 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 na  -ca    -73.865   32.600  0.1901
  
 covariance matrix (rad2/m.y.2 e-10
      45.8    -108.5      28.7
    -108.5     356.0     -93.9
      28.7     -93.9      56.5
  
