A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.403553300458492  8.292660424295537  34562.5  -2.7829855954855955  # for region 1
  7.915928461440565  7.859722483111396  37500.0  -3.0405405405405403  # for region 2
