 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 NI  -xx     -3.288 -174.488  3.3136
  
 covariance matrix (rad2/m.y.2 e-10
    3566.5     -44.6      88.7
     -44.6    3779.0     -55.7
      88.7     -55.7    3675.2
  
