text: #!/usr/bin/env python3
  
  ################################################################################
  
  a   = 6378137.0
  b   = 6356752.3142
  f   = ( a - b ) / a
  
  r1  = ( 2.0 * a + b ) / 3.0
  a2  = a**2
  b2  = b**2
  e2  = 1.0 - b2 / a2
  e   = e2**0.5
  ep2 = a2 / b2 - 1.0
  ep  = ep2**0.5
  
  print( "f   = ", f)
  print( "r1  = ", r1)
  print( "a2  = ", a2)
  print( "b2  = ", b2)
  print( "e2  = ", e2)
  print( "e   = ", e)
  print( "ep2 = ", ep2)
  print( "ep  = ", ep)
  