A 1.0 #regions in PPM
# low field   high field  bias        slope
  4.735280932518014  3.9417498346989865  -148102.0  -5.346320346320346  # for region 1
  4.7250781926190335  3.9392161312330587  1826.0  -8.616729816380063  # for region 2
