Results 91 to 100 of about 822 (179)

VSOP Space VLBI and Geodetic VLBI Investigations of Southern Hemisphere Radio Sources

The Astrophysical Journal Supplement Series, 2002
Abstract not available.
Tingay, Steven J., Reynolds, John E., Tzioumis, Anastasios K., Jauncey, David L., Lovell, James E., Dodson, R. G., Costa, M. E., McCulloch, Peter M., Edwards, Philip G., Hirabayashi, Hisashi, Murphy, David W., Preston, Robert A., Piner, B. Glenn, Nicolson, G. D., Quick, J. F. H., Kobayashi, Hideyuki, Shibata, Kazunari M.   +16 more
openaire   +2 more sources

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

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

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

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

On the Integration of VLBI Observations to GENESIS into Global VGOS Operations

Remote Sensing
The upcoming European Space Agency (ESA) satellite mission GENESIS is an Earth-orbiting satellite carrying instruments of all four space geodetic techniques.
David Schunck, Lucia McCallum, Guifré Molera Calvés   +2 more
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

The future of VLBI

, 2013
Appearing in the proceedings of the RTS 2012 conference (Resolving The Sky - Radio Interferometry: Past, Present and Future), April 17-20, 2012, Manchester (UK). Proceedings of Science, PoS(RTS2012)048.
openaire   +2 more sources

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