 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 NB  -BH    -17.940 -154.590  0.3002
  
 covariance matrix (rad2/m.y.2 e-10
    7523.2     -75.3      94.6
     -75.3    7540.3     -57.0
      94.6     -57.0    7627.6
  
