 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 nb  -eu     21.659  -20.418  0.1308
  
 covariance matrix (rad2/m.y.2 e-10
      72.7     -32.1      38.7
     -32.1      18.0     -19.7
      38.7     -19.7      29.7
  
