A 1.0 #regions in PPM
# low field   high field  bias        slope
  3.688794576836913  3.6278787030909823  -0.0  -0.0  # for region 1
  3.2556150301991837  3.079635839377606  -0.0  -0.0  # for region 2
  2.5855404189939466  2.4163296585885834  -0.0  -0.0  # for region 3