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Michel Blanc(1), Olga Prieto-Ballesteros(2), Nicolas André(1) , Javier Gomez-Elvira(2), Geraint Jones(3), Veerle Sterken(4,5), William Desprats(1,6), Leonid I. Gurvits (7,16,38), Krishan Khurana(8), Georges Balmino(39), Aljona Blöcker(9), Renaud Broquet(10), Emma Bunce(11), Cyril Cavel(10), Gaël Choblet(12), Geoffrey Colins(13), Marcello Coradini( 14), John Cooper(15), Dominic Dirkx(16), Dominique Fontaine(40), Philippe Garnier(1), David Gaudin(6), Paul Hartogh(17) , Hauke Hussmann(31), Antonio Genova(18), Luciano Iess(18), Adrian Jäggi(4), Sascha Kempf(19), Norbert Krupp(17), Luisa Lara(20), Jérémie Lasue(1), Valéry Lainey(21), François Leblanc(22), Jean-Pierre Lebreton(23), Andrea Longobardo(24), Ralph Lorenz(25), Philippe Martins(26), Zita Martins(27), Jean-Charles Marty(41), Adam Masters(28), David Mimoun(6), Ernesto Palumba(33), Victor Parro(2), Pascal Regnier(10), Joachim Saur(29), Adriaan Schutte(30), Edward C. Sittler(15), Tilman Spohn(31), Ralf Srama(42), Katrin Stephan(31), Károly Szegő(32), Federico Tosi(33), Steve Vance(34), Roland Wagner(31), Tim Van Hoolst(35), Martin Volwerk(36), Jan-Erik Wahlund(41), Frances Westall(37), Peter Wurz(4) Affiliations: (1)IRAP, France ; (2)INTA-CAB, Spain; (3)MSSL/UCL, UK ; (4)University of Bern, Switzerland; (5)ETH Zürich, Switzerland; (6)ISAE, France; (7)Joint Institute for VLBI ERIC, Dwingeloo, The Netherlands; (8)UCLA, USA ; (9) Royal

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