A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.924390562714977  7.743409375312025  -0.0  -0.0  # for region 1
  7.187538585431529  6.954848487342018  -0.0  -0.0  # for region 2
  3.92987721217839  3.8006049354619953  -0.0  -0.0  # for region 3
  3.529133154357567  3.3998608776411725  -0.0  -0.0  # for region 4