A 1.0 #regions in PPM
# low field   high field  bias        slope
  5.98924089032374  5.644421884237785  -0.0  -0.0  # for region 1
  5.267773431436203  4.944174056493999  -0.0  -0.0  # for region 2
  3.830143421447068  3.5489833087923666  -0.0  -0.0  # for region 3