 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 NI  -sw      6.563  174.739  4.2827
  
 covariance matrix (rad2/m.y.2 e-10
  134122.0  -65936.1 -228022.7
  -65936.1   40345.1  116392.0
 -228022.7  116392.0  406559.8
  
