P    #regions in PPM
# 2019-05-01 15:12:37 -0500  bmrbmb@tonga.nmrfam.wisc.edu
# low field   high field   mi   maxi
  1000.0  5.428202347939182  0.000  1000000.000  # for region 1
  5.428202347939182  0.2147849849903993  0.050  16.000  # for region 2
  0.2147849849903993  0.1  0.000  1000000.000  # for region 3
