A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.52587547432277  7.451891160527009  131593.75  1.9286831626848686  # for region 1
  2.963956709581596  1.7579743236992058  142906.25  -0.36410840932117555  # for region 2
