A 1.0 #regions in PPM
# low field   high field  bias        slope  
  1.98147820839076  1.90997587435995  -0  -0  # for region 1
  1.9030089802749  1.76513781311805  -0  -0  # for region 2
  0.853208045248174  0.743204454431542  -0  -0  # for region 3