A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.691497  8.388376  0.0  0.0  # for region 1
  7.447845  7.101029  0.0  0.0  # for region 2
  6.966885  6.616096  0.0  0.0  # for region 3
  4.487221  4.160571  0.0  0.0  # for region 4
  3.702834  2.943809  0.0  0.0  # for region 5
  2.875057  2.356818  0.0  0.0  # for region 6
