 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 NH  -ar    -10.686   -6.271  2.1385
  
 covariance matrix (rad2/m.y.2 e-10
    1793.8     241.3     111.5
     241.3    2581.5      83.9
     111.5      83.9    1751.2
  
