Ultra rapid dUT1 estimations from e-VLBI sessions

Yasuhiro Koyama, Tetsuro Kondo, Mamoru Sekido, Thomas Hobiger, Hiroshi Takiguchi, Kozin Wada, Shinobu Kurihara, Rüdiger Haas, Jan Wagner, Ari Mujunen, Jouko Ritakari

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

4 Citations (Scopus)


Promptness of the data processing of the international VLBI observations has been continuously improvedin the past decades. In particular, e-VLBI technique has proved that it has a capability to shorten the latency by transferring the observed data to the correlator by using high speed communication networks. The method has been introduced to routine intensive VLBI sessions to monitor dUT1. To improve the promptness even further, we started an initiative to develop automated data transfer and data processing systems using Europe-Japan baselines.On February 21, 2008, we succeeded to demonstrate the effectiveness of the developed systems and estimated the dUT1 parameter 3 minutes 45 seconds after the last scan of the one hour intensive style e-VLBI session. This achievement was realized by the developments of the K5/VSSP32 data acquisition terminal, automated data processing and analysis software.

Original languageEnglish
Title of host publicationAdvances in Geosciences
Subtitle of host publicationVolume 20: Solid Earth (SE)
PublisherWorld Scientific
Number of pages8
ISBN (Electronic)9789812838186
ISBN (Print)9812838171, 9789812838179
Publication statusPublished - 1 Jan 2010
MoE publication typeA3 Book section, Chapters in research books


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