A 1.0 #regions in PPM
# low field   high field  bias        slope
  2.5360784362913265  2.399730133264911  -0.0  -0.0  # for region 1
  2.2633818302384956  2.106581281758118  -0.0  -0.0  # for region 2
  0.2999662666581139  0.16361796363169848  -0.0  -0.0  # for region 3