 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 nb  -yz    -28.782  -18.801  0.1688
  
 covariance matrix (rad2/m.y.2 e-10
     222.1      83.2     -40.4
      83.2     484.5     161.5
     -40.4     161.5     331.1
  
