 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 nz  -na     60.409 -115.273  0.5981
  
 covariance matrix (rad2/m.y.2 e-10
     211.6      79.4    -239.7
      79.4     294.9    -102.5
    -239.7    -102.5     731.4
  
