A 1.0 #regions in PPM
# low field   high field  bias        slope
  3.3104450844276725  3.1736830760795063  0.0  0.0  # for region 1
  3.101279659895183  2.972562475567497  0.0  0.0  # for region 2
  1.822152640638804  1.5687406839936724  0.0  0.0  # for region 3
