A 1.0 #regions in PPM
# low field   high field  bias        slope
  3.6802616320005965  3.5856592953786377  -0.0  -0.0  # for region 1
  3.4656758440532265  3.195713078571051  -0.0  -0.0  # for region 2
  2.570414707240542  2.369673163676873  -0.0  -0.0  # for region 3