Global Solutions - Quarterly Solutions
USNO produces quarterly global solutions from more than 6700 VLBI databases that span more than 40 years. These solutions are used to update the a priori values used for measuring EOPs from daily UT1-UTC intensive sessions as well as the 24-hour sessions. In addition, the quarterly global solutions update the Celestial Reference Frame source positions and the Terrestrial Reference Frame station positions and velocities. Here, you can find the results of our quarterly VLBI global solutions.
Most Recent Quarterly VLBI Global Solution Products: