 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 nz  -su     42.431 -105.939  0.3619
  
 covariance matrix (rad2/m.y.2 e-10
     401.4     272.4    -179.1
     272.4    1827.8      42.8
    -179.1      42.8     334.8
  
