 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 yz  -NI      8.578    3.239  3.2668
  
 covariance matrix (rad2/m.y.2 e-10
    3696.4    -230.3     140.2
    -230.3    3856.2     -12.3
     140.2     -12.3    3932.0
  
