/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.]
[-39.  -41.2 -43.7 -45.9 -47.3 -48.7 -50.  -52.4 -55. ]

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