Conveners
Oral1: Advances in VGOS Stations and Technology: Part 1
- Evgeny Nosov (Institute of Applied Astronomy of RAS (IAA RAS))
- Gino Tuccari (INAF-IRA & MPI)
Oral1: Advances in VGOS Stations and Technology: Part 2
- Gino Tuccari (INAF-IRA & MPI)
- Evgeny Nosov (Institute of Applied Astronomy of RAS (IAA RAS))
Oral1: Advances in VGOS Stations and Technology: Part 3
- Evgeny Nosov (Institute of Applied Astronomy of RAS (IAA RAS))
- Gino Tuccari (INAF-IRA & MPI)
Dr
Graham Appleby
(NERC Space Geodesy Facility, Herstmonceux, UK)
14/03/2016, 09:15
1: Advances in VGOS Stations and Technology
Oral Presentation
Satellite Laser Ranging (SLR) is used to measure accurately the distance from ground stations to retro-reflectors on satellites and on the Moon. SLR is one of the fundamental space geodetic techniques that define the International Terrestrial Reference Frame (ITRF), which is the basis upon which many aspects of global change over space, time, and evolving technology are measured; with VLBI the...
Dr
Mamoru Sekido
(National Institute of Information and Communications Technology)
14/03/2016, 09:40
1: Advances in VGOS Stations and Technology
Oral Presentation
We are developing a new broadband VLBI system, named GALA-V with aim of frequency comparison between atomic time standards over intercontinental distances. The development of broadband GALA-V system is coordinated to be as compatible as possible with the VGOS system. Kashima 34m antenna that had modified Cassegrain optics was enabled to carry out broadband observation with originally developed...
Axel Nothnagel
(Institute of Geodesy and Geoinformation, University of Bonn)
14/03/2016, 10:05
1: Advances in VGOS Stations and Technology
Oral Presentation
On October 7 and 8, 2015, the IVS Directing Board held an IVS Retreat at the Dominion Radio Astrophysical Observatory, Penticton, BC, Canada, to discuss current implications and future challenges of the IVS’s existence and operations. In order to benefit from outside views, six external advisors had been invited as well. The group spent two days discussing correlation, product lines,...
Dr
Gino Tuccari
(INAF-IRA and MPI)
14/03/2016, 10:20
1: Advances in VGOS Stations and Technology
Oral Presentation
Multi-band concurrent observation capability for the frequencies bands commonly
used in EVN greatly could improve the VLBI scientific opportunities, even enabling important simplification in the radiotelescope operations.
The project for a 1.5 - 15.5 GHz fully digital receiver is presented with the
possible solutions for a smooth introduction in the different from each other
EVN radiotelescopes.
Dr
richard Biancale
(CNES/GRGS)
14/03/2016, 10:35
1: Advances in VGOS Stations and Technology
Oral Presentation
It is known that the VLBI Global Observing System (VGOS) network suffers from a lack of implementation in the South Pacific area. It is why GRGS was considering setting up a VLBI antenna in Tahiti in cooperation with NASA.
There is an existing geodetic observatory (OGT) in the campus of the French Polynesian University (UPF) which was created in 1998 in a tripartite cooperation between UPF,...
Mr
Leif Morten Tangen
(Norwegian Mapping Authority)
14/03/2016, 11:15
1: Advances in VGOS Stations and Technology
Oral Presentation
The existing 20 m telescope in Ny-Ålesund was set in operation in 1994. The telescope is more than 20 years now and is ready for retirement.
We decided to build a VGOS core site with twin telescopes. The existing telescope is just 70 meters away from the runway and the CAA did not allow us to build anything more so close.
The new site is about 1500 meters northwest of the old telescope and...
Dr
Guangli Wang
(Shanghai Astronomical Observatory)
14/03/2016, 11:30
1: Advances in VGOS Stations and Technology
Oral Presentation
The Seshan VGOS station is now in building. It is a very-fast-slewing 13.2m antenna, with QRFH wideband feed, and a realtime 3D measurement system of reference point variation is planing to install. And it locates in the yard of Tianma 65m radio telescope. Its recent progress will be introduced in this report.
Dr
Arthur Niell
(MIT Haystack Observatory)
14/03/2016, 11:45
1: Advances in VGOS Stations and Technology
Oral Presentation
The GGAO 12m and Westford 18m antennas are instrumented with the broadband signal chain to provide VGOS capability. These antennas have been making VGOS geodetic observations for more than a year. Approximately seventeen one- to twenty-four-hour VGOS sessions were conducted in 2015 to develop and test many of the procedures needed for an operational program, including scheduling, unattended...
Dr
Chet Ruszczyk
(MIT Haystack Observatory)
14/03/2016, 12:00
1: Advances in VGOS Stations and Technology
Oral Presentation
The Kokee Park Geophysical Observatory's 12m is expected to see First
Light early 2016. A description of the integration and testing that
was performed at MIT Haystack Observatory before shipping
the signal chain is described. This is followed by a summary of the
teams work that had to occur before first light and the initial
results.
Beyond KPGO first light focuses on the...
Mr
Ganesan Rajagopalan
(MIT Haystack Observatory)
14/03/2016, 12:15
1: Advances in VGOS Stations and Technology
Oral Presentation
MIT Haystack Observatory, as part of the NASA Space Geodesy Program, is delivering the first VGOS-compliant Signal Chain to the Kokee Park Geophysical Observatory (KPGO), Hawaii, and will soon be integrating and commissioning the KPGO 12-m station.
We will describe the Signal Chain subsystems and highlight the design and performance of the cryogenically cooled frontend. This incorporates a...
Gerhard Kronschnabl
(Geodetic Observatory Wettzell)
14/03/2016, 12:30
1: Advances in VGOS Stations and Technology
Oral Presentation
The VGOS antenna Ws at Wettzell is equipped with an Elevenfeed, having a continuous frequency range from 2 GHz - 14 GHz. The receiving system with eight parallel intermediate frequency channels enables the use of four bands at different polarizations. A DBBC in combination with a FILA10G and a Mark6 System is used as backend. The presentation gives an overview about the current status of the...
Mr
Evgeny Nosov
(IAA RAS)
14/03/2016, 14:00
1: Advances in VGOS Stations and Technology
Oral Presentation
Broadband Acquisition System (BRAS) was designed to digitize wideband signals from receivers of radio telescopes, pack the digital samples into VDIF frames and transmit them through 10G Ethernet interface. The system has been installed in Badary and Zelenchukskaya observatories on the recently constructed 13-meters RT-13 radio telescopes in February–March 2015. Since November 2016, IAA RAS...
Dr
Tomoaki Oyama
(NAOJ)
14/03/2016, 14:15
1: Advances in VGOS Stations and Technology
Oral Presentation
The new VLBI observing system (OCTAVE-DAS) have been developed based on the VSI-H and VDIF specifications at NAOJ (National Astronomical Observatory of Japan). It consists of 1) a high speed 1-20 Gsps 3-10 bit RF direct ADC (OCTAD) enable us to acquire not only wide intermediate frequency but also radio frequency up to 50 GHz and have DBBC functions for VGOS (VLBI Global Observing System), 2)...
Mr
harro verkouter
(Joint Institute for VLBI ERIC, Dwingeloo)
14/03/2016, 14:30
1: Advances in VGOS Stations and Technology
Oral Presentation
Modern, VGOS and general purpose radio-astronomical digital back ends (DBEs), will produce enormous amounts of data, posing some challenges for the recorders. Fortunately, the availability of ever faster digital hardware has also meant that capturing these large data streams on - relatively speaking - general purpose hardware has become quite feasible.
Currently there are two models of...
