Results 31 to 40 of about 758 (152)

Current Status of the EU-VGOS Project [PDF]

, 2022
The EU-VGOS project began in 2018 with the aim of using the VGOS infrastructure in Europe to investigate methods for VGOS data processing. The project is now structured into Working Groups dealing with operations (stations), e-transfer, correlation and ...
Xu, Ming H., Bernhart, Simone, Melnikov, Alexey, Porcas, Richard, Krasna, Hana; orcid:, Rottmann, Helge, Gansmoe, Thomas, Panzenböck, Olivia, Meldahl, Axel, Haas, Rüdiger; orcid:, Kareinen, Niko, Perez Victor, Marti-Vidal, Ivan, Zubko, Nataliya, Martinez, Elena, Small, Des, Kettenis, Mark, Hammargren, Roger, Modiri, Sadegh, Ezequiel Albentosa, Gonzalez Garcia, Javier, Böhm, Johannes; orcid:, Girdiuk, Anastasiia, Nothnagel, Axel Gerhard, Schuh, Harald, Petrov, Leonid, Schüler, Torben, Bolano Gonzales, Ruben, Neidhardt, Alexander, Gruber, Jakob Franz; orcid:, Plötz, Christian, Matsumoto, Saho, Alef, Walter, Garcia Miro, Cristina, Kirkvik, Ann-Silje, Wagner, Jan, Savolainen, Tuomas, Choi, Yoon Kyung, Soja, Benedikt; orcid:, Varenius, Eskil, De Vicente, Pablo, Garcia Espada, Susana, Jaron, Frederic Felix Daniel, Groøslie Wennesland, Silje A., Heinkelmann, Robert, Schartner, Matthias; orcid:, Verkouter, Marjolein; orcid:   +46 more
core   +5 more sources

VGOS: The Becoming of an Operational System

Peer ...
Behrend, Dirk, Ruszczyk, Chester A., Elosegui, Pedro, Neidhardt, Alexander   +3 more
openaire   +2 more sources

Unconstrained Estimation of VLBI Global Observing System Station Coordinates [PDF]

Advances in Geosciences, 2021
The International VLBI Service for Geodesy and Astrometry (IVS) is currently setting up a network of smaller and thus faster radio telescopes observing at broader bandwidths for improved determination of geodetic parameters. However, this new VLBI Global
M. Mikschi, J. Böhm, M. Schartner, M. Schartner   +3 more
doaj   +1 more source

VGOS Source Selection Criteria

, 2016
Source structure has long been recognized as a significant risk factor for the broadband method. The issue of greatest concern is that structure related phases and delays will lead to cycle slips during broadband phase connection. These errors are subtle to detect and difficult or impossible to correct after the fact.
Petrachenko, Bill, Charlot, P., Collioud, A., Searle, Anthony   +3 more
core   +4 more sources

The Compatibility of DORIS with VGOS

, 2023
In global geodesy co-location of geodetic space techniques are required for mutual control of the measurements. The ground-based active transmitters of the DORIS system are in conflict to VLBI-observations. The VLBI systems are designed to receive extremely faint cosmic signals down to -110 dBm , whereas the DORIS beacon emits signals at a frequency of
Bautista-Duran, Marta, Ferreira, Joao, Garcia, Susana, Hase, Hayo, Kallunki, Juha, Lindqvist, Michael, Madkour, Waleed, Probst, Willi, Tangen, Leif-Morten, Tornatore, Vincenza, Winkel, Benjamin   +10 more
openaire   +3 more sources

Evaluation of the first three years of Vgos 24 h sessions using a Kalman filter with C5++

Earth, Planets and Space, 2023
We analyzed the first three years of VGOS 24 h sessions, and evaluated the performance in terms of Earth orientation parameters (EOP) and station positions.
Periklis-Konstantinos Diamantidis, Rüdiger Haas   +1 more
doaj   +1 more source

Empirical Models to Characterize the Structural and Physiochemical Properties of Vacuum Gas Oils with Different Saturate Contents

Resources, 2021
Inter-criteria analysis was employed in VGO samples having a saturate content between 0.8 and 93.1 wt.% to define the statistically significant relations between physicochemical properties, empirical structural models and vacuum gas oil compositional ...
Dicho S. Stratiev, Ivelina K. Shishkova, Rosen K. Dinkov, Ivan P. Petrov, Iliyan V. Kolev, Dobromir Yordanov, Sotir Sotirov, Evdokia Sotirova, Vassia Atanassova, Simeon Ribagin, Krassimir Atanassov, Danail D. Stratiev, Svetoslav Nenov, Liliana Todorova-Yankova, Kamen Zlatanov   +14 more
doaj   +1 more source

Intracrystalline mesoporosity over Y zeolites. Processing of VGO and resid-VGO mixtures in FCC [PDF]

Catalysis Today, 2017
Abstract Prototypes of FCC catalysts containing 30%wt. Y zeolite with different intracrystalline mesoporosity generated by alkaline desilication, on an inert silica matrix, were tested in cracking a conventional vacuum gasoil (VGO) feedstock, alone and mixed with an atmospheric tower residue (ATR).
García, Juan Rafael, Falco, Marisa Guadalupe, Sedran, Ulises Anselmo   +2 more
openaire   +2 more sources

VGOS Intensives Ishioka-Onsala [PDF]

, 2021
<p>The VLBI Global Observing System (VGOS) is the VLBI contribution to GGOS. During the last years, several VGOS stations have been established, the VGOS observation program has started, and by 2021 VGOS has achieved an operational state involving nine international VGOS stations. Further VGOS stations are ...
Rüdiger Haas, Eskil Varenius, Periklis-Konstantinos Diamantidis, Saho Matsumotu, Matthias Schartner, Tobias Nilsson   +5 more
openaire   +2 more sources

EU-VGOS activities in Vienna

, 2021
The EU-VGOS collaboration carries out observational sessions with a network of European VGOS antennas on a regular basis. Part of these experiments are correlated at TU Wien.
Bernhart, Simone, Gonzalez Garcia, Javier, Schartner, Matthias, Böhm, Johannes, Wagner, Jan, Gruber, Jakob, Marti-Vidal, Ivan, Choi, Yoon Kyung, Jaron, Frederic, Varenius, Eskil, Soja, Benedikt   +10 more
core   +2 more sources