 In the CONFIG files several NAMELIST-options can be specified, they all are
 initialized by a default value in the src/oblimap_configuration_module.f90 
 in case no CONFIG file is used or in case a CONFIG variable is omitted in
 the CONFIG file. See for examples of CONFIG files in  the directory CONFIGs.
 Here the current possibilities / ranges are listed:
 
 NLON_config                       = any positive INTEGER
 NLAT_config                       = any positive INTEGER
 NX_config                         = any positive INTEGER
 NY_config                         = any positive INTEGER
 dx_config                         = any positive REAL
 dy_config                         = any positive REAL
 NX_ext_config                     = any positive INTEGER
 NY_ext_config                     = any positive INTEGER
 oblimap_allocate_factor_config    = any positive REAL
 choice_projection_method_config   = 'oblique_stereographic_projection'
                                     'oblique_stereographic_projection_snyder'
                                     'oblique_stereographic_projection_ellipsoid_snyder'
                                     'oblique_lambert_equal-area_projection_snyder'
                                     'oblique_lambert_equal-area_projection_ellipsoid_snyder'
 lambda_M_config                   = any REAL between   0 and 360 degrees
 phi_M_config                      = any REAL between -90 and  90 degrees
 alpha_stereographic_config        = any REAL between   0 and  90 degrees 
 shephard_exponent_quadrant_config = any positive REAL, usually 2 
 shephard_exponent_radius_config   = any positive REAL, usually 2 
 gcm_input_filename_config         = any CHARACTER string (maximum of 256 characters)
 starting_recordnr_config          = any positive INTEGER 
 choice_1D_lonlat_in_netcdf_config = .TRUE.
                                     .FALSE.
 gcm_x_axis_name_config            = any CHARACTER string (maximum of 128 characters)
 gcm_y_axis_name_config            = any CHARACTER string (maximum of 128 characters)
 mapped_gcm_field_1_config         = any CHARACTER string (maximum of 128 characters) 
 mapped_gcm_field_2_config         = any CHARACTER string (maximum of 128 characters)
 mapped_gcm_field_3_config         = any CHARACTER string (maximum of 128 characters)
 mapped_gcm_field_4_config         = any CHARACTER string (maximum of 128 characters)
 mapped_gcm_field_5_config         = any CHARACTER string (maximum of 128 characters)
 mapped_gcm_field_6_config         = any CHARACTER string (maximum of 128 characters)
 mapped_gcm_field_7_config         = any CHARACTER string (maximum of 128 characters)
 mapped_gcm_field_8_config         = any CHARACTER string (maximum of 128 characters)
 mapped_gcm_field_9_config         = any CHARACTER string (maximum of 128 characters)
 gcm_to_im_factor_field_1_config   = any REAL
 gcm_to_im_factor_field_2_config   = any REAL
 gcm_to_im_factor_field_3_config   = any REAL
 gcm_to_im_factor_field_4_config   = any REAL
 gcm_to_im_factor_field_5_config   = any REAL
 gcm_to_im_factor_field_6_config   = any REAL
 gcm_to_im_factor_field_7_config   = any REAL
 gcm_to_im_factor_field_8_config   = any REAL
 gcm_to_im_factor_field_9_config   = any REAL
 gcm_to_im_shift_field_1_config    = any REAL
 gcm_to_im_shift_field_2_config    = any REAL
 gcm_to_im_shift_field_3_config    = any REAL
 gcm_to_im_shift_field_4_config    = any REAL
 gcm_to_im_shift_field_5_config    = any REAL
 gcm_to_im_shift_field_6_config    = any REAL
 gcm_to_im_shift_field_7_config    = any REAL
 gcm_to_im_shift_field_8_config    = any REAL
 gcm_to_im_shift_field_9_config    = any REAL
 im_created_filename_config        = any CHARACTER string (maximum of 256 characters)
 choice_fast_map_GGM_to_IM_config  = .TRUE.
                                     .FALSE.
 input_fast_map_GCM_to_IM_config   = .TRUE.
                                     .FALSE.
 choice_radius_GCM_to_IM_config    = .TRUE.
                                     .FALSE.
 R_search_GCM_to_IM_config         = any positive REAL
 im_input_filename_config          = any CHARACTER string (maximum of 256 characters)
 mapped_im_field_1_config          = any CHARACTER string (maximum of 128 characters)
 mapped_im_field_2_config          = any CHARACTER string (maximum of 128 characters)
 mapped_im_field_3_config          = any CHARACTER string (maximum of 128 characters)
 mapped_im_field_4_config          = any CHARACTER string (maximum of 128 characters)
 mapped_im_field_5_config          = any CHARACTER string (maximum of 128 characters)
 mapped_im_field_6_config          = any CHARACTER string (maximum of 128 characters)
 mapped_im_field_7_config          = any CHARACTER string (maximum of 128 characters)
 mapped_im_field_8_config          = any CHARACTER string (maximum of 128 characters)
 mapped_im_field_9_config          = any CHARACTER string (maximum of 128 characters)
 im_to_gcm_factor_field_1_config   = any REAL
 im_to_gcm_factor_field_2_config   = any REAL
 im_to_gcm_factor_field_3_config   = any REAL
 im_to_gcm_factor_field_4_config   = any REAL
 im_to_gcm_factor_field_5_config   = any REAL
 im_to_gcm_factor_field_6_config   = any REAL
 im_to_gcm_factor_field_7_config   = any REAL
 im_to_gcm_factor_field_8_config   = any REAL
 im_to_gcm_factor_field_9_config   = any REAL
 im_to_gcm_shift_field_1_config    = any REAL
 im_to_gcm_shift_field_2_config    = any REAL
 im_to_gcm_shift_field_3_config    = any REAL
 im_to_gcm_shift_field_4_config    = any REAL
 im_to_gcm_shift_field_5_config    = any REAL
 im_to_gcm_shift_field_6_config    = any REAL
 im_to_gcm_shift_field_7_config    = any REAL
 im_to_gcm_shift_field_8_config    = any REAL
 im_to_gcm_shift_field_9_config    = any REAL
 gcm_created_filename_config       = any CHARACTER string (maximum of 256 characters)
 choice_fast_map_IM_to_GCM_config  = .TRUE.
                                     .FALSE.
 input_fast_map_IM_to_GCM_config   = any CHARACTER string (maximum of 256 characters)
 choice_radius_IM_to_GCM_config    = .TRUE.
                                     .FALSE.
 R_search_IM_to_GCM_config         = any positive REAL
 do_oblimap_post_processing_config = .TRUE.
                                     .FALSE.
 R_earth_config                    = any positive REAL
 
 thomas reerink
