/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.   69.   93.  117.]
[-47.9 -49.4 -51.4 -53.5 -55.5 -59.3 -63.1 -66.7]

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