A 1.0 #regions in PPM
# low field   high field  bias        slope
  3.555573483375367  3.5477297753629284  -0.0  -0.0  # for region 1
  1.2977381873636293  1.243123955029689  -0.0  -0.0  # for region 2
  1.2171171777278127  1.200212772481593  -0.0  -0.0  # for region 3
  -0.042911182548095936  -0.08322168736600423  -0.0  -0.0  # for region 4
