 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 co  -nb     18.588 -133.956  1.0247
  
 covariance matrix (rad2/m.y.2 e-10
     858.0      69.5    -747.5
      69.5     976.2    -175.5
    -747.5    -175.5     841.9
  
