 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 nz  -sc     52.159  -99.072  0.5652
  
 covariance matrix (rad2/m.y.2 e-10
     360.4    -220.8    -981.2
    -220.8     716.6    1009.8
    -981.2    1009.8    4435.3
  
