P    #regions in PPM
# 2024-08-15 17:11:28 -0400  suvee@LAPTOP-P57SIM1R
# low field   high field   mi   maxi
  162.49902818871337  143.67424063556015  2.255  8.495  # for region 1
  136.10105024061346  107.53930360824306  3.905  19.405  # for region 2
  92.82567655520377  69.67335163350958  1.852  19.969  # for region 3
  66.42769860710386  0.6491306052811452  2.858  19.446  # for region 4
