Recent Progress and Future Perspectives of the ... · Recent Progress and Future Perspectives of...
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Ministry of Land, Infrastructure, Transport and Tourism Geospatial Information Authority of Japan
Recent Progress and Future
Perspectives of the International
VLBI Service for Geodesy and
Astrometry (IVS)
Shinobu Kurihara
Geospatial Information Authority of Japan
and
many colleagues of the IVS
18th International Workshop on Laser Ranging
11-15 November 2013, Fujiyoshida, Japan
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Geospatial Information Authority of Japan
Contents
1. Overview of IVS and VLBI2010
2. VGOS progress in the world
3. VGOS project in Japan
4. Toward GGOS
5. Summary
2/16
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Geospatial Information Authority of Japan
International VLBI Service for
Geodesy and Astrometry
• Established in 1999 under IAG and IAU
• 83 Permanent Components, representing
43 institutions in 21 countries
3/16
ORGANIZATION of IVS
COMPONENTS MAP
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Geospatial Information Authority of Japan
VLBI2010
• IVS WG3: started discussion on the
next generation VLBI (2005~).
• VLBI2010 Committee: considered the
concrete system for VLBI2010. – Final report (2009) “Design Aspects of the VLBI2010
System”
• System for VLBI2010 contains;
① 12-m diameter dish & 12˚/s fast moving
② 2~14GHz broad-band receivers
③ High speed sampler, Digital Backend
VGOS
VLBI Global Observing System
4/16
GGOS
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Geospatial Information Authority of Japan
VGOS World
5/16
planning phase
funded
under construction or just before operation
proposal submitted
based on available information September 2013 by H. Hase, V2PEG
operational(broad-band)
operational (legacy S/X ) to be upgraded
Degree of progress of VGOS
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Geospatial Information Authority of Japan
New VGOS telescopes
6/16
GGAO (US)
Hobart
(Australia)
Ishioka (Japan)
Courtesy A. Niell
Courtesy
D. Behrend
Courtesy L. Langkaas
Ny-Ålesund
(Svalbard, Norway)
Zelenchukskaya (Russia) Courtesy
A. Ipatov
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Geospatial Information Authority of Japan
RAEGE, Spain
7/16
Santa Maria (Eastern Azores)
(August 2013)
Gómez-González
et al .(2013)
Yebes
(August 2013)
Courtesy: J.A. Lopez
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Geospatial Information Authority of Japan
Twin Telescope Wettzell, Germany
8/16 Courtesy A. Nothnagel
Inauguration in April 2013
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Geospatial Information Authority of Japan
Onsala Tvilling Teleskop, Sweden
9/16
OTT1
OTT2
20 m
25 m
Courtesy R. Haas
● Onsala
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Geospatial Information Authority of Japan
VGOS Station in Japan
• FY2011~FY2013
– 13.2-m telescope
– Broadband front-end
(feeds, receivers)
– Hydrogen masers
– Up-down convertor
– Data acquisition
system
(Sampler, storage, …)
– 10Gbps network
10/16
Ishioka VLBI Station
GSI HQ / Tsukuba
32-m VLBI Station
17km WE ARE HERE.
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Geospatial Information Authority of Japan
Ishioka Geodetic Observing Station
Ishioka Geodetic Observing Station
Ibaraki pref. Livestock Research Center
golf course
茨城県畜産センター
石 岡 市
かすみがうら市 11/16
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Geospatial Information Authority of Japan
Ishioka Geodetic Observing Station
pillar
pillar pillar
pillar
ground marker
VLBI telescope
containers
Building (planning)
GNSS
0m 20m 40m
Total site area: 13,000m2
12/16
Laser Ranging facilities?
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Geospatial Information Authority of Japan
DORIS stations co-located with other IERS
techniques (VLBI, SLR or GNSS)
13/16
Courtesy J. Saunier (IGN, France)
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Synergy of VLBI and SLR for GGOS
14/16
Badary (Russia)
Courtesy A. Ipatov & Y. Bondarenko
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Geospatial Information Authority of Japan
RFI at GGOS station
• Intra-site RFI transmitted by DORIS beacon and
SLR radar for aircraft avoidance
– DORIS: 401.25 MHz, 2.036 GHz
– SLR radar: 9.4 GHz ?
– VLBI receives 2-14 GHz
• Physical barriers (e.g., buildings, topography,
special built structures), notch filters, interlocking
of the SLR/VLBI scheduling, …
• Appreciated if SLR people could develop and
use a non-radar based system for aircraft
avoidance. 15/16
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Geospatial Information Authority of Japan
Summary
• IVS is enthusiastic about VGOS.
– Australia, Germany, Spain, Russia, …
• Ishioka VGOS telescope in Japan
– under construction
– complete by March 2014
• More co-located sites of multi-technique are
necessary for GGOS.
• However, intra-site RFI in the broad-band VLBI
telescope should be considered.
16/16
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Geospatial Information Authority of Japan
Thank you
for your attention.
VGOS: The New VLBI Network