 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 ND  -na     19.969  129.854  0.1553
  
 covariance matrix (rad2/m.y.2 e-10
    1828.2      61.0     -90.4
      61.0    2774.3     315.2
     -90.4     315.2    2082.0
  
