1. Astro Space Center of Lebedev Physical Institute, Profsoyuznaya Str 84/32, 117997 Moscow, Russia
2. Sternberg Astronomical Institute, Moscow State University, Universitetskii pr. 13, 119992 Moscow, Russia
3. IAASARS, National Observatory of Athens, Vas. Pavlou & I. Metaxa, 15236 Penteli, Greece
4. Moscow Institute of Physics and Technology, Dolgoprudny, Institutsky per., 9, Moscow region 141700, Russia
5. Max-Planck-Institut für RadioAstronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
6. Institute of Applied Astronomy of the Russian Academy of Sciences, 191187, Kutuzov embankment, 10, St. Petersburg, Russia
7. Astronomy Department, University of Michigan, Ann Arbor, MI 48109-1042, USA
8. Metsähovi Radio Observatory, Aalto University, Metsähovintie 114, FI-02540 Kylmälä, Finland
9. Department of Electronics and Nanoengineering, Aalto University, PO Box 15500, FI-00076 Aalto, Finland
10. Tartu Observatory, Observatooriumi 1, 61602 Tõravere, Estonia
11. Joint Institute for VLBI ERIC, PO Box 2, NL-7990 AA Dwingeloo, the Netherlands
12. Department of Astrodynamics and Space Missions, Delft University of Technology, Kluyverweg 1, NL-2629 HS Delft, the Netherlands