 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 ON  -nz     23.056  127.750  2.5386
  
 covariance matrix (rad2/m.y.2 e-10
    1815.4     134.5     -81.6
     134.5    3181.3    -439.1
     -81.6    -439.1    2141.0
  
