P    #regions in PPM
# 2023-09-17 18:53:38 -0400  chris@Chriss-MBP-2.fios-router.home
# low field   high field   mi   maxi
  7.852448192350131  7.533940153346849  0.420  0.919  # for region 1
  4.912373986165995  4.6366143465568825  47.818  104.546  # for region 2
  4.6366143465568825  4.501864656168175  0.371  0.835  # for region 3
  4.501864656168175  4.4223616184686385  0.335  0.761  # for region 4
  3.2218313176101163  2.768569877490062  2.356  2.868  # for region 5
