 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 ca  -xx     35.196  -92.624  0.2862
  
 covariance matrix (rad2/m.y.2 e-10
     105.6    -136.5      12.2
    -136.5     485.0     -40.8
      12.2     -40.8     164.9
  
