Conveners
Poster1-3: Authors in attendance
- Dirk Behrend (NVI, Inc./NASA Goddard Space Flight Center)
Sten Bergstrand
(SP Technical Research Institute of Sweden)
14/03/2016, 15:45
3: Stations, Correlators, and Operations Centers
Poster Presentation
We have used GPS-based local-tie measurements simultaneously with geo VLBI observations since 2008 during every geodetic VLBI session at Metsähovi. This system uses gimbal-mounted GNSS-antennas that are mounted on the reflector of the Metsähovi 14 m radio telescope. A similar system has been installed in 2013 at the Onsala 20 m radio telescope and been used for a large number of VLBI sessions,...
Mr
Ryoji Kawabata
(Geospatial Information Authority of Japan)
14/03/2016, 15:45
1: Advances in VGOS Stations and Technology
Poster Presentation
The Geospatial Information Authority of Japan (GSI) is constructing a new VGOS station in Ishioka. The construction of the 13-m antenna has been finished, and a new operation building will be completed by February 2016. Ishioka 13-m antenna is observing legacy S/X-band VLBI observation with Tsukuba 32-m antenna by using tri-band feed system. We have also carried out some broadband experiments...
Dr
David Gordon
(NVI, Inc./GSFC)
14/03/2016, 15:45
3: Stations, Correlators, and Operations Centers
Poster Presentation
Difxcalc is a version of calc11 modified specifically for the
DiFX correlator. It is a replacement for the calc9.1
'calcserver' currently in use. To create difxcalc, all
of the Mark3 database handler calls were removed from calc11
and new input, output and initialization modules were
written and the flow of the program was modified
for correlator usage. Difxcalc takes as its
input the...
Yidan Huang
(Shanghai Astronomical Observatory)
14/03/2016, 15:45
3: Stations, Correlators, and Operations Centers
Poster Presentation
The beacon of CE-3 satellite have several tones for communication and VLBI tracking. In order to improve data transferring and processing efficiency, we tried the local-correlation method which was different from the one used in CE-3 project. The Time delay model used in local-correlation experiment also differed from normal time delay model. The result shows that there are a few dozen meters...
Dr
Pablo de Vicente
(Observatorio de Yebes (IGN))
14/03/2016, 15:45
1: Advances in VGOS Stations and Technology
Poster Presentation
A series of joint test observations using three 13-m VGOS antennas were carried on between September and November, 2015. These were include 256 Mbps experiments as well as first 2 Gbps observations. Different working setups of DBBC were tested at Yebes, data recorded, and transferred to IAA Correlator Center. Combined correlation of mixed bandwidth data from KVAZAR antennas and Yebes were...
Dr
Alexander Neidhardt
(Technische Universität München, Geodätisches Observatorium Wettzell)
14/03/2016, 15:45
3: Stations, Correlators, and Operations Centers
Poster Presentation
A new release of the telescope control software e-RemoteCtrl, which is designed to run VLBI observations remotely, has been extended with new monitoring capabilities.
The software extension is a test for further monitoring and control infrastructures for complete VLBI networks. The poster shows Ideas and already implemented elements.
Dr
Alexander Neidhardt
(Technische Universität München, Geodätisches Observatorium Wettzell)
, Dr
Pablo de Vicente
(Observatorio de Yebes (IGN))
14/03/2016, 15:45
2: VGOS Strategies and Expected Results
Poster Presentation
The organization of first fast slewing observations with new VGOS antennas was decided during the VTC meeting at Ponta Delgada. The goal was to observe S/X-schedules regularly, using the fast slewing capabilities of the antennas as long as they are equipped with classic S/X-capabilities. The poster/presentation discusses and shows first results of these observations.
Mrs
Cynthia Thomas
(NVI, Inc.)
14/03/2016, 15:45
3: Stations, Correlators, and Operations Centers
Poster Presentation
Continuous VLBI Campaigns (CONT) started in 1994 with the goal of demonstrating state of the art VLBI over a continuous period of time. The first CONT was followed by campaigns in 1995 and 1996. After a six year hiatus, CONT campaigns were organized approximately every three years from 2002 through 2014. In this presentation we primarily focus on the cornerstones of each CONT campaign....
Ms
Jiangying Gan
(Shanghai Astronomical Observatory,CAS)
14/03/2016, 15:45
3: Stations, Correlators, and Operations Centers
Poster Presentation
VLBI(Very Long Baseline Interferometry) is an important radio astronomy
technology, is widely used in deep-space probers high-precision measurement. The correlator as the core data pre-processing equipment of VLBI, its performance is very important. At present, China VLBI data acquisition system (CDAS) can collect
data 2Gbps, and multiband combination can reach 16Gbps or 32Gbps. For ensure...
Brian Corey
(MIT Haystack Observatory)
, Dr
Vincenza TORNATORE
(Politecnico di Milano - DICA)
14/03/2016, 15:45
2: VGOS Strategies and Expected Results
Poster Presentation
A number of new VGOS-radio telescopes are built or under construction, partly at new locations. VGOS radio telescopes enable observations in the range of 2-14 GHz. For this reason VGOS radio telescopes are much more receptive for unwanted radio frequency interference. RFI originates from local transmitting devices as well as from space based transmitting systems. Some space-borne devices may...
Dirk Behrend
(NVI, Inc.)
14/03/2016, 15:45
2: VGOS Strategies and Expected Results
Poster Presentation
In February 2014, the VGOS Project Executive Group (VPEG) presented the
so-called VGOS Observing Plan, which outlined possible steps on how to go from initial VGOS broadband tests to intermediate observing scenarios to the fully operational VGOS system. The document introduced VGOS trial campaigns as the initial means to accustom the VGOS stations as well as the subsequent component types to...
Dr
Nataliya Zubko
(Finnish Geospatial Research Institute)
14/03/2016, 15:45
3: Stations, Correlators, and Operations Centers
Poster Presentation
The Metsähovi Geodetic Fundamental Station is a key infrastructure of the Finnish Geospatial Research Institute (FGI). It is a Global Geodetic Observing System (GGOS) core site, i.e., member of global network of geodetic stations which is used in maintaining global terrestrial and celestial reference frames, computing precise orbits of satellites, and for geophysical studies. Metsähovi is one...
Dr
Bill Petrachenko
(Natural Resources Canada)
14/03/2016, 15:45
2: VGOS Strategies and Expected Results
Poster Presentation
The VLBI Global Observing System (VGOS) has been designed to take advantage of advances in data bandwidths, allowing for smaller and faster antennas, wider bandwidths, and shorter observation durations. Here, schedules for a "realistic" VGOS network, frequency sequences, and expanded source lists are presented using a new source-based scheduling algorithm. VGOS aims for continuous observations...
Johannes Boehm
(Technische Universität Wien)
14/03/2016, 15:45
3: Stations, Correlators, and Operations Centers
Poster Presentation
The VLBI group at Technische Universität Wien (TU Wien) is going to run a VLBI software correlator for scientific purposes. For that reason, DiFX is installed on the Vienna Scientific Cluster 3 (VSC-3) consisting of 2020 nodes, each equipped with 2 processors (Intel Xeon E5-2650v2, 2.6 GHz, 8 cores). Of course, only a fraction of the total number of cores will be available for VLBI...
Prof.
Ludwig Combrinck
(HartRAO)
14/03/2016, 15:45
1: Advances in VGOS Stations and Technology
Poster Presentation
Very long baseline interferometry (VLBI) is used in geodesy to determine a telescope’s position relative to the galactic centre. A modern, fast slewing radio telescope measuring approximately 13 metres in diameter have been chosen to be used in the VLBI Global Observing System (VGOS), which will help improve the accuracy across global baselines from around 1 cm down to 1 mm. In 2014 HartRAO...
zhijun xu
(Shanghai Astronomical Observatory, CAS)
14/03/2016, 15:45
3: Stations, Correlators, and Operations Centers
Poster Presentation
The hardware correlator have been used in Chinese Chang'E missions. Recently, a hardware correlator based on uniboard has been developed. This article presents the development of hardware correlator at SHAO and some results.
Mr
Christian Plötz
(Bundesamt für Kartographie und Geodäsie)
14/03/2016, 15:45
3: Stations, Correlators, and Operations Centers
Poster Presentation
The German Antarctic Receiving Station (GARS) O’Higgins started in the early 1990th with regular VLBI operations. Because of its remote position on the Antarctic Peninsula, the VLBI observation was mostly restricted to the Antarctic summer month. New equipment, a continuous operation by the German Aerospace Center (DLR), and new realizations of observation schedules may open the door for...
Dr
Kazuhiro Takefuji
(NICT)
, Dr
Mamoru Sekido
(National Institute of Information and Communications Technology)
14/03/2016, 15:45
1: Advances in VGOS Stations and Technology
Poster Presentation
The Kashima 34 m radio telescope, the cassegrain optics is currently realized 3.2GHz to 14 GHz receiver system by installing the NINJA feed. Furthermore a direct sampler GALAS easily connect four 1GHz bandwidth without any analogue frequency converter and phase-cal.
VGOS, EHT and other astronomy VLBI highly demand broadband system for better delay determination, shorter integration time and...
Dr
Halfdan Pascal Kierulf
(Norwegian Mapping Authority)
14/03/2016, 15:45
2: VGOS Strategies and Expected Results
Poster Presentation
In February 2015 the UN General Assembly adopted the resolution “A Global Geodetic Reference Frame for Sustainable Development” - the first resolution recognizing the importance of a globally-coordinated approach to geodesy. The GGRF Working Group is working on the development of a roadmap that will describe how governments can contribute to the sustainability and enhancement of the Global...
Dr
Pablo de Vicente
(Observatorio de Yebes (IGN))
14/03/2016, 15:45
3: Stations, Correlators, and Operations Centers
Poster Presentation
An update of the deployment and activities at the Spanish/Portuguese RAEGE project (“Atlantic Network of Geodynamical and Space Stations”) is presented. Regular observations with Yebes radio telescope are ongoing. Commissioning of the radio telescope at Santa Maria is advanced, and site works for a new station in Tenerife (Canary Islands) have started. Technological developments on receivers...
