Results 41 to 50 of about 349 (100)

The impact of the AuScope VLBI observations and the regional AUSTRAL sessions on the TRF [PDF]

open access: yes, 2014
The AuScope VLBI array was built with the purpose to improve the terrestrial (TRF) and celestial reference frames in the southern hemisphere. Since 2010 the three 12-m antennas in Hobart (Tasmania), Katherine (Northern Territory) and Yarragadee (Western ...
Plank, L, weston, S
core  

Observations of Artificial Radio Sources within the Framework of Geodetic Very Long Baseline Interferometry [PDF]

open access: yes, 2020
Very long baseline interferometry (VLBI) is a mature and fascinating technique with unique and indisputable applications in radio astronomy, planetary sciences, and space geodesy. The latter discipline is a field of science facilitating our understanding
Klopotek, Grzegorz
core  

Gravitational deformation of ring-focus antennas for VGOS: first investigations at the Onsala twin telescopes project [PDF]

open access: yes, 2019
The receiving properties of radio telescopes used in geodetic and astrometric very long baseline interferometry (VLBI) depend on the surface quality and stability of the main reflector.
Eschelbach, Cornelia   +3 more
core   +1 more source

How to register a VGOS radio telescope at ITU and why it is important [PDF]

open access: yes, 2016
VGOS radio telescopes enable observations in the range of 2-14 GHz and are much more receptive for unwanted radio frequency interference. Some space-borne transmitters may cause detrimental radiation to VGOS receivers.
Corey, Brian   +2 more
core  

The impacts of source structure on geodetic parameters demonstrated by the radio source 3C371

open access: yes, 2017
Closure quantities measured by very long baseline interferometry (VLBI) observations are independent of instrumental and propagation instabilities and antenna gain factors, but are sensitive to source structure.
Anderson, James M.   +6 more
core   +1 more source

Evaluating the potential of Indian stations in augmenting the UT1−UTC precision of VGOS Intensive sessions

open access: yesEarth, Planets and Space
Irregularities in the Earth’s rotation speed are quantified by the difference between Universal Time (UT1) and Coordinated Universal Time (UTC).
Arnab Laha   +6 more
doaj   +1 more source

Canadian VLBI Technology Development Center [PDF]

open access: yes
The Canadian VLBI Technology Development Center (TDC) is involved in activities related to the realization of the VLBI2010 Global Observing System (VGOS)
Petrachenko, Bill
core   +1 more source

Current Status of the EU-VGOS Project [PDF]

open access: yes, 2023
The EU-VGOS project began in 2018 with\ua0the aim of using the VGOS infrastructure in Europe\ua0to investigate methods for VGOS data processing. The\ua0project is now structured into Working Groups dealing\ua0with operations (stations), e-transfer ...
Albentosa, Ezequiel   +38 more
core  

International VLBI Service for Geodesy and Astrometry 2014 Annual Report [PDF]

open access: yes
IVS is an international collaboration of organizations which operate or support Very Long Baseline Interferometry (VLBI) components. The goals are: 1.
Armstrong, Kyla L.   +2 more
core   +1 more source

VGOS VLBI Intensives between MACGO12M and WETTZ13S for the rapid determination of UT1-UTC

open access: yes, 2023
In this work, we present a status update and results of the designated research and development VLBI Intensive program VGOS-INT-S, observed between MACGO12M and WETTZ13S for the rapid determination of the Earth's phase of rotation, expressed via UT1-UTC.
Lemoine, Frank G.   +5 more
core  

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