JpGU-AGU Joint Meeting 2017

Presentation information

[EE] Oral

S (Solid Earth Sciences) » S-GD Geodesy

[S-GD01] [EE] Geodetic Technologies, Networks and Strategies for Global Geodetic Observing System (GGOS)

Wed. May 24, 2017 1:45 PM - 3:15 PM 202 (International Conference Hall 2F)

convener:Ryoji Kawabata(Geospatial Information Authority of Japan), Michael R Pearlman(Center for Astrophysics), Takahiro Wakasugi(Geospatial Information Authority of Japan), Chairperson:Michael Pearlman(Center for Astrophysics), Chairperson:Takahiro Wakasugi(Geospatial Information Authority of Japan)

2:30 PM - 2:45 PM

[SGD01-04] VGOS development for Ishioka 13-m antenna

*Takahiro Wakasugi1, Michiko Umei1, Tomoo Toyoda1, Masayoshi Ishimoto1, Ryoji Kawabata1, Basara Miyahara1 (1.Geospatial Information Authority of Japan)

The Geospatial Information Authority of Japan (GSI) constructed a new VLBI facilities in Ishioka. It is designed for the next-generation VLBI system called VGOS, which is promoted by the International VLBI Service for Geodesy and Astrometry (IVS) in order to meet the requirements of Global Geodetic Observing System (GGOS). In addition to the VGOS facilities, Ishioka has GNSS Continuously Operating Reference Stations and a gravity measurement facility in order to contribute to GGOS as a core observatory.
Since February 2015, the Ishioka 13-m antenna observed legacy S/X sessions with Tsukuba 32-m to obtain accurate positions of the new site. Then, Ishioka has started the international observations dedicated for Earth rotation measurement taking over the role of Tsukuba 32-m from the beginning of 2017. In parallel with these legacy observations, we have carried out several broadband observations compatible with VGOS frequency setup. From August to September 2016, we installed a new signal chain including QRFH (Quadruple-ridged flared horn), up-down converters, and high speed digital samplers at Ishioka in order to participate in VGOS Trial sessions which were broadband observations coordinated by IVS. Several experimental broadband observations with Kashima 34-m of NICT and Hobart 12-m of AuScope were also performed, and the compatibility of equipment between Ishioka and other overseas stations was confirmed. We report on the recent development of VGOS equipment and results of the legacy and broadband sessions for Ishioka.