 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 au  -pa     60.082    6.330  1.0785
  
 covariance matrix (rad2/m.y.2 e-10
     123.4     -75.3      94.6
     -75.3     140.6     -57.0
      94.6     -57.0     227.8
  
