 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 su  -xx     50.056  -95.022  0.3368
  
 covariance matrix (rad2/m.y.2 e-10
     216.4    -131.3      20.6
    -131.3     942.6     185.3
      20.6     185.3     189.6
  
