Results 101 to 110 of about 9,054 (229)

Effects of Earth’s Oblateness on Black Hole Imaging through Earth–Space and Space–Space Very Long Baseline Interferometry

The Astrophysical Journal
Earth-based very long baseline interferometry (VLBI) has made rapid advances in imaging black holes. However, due to the limitations imposed on terrestrial VLBI by the Earth’s finite size and turbulent atmosphere, it is imperative to have a space-based ...
Aditya Tamar, Ben Hudson, Daniel C. M. Palumbo   +2 more
doaj   +1 more source

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

Solving the polarization problem in ALMA-VLBI observations [Elektronisk resurs]

, 2014
The Atacama Large mm-submm Array (ALMA) is, by far, the most sensitive mm/submm telescope in the World. The ALMA Phasing Project (APP) will allow us to phase-up all the ALMA antennas and use them as one single VLBI station.
Roy, A.,, Zensus, A.J.,, Conway, John,, Lindqvist, Michael,, Alef, W.,, Marti-Vidal, Ivan,   +5 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

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

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

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

DBBC3 — The new wide-band backend for VLBI

, 2018
The DBBC3 VLBI digital backend is the successor of the most widely adapted digital VLBI backend DBBC2. The DBBC3 offers much wider bandwidth and integrated Ethernet output.
Wunderlich, M.,, Tuccari, Gino,, Johansson, Karl-Åke L,, Alef, Walter,, Wagner, Jan,, Roy, A.,, Haas, Rüdiger,, Rottmann, H.,, Dornbusch, S.,   +8 more
core  

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