 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 nz  -au      9.076 -122.479  0.9540
  
 covariance matrix (rad2/m.y.2 e-10
     321.5     468.2    -134.3
     468.2     997.9    -145.4
    -134.3    -145.4     276.3
  
