A 1.0 #regions in PPM
# low field   high field  bias        slope
  4.956160722632589  4.7393712990016175  -210652.0  4.535374868004224  # for region 1
  4.954797267138055  3.8708501489831972  -211989.0  -2.5230346576500424  # for region 2
  4.946308268723489  3.869875361110767  -17834.0  -6.032560119174293  # for region 3
  4.943006327289094  4.734984016922218  -16266.0  5.988998899889989  # for region 4
