 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 nz  -yz     31.267  -94.161  0.3954
  
 covariance matrix (rad2/m.y.2 e-10
     362.3     388.5    -182.8
     388.5    1162.0     -40.7
    -182.8     -40.7     341.7
  
