 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 NH  -sa      1.523   -4.386  2.4995
  
 covariance matrix (rad2/m.y.2 e-10
    1663.7      64.0     -54.7
      64.0    2069.9     164.0
     -54.7     164.0    1807.0
  
