text: """
  ====================================
  Create a PPI plot from a Sigmet file
  ====================================
  
  An example which creates a PPI plot of a Sigmet file.
  
  """
  print __doc__
  
  # Author: Jonathan J. Helmus (jhelmus@anl.gov)
  # License: BSD 3 clause
  
  import matplotlib.pyplot as plt
  import pyart
  
  filename = 'XSW110520105408.RAW7HHF'
  
  # create the plot using RadarDisplay (recommended method)
  radar = pyart.io.read_rsl(filename)
  display = pyart.graph.RadarDisplay(radar)
  fig = plt.figure()
  ax = fig.add_subplot(111)
  display.plot('reflectivity', 0, vmin=-32, vmax=64.)
  display.plot_range_rings([10, 20, 30, 40])
  display.plot_cross_hair(5.)
  plt.show()
  