 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 ri  -xx     20.245 -107.286  4.5359
  
 covariance matrix (rad2/m.y.2 e-10
   23657.1   77568.7  -28378.9
   77568.7  257085.9  -93914.7
  -28378.9  -93914.7   35257.4
  
