1. European Union Agency for Space Programme (EUSPA), Galileo Reference Centre (GRC), Zwarteweg 53, 2201 AA Noordwijk, The Netherlands
2. Geodetic Institute, Norwegian Mapping Authority (NMA), Kartverksveien 21, 3511 Hønefoss, Norway
3. Department of Geodesy and Geoinformation, TU Wien (TUW), Wiedner Hauptstraße 8-10, 1040 Wien, Austria
4. Centrum Badań Kosmicznych Polskiej Akademii Nauk (SRC), Bartycka 18A Str., 00-716 Warsaw, Poland