P    #regions in PPM
# 2012-08-21 10:37:03 -0500  mfjofre@kerry.nmrfam.wisc.edu
# low field   high field   mi   maxi
  1000.0  0.1  0.000  1000000.000  # for region 1
  0.0077766676129129  -0.00606122622771152  50.000  10000.000  # for region 2