A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.264992464974332  8.097802643783119  0.0  0.0  # for region 1
  7.937881945252392  7.792499492042642  0.0  0.0  # for region 2
  7.567156689567528  7.385428623055339  0.0  0.0  # for region 3
