 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 ri  -sc     20.169 -107.323  4.3896
  
 covariance matrix (rad2/m.y.2 e-10
   23956.9   77356.9  -29109.8
   77356.9  257972.6  -92408.6
  -29109.8  -92408.6   39410.6
  
