P    #regions in PPM
# 2018-01-12 15:37:39 -0600  bmrbmb@tonga.nmrfam.wisc.edu
# low field   high field   mi   maxi
  1000.0  8.455253781503513  0.000  1000000.000  # for region 1
  8.455253781503513  0.7982802221458037  0.295  16.000  # for region 2
  0.7982802221458037  0.1  0.000  1000000.000  # for region 3
