 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 nb  -na     79.222   30.123  0.2378
  
 covariance matrix (rad2/m.y.2 e-10
      59.1     -31.3      24.1
     -31.3      24.8      -6.6
      24.1      -6.6      40.6
  
