P    #regions in PPM
# 2011-06-16 11:24:32 -0500  mfjofre@kerry
# low field   high field   mi   maxi
  7.241834738752948  7.1762648065107175  0.753  4.267  # for region 1
  6.924393003294533  6.872353374530858  0.904  3.414  # for region 2
  3.2602827420442098  2.874376369993586  0.823  3.545  # for region 3