 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 yz  -su     22.534  121.333  0.1017
  
 covariance matrix (rad2/m.y.2 e-10
     120.4    -275.2     -94.6
    -275.2     996.0     290.1
     -94.6     290.1     125.4
  
