Doppler satellite observations of polar motion

Observations on Navy navigation satellites made by thirteen Doppler receiving stations have been used to determine the position of the earth's pole daily for a six month period of time. A precision of one meter has been obtained on the basis of forty-eight hours of observations on one satellite. No bias is apparant between computations based on different satellites, but differences of about a meter exist with respect to values published by the Bureau International de l'Heure on the basis of astronomical observations.