Ultra-Rapid DUT1-Observations with E-VLBI

• Published in: Artificial Satellites
• Main Authors: Haas, Rüdiger, Sekido, Mamoru, Hobiger, Thomas, Kondo, Tetsuro, Kurihara, Shinobu, Tanimoto, Daisuke, Kokado, Kensuke, Wagner, Jan, Ritakari, Jouko, Mujunen, Ari
• Language: unknown
• Published: 2010
• Subjects: Astronomy; Astrophysics and Cosmology; Other Engineering and Technologies not elsewhere specified; Other Earth and Related Environmental Sciences; UT1; e-VLBI; earth rotation; geodetic VLBI; Fennoscandian
• Online Access: https://doi.org/10.2478/v10018-010-0007-6; https://research.chalmers.se/en/publication/128467

We give a short overview about the achievements of the Fennoscandian- Japanese ultra-rapid dUT1-project that was initiated in early 2007. The combination of real-time data transfer, near real-time data conversion and correlation, together with near-real time data analysis allows to determine dUT1 with a very low latency of less than 5 minutes after the end of a VLBI-session. The accuracy of these ultra-rapid dUT1-results is on the same order than the results of the standard rapid-service of the International Earth Rotation and Reference Frame Service (IERS). The ultra-rapid approach is currently extended to 24 hour sessions and is expected to become an important contribution for the future next generation VLBI system called VLBI2010.