A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.252242510234483  7.077695332666771  -0.0  -0.0  # for region 1
  3.613653599576692  3.5751100587888693  -0.0  -0.0  # for region 2
  3.1394815215704175  3.0214281623574286  -0.0  -0.0  # for region 3
  2.6082414051119684  2.5233905531776326  -0.0  -0.0  # for region 4