A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.290956406804644  7.135829674744971  -0.0  -0.0  # for region 1
  6.903139576655461  6.68337670623759  -0.0  -0.0  # for region 2
  3.8910955291634712  3.7101143417605194  -0.0  -0.0  # for region 3
  2.9732623644770713  2.818135632417398  -0.0  -0.0  # for region 4