 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 nz  -xx     46.235 -101.056  0.6957
  
 covariance matrix (rad2/m.y.2 e-10
      74.7     147.1    -120.7
     147.1     563.6    -199.2
    -120.7    -199.2     332.2
  
