The two IVS-stations Onsala (Sweden) and Tsukuba (Japan) participate both in the 15-day Continuous VLBI Campaign 2014 (CONT14) which is performed from 6th May through 20th May, 2014. During the sessions the observed data from Onsala and Tsukuba are e-transferred in real-time or near real-time to the VLBI-correlator at Tsukuba. At Tsukuba the Onsala data are converted in near real-time from the Mark5 to the K5-format, subsequently correlated with the corresponding Tsukuba-data, and a K5-correlator output is created. An analysis is conducted with several tens of K5-correlator outputs and dUT1 is estimated automatically [1]. With each new scan incoming the oldest scan is left out from the repeated analysis so that the analysis window includes always the most recent scans. Using this strategy, dUT1 can be monitored in near real-time already during the ongoing IVS-session.

On this website, webcam images of two stations which is updated every few minutes, correlation plots of the most recent scan, and the continuously estimated dUT1 results together with a priori dUT1 values are available.

[1] Hobiger, T., et al.: Fully automated VLBI analysis with c5++ for ultra-rapid determination of UT1, Earth Planets Space, 62, 933-937, 2010.