Results 111 to 120 of about 9,059 (229)

European 4 Gbps VLBI and e-VLBI [PDF]

Proceedings of The 8th International e-VLBI Workshop — PoS(EXPReS09), 2009
Guifré Molera Calvés, Jan Wagner, Jouko Ritakari, Ari Mujunen   +3 more
openaire   +1 more source

The latest results from the global mm VLBI array [Elektronisk resurs] [PDF]

, 2012
The Global mm-VLBI Array (GMVA) is the highest angular resolution imaging interferometer currently available as a common user facility. It is capable of angular resolutions on the order of 40 microarcseconds.
Bremer, M.,, Jorstad, S.,, Zensus, A.J.,, Hodgson, J.,, Krichbaum, T.P.,, Lindqvist, Michael,, Marscher, A.,, Marti-Vidal, Ivan,, de Vicente, P.,   +8 more
core  

Optimal distribution of VLBI transmitters in the Galileo space segment for frame ties. [PDF]

Earth Planets Space, 2023
Wolf H, Böhm J.
europepmc   +1 more source

e-VLBI Technology in VLBI Network "Quasar" [PDF]

Proceedings of The 8th International e-VLBI Workshop — PoS(EXPReS09), 2009
Alexandre Salnikov, Andrey Finkelstein, Alexander Ipatov, Michael Kaidanovsky, Ilia Bezrukov, Andrey Mikhailov, Igor Surkis, Elena Skurikhina   +7 more
openaire   +1 more source

DBBC3: VLBI at 32 Gbits per second [Elektronisk resurs] [PDF]

, 2012
The project to develop the third generation of a digital backend system (DBBC3) for VLBI and other applications is presented, including an overview of the evolution of this system.
Wunderlich, M.,, Graham, D.,, Casey, Simon,, Tuccari, G.,, Roy, A.,, Bertarini, A.,, Wagner, J,,, Buttaccio, S.,, Alef, W.,, Lindqvist, Michael,, Comoretto, G.,   +10 more
core  

Enhanced Stochastic Models for VLBI Invariant Point Estimation and Axis Offset Analysis

Remote Sensing
The accuracy and stability of Very Long Baseline Interferometry (VLBI) systems are essential for maintaining global geodetic reference frames such as the International Terrestrial Reference Frame (ITRF). This study focuses on the precise determination of
Chang-Ki Hong, Tae-Suk Bae
doaj   +1 more source

Monitoring of multi-frequency polarization of gamma-ray bright AGNs

EPJ Web of Conferences, 2013
We started two observing programs with the Korean VLBI Network (KVN) monitoring changes in the flux density and polarization of relativistic jets in gamma-ray bright AGNs simultaneously at 22, 43, 86, 129 GHz.
Lee Sang-Sung, Han Myounghee, Kang Sincheol, Seen Jungmin, Byun Do-Young, Baek Jun-Hyun, Kim Soon-Wook, Kim Jeong-Sook   +7 more
doaj   +1 more source

Comparing remote atomic clocks via VLBI networks and fiber optic links: the LIFT/MetGeSp perspective [PDF]

, 2018
Very Long Baseline Interferometry experiments require an extremely precise synchronization between the atomic clocks keeping the time and frequency standards at radiotelescope observatories.
Nanni, M., Clivati, C., BORTOLOTTI, CLAUDIO, Tampellini, A., KRAVCHENKO, EVGENIYA, RICCI, ROBERTO, MACCAFERRI, GIUSEPPE, Levi, F., ROMA, MAURO, Ambrosini, R., NEGUSINI, MONIA, Siciliani de Cumis, M., MURA, Alessandro, STAGNI, Matteo, Santamaria Amato, L., Calonico, D., Bianco, G., PERINI, FEDERICO   +17 more
core   +1 more source

Geodetic Italian VLBI: first tests [PDF]

, 2015
First experiments of the Italian VLBI network (VITA) correlated in Bologna have involved the Medicina, Noto and Matera antennas. Although the scientific validity of these tests are yet to be proven, these experiments have served as a benchmark to ...
NEGUSINI, MONIA, STAGNI, Matteo
core  

Prospects of Detecting a Jet in Sagittarius A* with Very-long-baseline Interferometry

The Astrophysical Journal
Event Horizon Telescope (EHT) images of the horizon-scale emission around the Galactic center supermassive black hole Sagittarius A* (Sgr A*) favor accretion flow models with a jet component. However, this jet has not been conclusively detected.
Erandi Chavez, Sara Issaoun, Michael D. Johnson, Paul Tiede, Christian Fromm, Yosuke Mizuno   +5 more
doaj   +1 more source