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AIRCRAFT_LENGTH['Boeing 757-200 (twin-jet)'] = 47.3
AIRCRAFT_LENGTH['Boeing 757-300 (twin-jet)'] = 54.4
AIRCRAFT_LENGTH['Boeing 767-200 (twin-jet)'] = 48.51
AIRCRAFT_LENGTH['Boeing 767-300 (twin-jet)'] = 54.94
AIRCRAFT_LENGTH['Boeing 777 (twin-jet)'] = (63.73 + 73.86) / 2
AIRCRAFT_LENGTH['Boeing 777-200 (twin-jet)'] = 63.73
AIRCRAFT_LENGTH['Boeing 777-200LR/F (twin-jet)'] = 63.73
AIRCRAFT_LENGTH['Boeing 777-300ER (twin-jet)'] = 73.86
AIRCRAFT_LENGTH['Boeing 787-10 (twin-jet)'] = 68.28
AIRCRAFT_LENGTH['Boeing 787-8 (twin-jet)'] = 56.72
AIRCRAFT_LENGTH['Boeing 787-9 (twin-jet)'] = 62.81
AIRCRAFT_LENGTH['Bombardier Challenger 300 (twin-jet)'] = 20.92
AIRCRAFT_LENGTH['Bombardier Global 5000 (twin-jet)'] = 29.5
AIRCRAFT_LENGTH['Bombardier Global Express (twin-jet)'] = (29.5 + 30.3) / 2
AIRCRAFT_LENGTH['Canadair Regional Jet CRJ-200 (twin-jet)'] = 26.77
AIRCRAFT_LENGTH['Canadair Regional Jet CRJ-700 (twin-jet)'] = 32.3
AIRCRAFT_LENGTH['Canadair Regional Jet CRJ-900 (twin-jet)'] = 36.2
AIRCRAFT_LENGTH['Canadair Challenger (twin-jet)'] = 20.9
AIRCRAFT_LENGTH['Canadair Challenger 350 (twin-jet)'] = 20.9
AIRCRAFT_LENGTH['Cessna Caravan (single-turboprop)'] = 11.46

AIRCRAFT_LENGTH['Cessna Citation CJ2+ (twin-jet)'] = 14.53
AIRCRAFT_LENGTH['Cessna Citation CJ3 (twin-jet)'] = 15.59
AIRCRAFT_LENGTH['Cessna Citation Excel/XLS (twin-jet)'] = 16.0
AIRCRAFT_LENGTH['Cessna Citation II (twin-jet)'] = 14.54
AIRCRAFT_LENGTH['Cessna Citation Latitude (twin-jet)'] = 18.97
AIRCRAFT_LENGTH['Cessna Citation Sovereign (twin-jet)'] = 19.35
AIRCRAFT_LENGTH['Cessna Citation V (twin-jet)'] = 14.91
AIRCRAFT_LENGTH['Cessna Citation X (twin-jet)'] = 22.04
AIRCRAFT_LENGTH['Cessna Citation Mustang (twin-jet)'] = 12.37
AIRCRAFT_LENGTH['Cessna Skyhawk (piston-single)'] = 8.28
AIRCRAFT_LENGTH['Cessna Skylane (piston-single)'] = 8.84
AIRCRAFT_LENGTH['Cessna T206 Turbo Stationair (piston-single)'] = 8.61
AIRCRAFT_LENGTH['Cirrus SR-22 (piston-single)'] = 7.92
AIRCRAFT_LENGTH['Dassault Falcon 900 (tri-jet)'] = 20.21

AIRCRAFT_LENGTH['Embraer 170/175 (twin-jet)'] = (29.90 + 31.68) / 2
AIRCRAFT_LENGTH['Embraer Phenom 300 (twin-jet)'] = 15.9
AIRCRAFT_LENGTH['Embraer ERJ-135 (twin-jet)'] = 26.33
AIRCRAFT_LENGTH['Embraer ERJ-145 (twin-jet)'] = 29.87

AIRCRAFT_LENGTH['EMBRAER 175 (long wing) (twin-jet)'] = 31.68

AIRCRAFT_LENGTH['IAI Gulfstream G280 (twin-jet)'] = 20.3
AIRCRAFT_LENGTH['Gulfstream Aerospace Gulfstream G550 (twin-jet)'] = 29.39
AIRCRAFT_LENGTH['Gulfstream Aerospace Gulfstream IV (twin-jet)'] = 26.92
AIRCRAFT_LENGTH['Learjet 45 (twin-jet)'] = 17.68
AIRCRAFT_LENGTH['McDonnell Douglas MD-11 (tri-jet)'] = 61.6
AIRCRAFT_LENGTH['Pilatus PC-12 (single-turboprop)'] = 14.4


def Log(message, file=None, rolling=None):
  """Write a message to a logfile along with a timestamp.

  Args:
    message: string message to write
    file: string representing file name and, if needed, path to the
      file to write to
    rolling: name of file that will keep only the last n files of file
  """
  # can't define as a default parameter because LOGFILE name is potentially
  # modified based on SIMULATION flag
  if not file:
    file = LOGFILE

  # special case: for the main logfile, we always keep a rolling log
  if not rolling and file == LOGFILE:
    rolling = ROLLING_LOGFILE

  try:




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AIRCRAFT_LENGTH['Boeing 757-200 (twin-jet)'] = 47.3
AIRCRAFT_LENGTH['Boeing 757-300 (twin-jet)'] = 54.4
AIRCRAFT_LENGTH['Boeing 767-200 (twin-jet)'] = 48.51
AIRCRAFT_LENGTH['Boeing 767-300 (twin-jet)'] = 54.94
AIRCRAFT_LENGTH['Boeing 777 (twin-jet)'] = (63.73 + 73.86) / 2
AIRCRAFT_LENGTH['Boeing 777-200 (twin-jet)'] = 63.73
AIRCRAFT_LENGTH['Boeing 777-200LR/F (twin-jet)'] = 63.73
AIRCRAFT_LENGTH['Boeing 777-300ER (twin-jet)'] = 73.86
AIRCRAFT_LENGTH['Boeing 787-10 (twin-jet)'] = 68.28
AIRCRAFT_LENGTH['Boeing 787-8 (twin-jet)'] = 56.72
AIRCRAFT_LENGTH['Boeing 787-9 (twin-jet)'] = 62.81
AIRCRAFT_LENGTH['Bombardier Challenger 300 (twin-jet)'] = 20.92
AIRCRAFT_LENGTH['Bombardier Global 5000 (twin-jet)'] = 29.5
AIRCRAFT_LENGTH['Bombardier Global Express (twin-jet)'] = (29.5 + 30.3) / 2
AIRCRAFT_LENGTH['Canadair Regional Jet CRJ-200 (twin-jet)'] = 26.77
AIRCRAFT_LENGTH['Canadair Regional Jet CRJ-700 (twin-jet)'] = 32.3
AIRCRAFT_LENGTH['Canadair Regional Jet CRJ-900 (twin-jet)'] = 36.2
AIRCRAFT_LENGTH['Canadair Challenger (twin-jet)'] = 20.9
AIRCRAFT_LENGTH['Canadair Challenger 350 (twin-jet)'] = 20.9
AIRCRAFT_LENGTH['Cessna Caravan (single-turboprop)'] = 11.46
AIRCRAFT_LENGTH['Cessna Citation CJ1 (twin-jet)'] = 12.98
AIRCRAFT_LENGTH['Cessna Citation CJ2+ (twin-jet)'] = 14.53
AIRCRAFT_LENGTH['Cessna Citation CJ3 (twin-jet)'] = 15.59
AIRCRAFT_LENGTH['Cessna Citation Excel/XLS (twin-jet)'] = 16.0
AIRCRAFT_LENGTH['Cessna Citation II (twin-jet)'] = 14.54
AIRCRAFT_LENGTH['Cessna Citation Latitude (twin-jet)'] = 18.97
AIRCRAFT_LENGTH['Cessna Citation Sovereign (twin-jet)'] = 19.35
AIRCRAFT_LENGTH['Cessna Citation V (twin-jet)'] = 14.91
AIRCRAFT_LENGTH['Cessna Citation X (twin-jet)'] = 22.04
AIRCRAFT_LENGTH['Cessna Citation Mustang (twin-jet)'] = 12.37
AIRCRAFT_LENGTH['Cessna Skyhawk (piston-single)'] = 8.28
AIRCRAFT_LENGTH['Cessna Skylane (piston-single)'] = 8.84
AIRCRAFT_LENGTH['Cessna T206 Turbo Stationair (piston-single)'] = 8.61
AIRCRAFT_LENGTH['Cirrus SR-22 (piston-single)'] = 7.92
AIRCRAFT_LENGTH['Dassault Falcon 900 (tri-jet)'] = 20.21
AIRCRAFT_LENGTH['Dassault Falcon 2000 (twin-jet)'] = 20.23
AIRCRAFT_LENGTH['Embraer 170/175 (twin-jet)'] = (29.90 + 31.68) / 2
AIRCRAFT_LENGTH['Embraer Phenom 300 (twin-jet)'] = 15.9
AIRCRAFT_LENGTH['Embraer ERJ-135 (twin-jet)'] = 26.33
AIRCRAFT_LENGTH['Embraer ERJ-145 (twin-jet)'] = 29.87
AIRCRAFT_LENGTH['Embraer Legacy 450 (twin-jet)'] = 19.69
AIRCRAFT_LENGTH['EMBRAER 175 (long wing) (twin-jet)'] = 31.68
AIRCRAFT_LENGTH['Eurocopter EC-635 (twin-turboshaft)'] = 10.21
AIRCRAFT_LENGTH['IAI Gulfstream G280 (twin-jet)'] = 20.3
AIRCRAFT_LENGTH['Gulfstream Aerospace Gulfstream G550 (twin-jet)'] = 29.39
AIRCRAFT_LENGTH['Gulfstream Aerospace Gulfstream IV (twin-jet)'] = 26.92
AIRCRAFT_LENGTH['Learjet 45 (twin-jet)'] = 17.68
AIRCRAFT_LENGTH['McDonnell Douglas MD-11 (tri-jet)'] = 61.6
AIRCRAFT_LENGTH['Pilatus PC-12 (single-turboprop)'] = 14.4


def Log(message, file=None, rolling=None):
  """Write a message to a logfile along with a timestamp.

  Args:
    message: string message to write
    file: string representing file name and, if needed, path to the
      file to write to
    rolling: name of file that will keep only the last n files of file
  """
  # can't define as a default parameter because LOGFILE name is potentially
  # modified based on SIMULATION flag
  if not file:
    file = LOGFILE

  # special case: for the main logfile, we always keep a rolling log
  if not rolling and file == LOGFILE:
    rolling = ROLLING_LOGFILE

  try:




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