The file fwd_large.mat contains 3 structures containing the tidal
field data

   ibtm   (the tidal fields)
   cgrid  (the positional data)
   obc    (boundary condition data)

ibtm = 

               h: [250x240x6 double] bathymetry
               u: [250x240x6 double] zonal barotropic velocity
               v: [250x240x6 double] meridional barotropic velocity
               U: [250x240x6 double] zonal transport
               V: [250x240x6 double] meridional transport
              fu: [6x1 double]
          kappaD: [6x1 double]
    kappa_method: [6x4 char]
           nameu: [6x4 char]
        obcfilen: '/home/oleg/ibtm/domains/qpe/work/../mat/obc_large.mat'
        uv_units: '[m/s]'
        UV_units: '[m^2/s]'
         h_units: '[m]'
        fu_units: '[cph]'

cgrid = 

        hlon: [250x240 double]  longitudes for tidal elevations
        hlat: [250x240 double]  latitudes for tidal elevations
        ulon: [250x240 double]  longitudes for zonal velocities
        ulat: [250x240 double]  latitudes for zonal velocities
        vlon: [250x240 double]  longitudes for meridional velocities
        vlat: [250x240 double]  latitudes for meridional velocities
        hcut: 5
       hmask: [250x240 logical]  land/sea mask for tidal elevations
       umask: [250x240 logical]  land/sea mask for zonal velocities
       vmask: [250x240 logical]  land/sea mask for meridional velocities
       htopo: [250x240 double]   topography at elevation locations
       utopo: [250x240 double]   topography at zonal velocity locations
       vtopo: [250x240 double]   topography at meridional velocity locations
        iobc: [250x240 logical]
    topofile: '/home/logutov/data/coasts/mat/topo_combo_qpe.mat'

obc = 

           h: [250x240x6 double]
           u: [250x240x6 double]
           v: [250x240x6 double]
           U: [250x240x6 double]
           V: [250x240x6 double]
          fu: [6x1 double]
       nameu: [6x4 char]
    obcfilen: '/home/oleg/ibtm/domains/qpe/work/../mat/tpxo7.1_local.mat'
    uv_units: '[m/s]'
    UV_units: '[m^2/s]'
     h_units: '[m]'

diary off