 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 ri  -nb     18.253 -109.008  4.3218
  
 covariance matrix (rad2/m.y.2 e-10
   23711.2   77659.3  -28429.1
   77659.3  257540.6  -93703.9
  -28429.1  -93703.9   35477.8
  
