 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 nb  -ca     27.642   31.468  0.1098
  
 covariance matrix (rad2/m.y.2 e-10
     104.9    -139.8      52.8
    -139.8     380.6    -100.5
      52.8    -100.5      97.3
  
