P    #regions in PPM
# 2023-09-17 16:57:48 -0400  chris@Chriss-MBP-2.fios-router.home
# low field   high field   mi   maxi
  6.973601450442541  6.6280626398350275  0.035  0.068  # for region 1
  6.47099954410434  6.235404900508308  0.012  0.037  # for region 2
  5.650344868911487  5.277320016551104  0.008  0.035  # for region 3
  4.868955967651312  4.723672604100426  13.387  15.718  # for region 4
  4.36439077261648  4.115053108144014  0.010  0.036  # for region 5
  4.081677200301243  3.9913659202560976  0.009  0.020  # for region 6
  3.893201485424418  3.850009134098479  0.015  0.030  # for region 7
  3.188380843332958  3.0234645928157358  0.008  0.018  # for region 8
  2.960639354523461  2.795723104006239  0.078  0.098  # for region 9
  1.9868481609931978  1.6962814338914258  0.033  0.070  # for region 10
