 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 su  -nb     23.597 -160.365  0.1057
  
 covariance matrix (rad2/m.y.2 e-10
     261.2     -33.0     -36.4
     -33.0    1149.7     246.0
     -36.4     246.0     322.5
  
