 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 ri  -co     17.539 -101.766  3.4081
  
 covariance matrix (rad2/m.y.2 e-10
   25000.3   78535.6  -28716.3
   78535.6  258467.0  -94658.9
  -28716.3  -94658.9   34936.3
  
