 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 sw  -MN      2.851  -29.892 52.6994
  
 covariance matrix (rad2/m.y.2 e-10
  133510.5  -65860.8 -228117.3
  -65860.8   39716.4  116449.1
 -228117.3  116449.1  405843.9
  
