A 1.0 #regions in PPM
# low field   high field  bias        slope
  9.145205100421432  8.890700320261281  40000.0  -0.0  # for region 1
  8.788898408197221  8.60226156941311  40000.0  -0.0  # for region 2
  8.44955870131702  8.195053921156868  40000.0  -0.0  # for region 3
  7.753912302212606  7.3297376686123545  40000.0  -0.0  # for region 4
