A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.052824938508415  7.914707881397533  -0.0  -0.0  # for region 1
  2.5221375646335082  2.4140459547206436  -0.0  -0.0  # for region 2
  2.2519085398513465  2.125801661619671  -0.0  -0.0  # for region 3