 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 NH  -yz     -6.165   -3.375  2.5391
  
 covariance matrix (rad2/m.y.2 e-10
    1704.0    -155.0      45.6
    -155.0    1846.6      44.8
      45.6      44.8    1835.3
  
