 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 nz  -ca     53.229 -108.875  0.4212
  
 covariance matrix (rad2/m.y.2 e-10
     257.2     -29.1    -211.0
     -29.1     651.2    -197.0
    -211.0    -197.0     788.9
  
