1. Space Environment Research Centre; Canberra ACT Australia
2. Space Research Institute; Austrian Academy of Sciences; Graz Austria
3. Institute of Geodesy and Geoinformatics; Wrocław University of Environmental and Life Sciences; Wrocław Poland
4. Astronomical Observatory of Odessa Mechnikov University; Odessa Ukraine
5. Changchun Observatory, NAO; Chinese Academy of Sciences; Changchun China
6. Helmholtz Center Potsdam, German Research Centre for Geosciences GFZ; Potsdam Germany
7. Natural Environment Research Council; Space Geodesy Facility; Herstmonceux UK
8. Agenzia Spaziale Italiana, Centro di Geodesia Spaziale “G. Colombo”; Matera Italy
9. Royal Observatory of the Spanish Navy; San Fernando Spain
10. Institute of Astronomy; University of Latvia; Riga Latvia
11. Space Science Division; Korea Astronomy and Space Science Institute; Daejeon South Korea
12. EOS Space Systems Pty. Ltd.; Canberra ACT Australia
13. Space Research Centre, Polish Academy of Sciences; Astrogeodynamic Observatory; Borowiec Poland