A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.350639552040247  7.311934795976321  224437.5  3.8246543100912  # for region 1
  7.597661617643021  7.38884639347947  245250.0  -2.554744525547444  # for region 2
  1.9420985183417818  1.5332356723750908  238000.0  1.3069454817027633  # for region 3
  0.5083176065753552  -0.16266163410411366  218250.0  -4.439890710382515  # for region 4
