15  iter    data misfit       model norm              beta
       0       2.57080E+05       0.00000E+00       0.00000E+00
       1       1.28540E+05       3.63297E+00       1.58499E+04
       2       6.42774E+04       1.37169E+01       4.25263E+03
       3       3.17674E+04       2.91306E+01       1.51222E+03
       4       1.56569E+04       4.84312E+01       6.00000E+02
       5       7.79602E+03       6.97577E+01       2.60199E+02
       6       3.89800E+03       8.95751E+01       1.37400E+02
       7       1.94758E+03       1.06566E+02       8.02499E+01
       8       9.73755E+02       1.22904E+02       4.16303E+01
       9       4.81217E+02       1.41185E+02       1.72632E+01
      10       2.34998E+02       1.66836E+02       5.72809E+00
      11       1.13855E+02       2.07214E+02       1.69894E+00
      12       5.61534E+01       2.39426E+02       7.90778E-01
      13       4.40177E+01       2.37754E+02       9.52357E-01
      14       4.49504E+01       2.30537E+02       1.21709E+00
      15       4.49850E+01       2.28950E+02       1.42896E+00
 4.50000E+01 target misfit
          45 number of data