Preliminary Report of the Global 3mm-VLBI Session Oct. 12-14, 2006 ==================================================== General: the following stations have observed PV, Onsa, Metsa, VLBA(8) PdB did not participate due to scheduled general upgrade of instrument EB did not participate due to scheduled installation of new sub-reflector The whole experiment was scheduled in dual polarisation. PV and VLBA support dual pol. Onsala supports only LCP. likely receiver problems at MH, quality of data uncertain high receiver noise likely, expect only one of the two polarisation channels useable (LCP). Station Details: Pico Veleta: excellent weather, clear sky, low Tsys, no major downtime MH: broken RCP channel, hot-cold performance of the working LCP channel is down to 2dB, most likely almost unusable 3mm RX. Onsa: first two hours no Tsys in POSTOB Occasionally some high very TSYS. Could have been problem with the hot load. no major problems reported VLBA: VLBA_BR focus (FRM) is not working properly, attempt to repair unsucessfull, BR taken out of project Oct. 12: clear at PT, LA, OV, BR, MK partly cloudy at NL, FD, KP Oct. 13: clear NL, FD, LA, overcast and later also rain at OV broken clouds KP LA Has low switched power levels and high T_sys Oct. 14: OV, PT, rain towards end of exp.