A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.26255958190107  7.109824364616084  -0.0  -0.0  # for region 1
  6.972362669059597  6.766170125724866  -0.0  -0.0  # for region 2
  2.9630632153287224  2.6652295416230003  -0.0  -0.0  # for region 3
  2.550678128659261  2.3292120635960316  -0.0  -0.0  # for region 4
