Post doc researcher, Observatoire de Paris, Meudon, 1.1. - 31.7.2000, S. Pohjolainen.
Visit to the Ventspils International Radio Astronomy Center (VIRAC), Latvia, 18.3.2000, M. Tornikoski.
Invited participant in the ITP program on Astrophysical Turbulence, organized by the Institute for Theoretical Physics (ITP), University of California Santa Barbara, 10.4-14.5.2000. The visit was financed by ITP and National Science Foundation (USA), T. Liljeström.
Planck collaboration, 23-28.5.2000, Osservatorio Astronomico, Padova, Italy, A. Lähteenmäki.
Observations with the SEST, 13 -21.8.2000, SEST/ESO, La Silla, Chile, A. Lähteenmäki.
Visit to Jodrell Bank Observatory, UK, 19-21.10., A. Lähteenmäki, M. Tornikoski.