 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 BU  -sa     -5.245  -76.561  2.1431
  
 covariance matrix (rad2/m.y.2 e-10
    1867.0    -207.1      -5.0
    -207.1    3040.9     294.4
      -5.0     294.4    2093.9
  
