A 1.0 #regions in PPM
# low field   high field  bias        slope
  130.7939648949278  130.23069329360493  -2880000.0  -106954.90271608805  # for region 1
  42.91253353612958  42.171409523145286  -2880000.0  -22744.376400298723  # for region 2
  -22.794606165817072  -23.794700641635206  -2880000.0  -22744.376400298723  # for region 3
