*** Results log of t_1dvar_iono_bangle (1DVAR L1 and L2) ***
./../tools/ropp_1dvar_bangle   -direct_ion  -d  -y ../data/obs20090401_000329_M02_2030337800_N0007_YYYY1_reference.nc  --obs-corr ../errors/ropp_ob_bangle_error_corr_300L.nc  -b ../data/bgr20090401_000329_M02_2030337800_N0007_YYYY1_reference.nc  --bg-corr ../errors/ropp_bg_ecmwf_error_corr_L91.nc  -c ../config/ecmwf_bangle_1dvar_iono.cf  -o anl20090401_000329_M02_2030337800_N0007_YYYY_iono.nc

---------------------------------------------------------------------
                   ROPP Bending Angle 1D-Var
---------------------------------------------------------------------

INFO (from ropp_1dvar_bangle):  Reading configuration file ../config/ecmwf_bangle_1dvar_iono.cf.

INFO (from ropp_1dvar_bangle):  Reading observation data for profile 1 from the file
       ../data/obs20090401_000329_M02_2030337800_N0007_YYYY1_reference.nc.

... (from ropp_io_read_ncdf_get):  'start_time' and yr/mo/dy/hr/mn/sc/ms timestamps differ by 2.000 seconds (probably a leap-second issue) - using yr/../ms timestamp
 
WARNING (from ropp_fm_roprof2obs (1D bending angles)):  Azimuth (of -0.1E+09 deg) out of range or missing.
 
WARNING (from ropp_fm_roprof2obs (1D bending angles)):  Check input data and valid_range attributes.
 
WARNING (from ropp_fm_roprof2obs (1D bending angles)):  Continuing, as azimuth not needed directly for 1D bending angles.
 
WARNING (from ropp_fm_roprof2obs (1D bending angles)):  Azimuth (of -0.1E+09 deg) out of range or missing.
 
WARNING (from ropp_fm_roprof2obs (1D bending angles)):  Check input data and valid_range attributes.
 
WARNING (from ropp_fm_roprof2obs (1D bending angles)):  Continuing, as azimuth not needed directly for 1D bending angles.
 
WARNING (from ropp_fm_roprof2obs (1D bending angles)):  Missing LEO position or centre of curvature ... will try to estimate r_LEO from satellite ID.
INFO (from ropp_fm_roprof2obs (1D bending angles)):  Assuming LEO height of 830 km (Metop-A/B/C profile)
INFO (from ropp_1dvar_bangle):  Reading background data for profile 1 from the file
       ../data/bgr20090401_000329_M02_2030337800_N0007_YYYY1_reference.nc.

... (from ropp_io_read_ncdf_get):  'start_time' and yr/mo/dy/hr/mn/sc/ms timestamps differ by 2.000 seconds (probably a leap-second issue) - using yr/../ms timestamp
INFO (from ropp_fm_iono_set_default):  -direct_ion requested but sigma(Ne_max) not set ... defaulting to 200.0e9 m-3.
INFO (from ropp_fm_iono_set_default):  -direct_ion requested but sigma(H_peak) not set ... defaulting to 150.0 km.
INFO (from ropp_fm_iono_set_default):  -direct_ion requested but sigma(H_width) not set ... defaulting to  25.0 km.
INFO (from ropp_qc_bgqc):  Background quality control lets all bending angle values pass.

INFO (from ropp_qc_ion_bangle):  First derivative check removes     1 points from L1 bending angle profile.

INFO (from ropp_qc_ion_bangle):  First derivative check removes     1 points from L2 bending angle profile.

INFO (from ropp_qc_ion_bg):  L2-L1 data cause background Ne_max to be set to 323.68e9 m-3.

      n_iter =    0   J = 210.01            max(relative change in state) =  -
      n_iter =    1   J = 54.377            max(relative change in state) = 858.30
      n_iter =    2   J = 45.498            max(relative change in state) = 0.62841
      n_iter =    3   J = 44.760            max(relative change in state) = 0.18211
      n_iter =    4   J = 44.758            max(relative change in state) = 0.33700E-01
      n_iter =    5   J = 44.757            max(relative change in state) = 0.14134E-01
   
INFO (from ropp_1dvar_levmarq_bangle):  Convergence assumed to be achieved as the state vector did not change by more
    than 0.10000 relative to the assumed background errors for the last 2 iterations.

INFO (from ropp_1dvar_levmarq_bangle):  Finished after 5 iterations (5 forward model / gradient evaluations).

INFO (from ropp_1dvar_bangle):  Writing 1DVar retrieval for profile 1 to the file
       anl20090401_000329_M02_2030337800_N0007_YYYY_iono.nc.