 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 sw  -JZ    -35.100 -105.842 23.0754
  
 covariance matrix (rad2/m.y.2 e-10
  135893.4  -65571.4 -228244.5
  -65571.4   43322.6  115965.2
 -228244.5  115965.2  408421.2
  
