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1 Artificial Satellites : Journal of Planetary Geodesy

1 2010

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Ultra-rapid dut1-observations with e-VLBI

Haas R., Sekido M., Hobiger T., Kondo T., Kurihara S., Tanimoto D., Kokado K., Wagner J., Ritakari J., Mujunen A.

Artificial Satellites : Journal of Planetary Geodesy

2010

Vol. 45, No. 2

75--79

We give a short overview about the achievements of the FennoscandianJapanese 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 nearreal 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.