 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 sa  -ON    -36.405  -44.692  2.5924
  
 covariance matrix (rad2/m.y.2 e-10
    1827.8     -90.9      -9.1
     -90.9    2376.7     208.8
      -9.1     208.8    2102.4
  
