 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 nz  -nb     40.713 -119.624  0.4392
  
 covariance matrix (rad2/m.y.2 e-10
     137.0     116.2    -211.4
     116.2     324.5     -80.4
    -211.4     -80.4     533.7
  
