A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.238033607600407  7.161204928892639  124500.0  2.1187943262411393  # for region 1
  7.486197042335816  7.251982302888462  136875.0  -5.249023437500003  # for region 2
  6.6610386027169  6.337401568132599  135781.25  -0.08844339622641495  # for region 3
