P    #regions in PPM
# 2021-12-10 15:05:14 +0000  benduff1@400WB
# low field   high field   mi   maxi
  436.126584680675  371.58997837707096  50.000  10000.000  # for region 1
  371.589968377071  -448.614219525259  50.000  10000.000  # for region 2
