/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.]
[-41.5 -42.1 -42.7 -43.4 -44.6 -46.3 -48.2 -51.9 -55.5]

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