 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 ar  -su     21.417   22.852  0.4458
  
 covariance matrix (rad2/m.y.2 e-10
     401.0     201.4     112.0
     201.4    1554.8     332.1
     112.0     332.1     272.9
  
