]
lastBearing = 0.0
for index, pos in enumerate(track6):
if index < len(track6)-1:
bearing = Geo.bearing(pos, track6[index+1])
lastBearing = bearing
else:
bearing = lastBearing
aircraftECEF = Geo.sphericalToECEF(pos)
# Iterate over the starting points
for pos in startingPoints:
for bearing in matplotlib.mlab.frange(0, 359, bearingIncrement):
#for bearing in range(90, 270, 1):
segments = [pos]
lastPos = pos
sog = float(aircraftGroundSpeed)
for index in range(0, len(satelliteInfos)-1):
pingInterval = satelliteInfos[index]['NextPingTimeOffset']
newPos = Geo.greatCircleDestination(lastPos, bearing, Geo.nmToKm((pingInterval/60.0)*sog))
satelliteRange = Geo.greatCircleDistance(newPos, satelliteInfos[index+1]['LatLon'])
if math.fabs(satelliteRange - satelliteInfos[index+1]['PingRadius']) < pingRingDiffError * satelliteInfos[index+1]['PingRadius']:
if filterUsingDoppler:
aircraftECEF = Geo.sphericalToECEF(newPos)
aircraftECEFVel = Geo.ecefVelocities(newPos, Geo.knotsToKms(sog), bearing)
LOSSpeed = Geo.LOSSpeed(satelliteInfos[index+1]['XYZ'], satelliteInfos[index+1]['Velocity'], aircraftECEF, aircraftECEFVel) * -1.0
if math.fabs(LOSSpeed - satelliteInfos[index+1]['LOSSpeed']) < math.fabs(dopplerDiffError * satelliteInfos[index+1]['LOSSpeed']):
segments.append(newPos)
lastPos = newPos
else:
break
else:
segments.append(newPos)
lastPos = newPos
else:
break
sog *= speed_accelerator
if len(segments) == 5:
for index in range(1, len(satelliteInfos)):
segmentPos = segments[index]