A 1.0 #regions in PPM
# low field   high field  bias        slope
  5.586936790325656  5.501640045435188  -56000.0  136.75213675213675  # for region 1
  5.331046555654252  5.20310143831855  -56000.0  91.42857142857143  # for region 2
  2.388308856933105  2.1835966691959814  -56000.0  57.245080500894446  # for region 3
  1.1515060560213184  0.8870861468608675  -56000.0  44.3213296398892  # for region 4
