/home/critechuser/cycloneSurge/Python/vtcalc.py:19: FutureWarning: comparison to `None` will result in an elementwise object comparison in the future.
  if lon == None :

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[   0.    9.   21.   33.   45.   57.   69.   93.  117.]
[-45.  -46.5 -48.3 -49.8 -51.3 -52.6 -54.2 -56.9 -60. ]

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