A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.201627019614872  7.08267378598049  -0.0  -0.0  # for region 1
  6.775377932425004  6.62173000564726  -0.0  -0.0  # for region 2
  3.7519832442177963  3.66276831899201  -0.0  -0.0  # for region 3
  2.87470314616423  2.755749912529848  -0.0  -0.0  # for region 4