Results 21 to 30 of about 758 (152)

The EUropean-VGOS Project [PDF]

, 2019
In Spring 2018 the Bonn correlation centre\ua0started a collaboration with the three European stations\ua0of Wettzell, Onsala and Yebes, equipped with\ua0both S/X- and broadband systems, to perform VGOS-like test sessions.
Alef, W., Anderson, J., Bernhart, S., de Vicente, P., González García, J., Haas, R., La Porta, L., Martí Vidal, I., Müskens, A., Nothnagel, A., Plötz, C., Rottmann, H., Savolainen, T., Schüler, T., Small, D., Wagner, J.   +15 more
openaire   +3 more sources

Current Status of the EU-VGOS Project [PDF]

, 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, Alef, Walter, Bernhardt, Simone, Böhm, Johannes, Bolano Gonzalez, Ruben, Choi, Yoon, Gansmoe, Thomas, Garcia Espada, Susana, Garcia Niro, Cristina, Girdiuk, Anastasiia, Gonzalz Garcia, Javier, Groøslie Wennesland, Ann Silje, Gruber, Jakob, Haas, Rüdiger, Hammargren, Roger, Heinkelmann, Robert, Jaron, Frédéric, Kareinen, Niko Petteri, Kirkvik, Ann-Silje, Krasna, Hana   +20 more
core   +5 more sources

Initial Results Obtained with the First TWIN VLBI Radio Telescope at the Geodetic Observatory Wettzell [PDF]

Sensors, 2015
Geodetic Very Long Baseline Interferometry (VLBI) uses radio telescopes as sensor networks to determine Earth orientation parameters and baseline vectors between the telescopes.
Torben Schüler, Gerhard Kronschnabl, Christian Plötz, Alexander Neidhardt, Alessandra Bertarini, Simone Bernhart, Laura la Porta, Sebastian Halsig, Axel Nothnagel   +8 more
doaj   +2 more sources

Geodetic data analysis of VGOS experiments

2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS), 2021
Very Long Baseline Interferometry (VLBI) serves as one of the common geodetic methods to define the global reference frames and monitor Earth's orientation variations. The technical upgrade of the VLBI method known as the VLBI Global Observing System (VGOS) includes a critical re-design of the observed frequencies from the dual band mode (S and X band,
Alef, W., Andalsvik, Y., Anderson, J., Bernhart, S., Böhm, J., Boumann, J., Choi, Y., Colomer, F., Engelhardt, G., Flohrer, C., Girdiuk, A., Gonzalez, J., Gruber, J., Haas, R., Hammargren, R., Hohlneicher, M., Jaron, F., Jenie, O., Kareinen, N., LØvhØiden, L., Martinez, E., Marti-Vidal, I., Melnikov, A., Mueskens, A., Neidhardt, A., Nothnagel, A., Petrov, L., Plötz, C., Rottmann, H., Savolainen, T., Schartner, M., Schuh, H. ; https://orcid.org/0000-0001-5443-0370, Schueler, T., Small, D., Szomoru, A., Thaller, D., Ullrich, D., Varenius, E., Verkouter, H., De Vicente, P., Wagner, J., Xu, M. ; https://orcid.org/0000-0001-9602-9489, Zubko, N.   +42 more
openaire   +3 more sources

Optimizing VGOS observations using an SNR-based scheduling approach [PDF]

Earth, Planets and Space
The geodetic and astrometric very long baseline interferometry (VLBI) community is in the process of upgrading its existing infrastructure with the VLBI Global Observing System (VGOS). The primary objective of VGOS is to substantially boost the number of
Matthias Schartner, Bill Petrachenko, Mike Titus, Hana Krásná, John Barrett, Dan Hoak, Dhiman Mondal, Ming Hui Xu, Benedikt Soja   +8 more
doaj   +5 more sources

An assessment of the accuracy of the VGOS geodetic products

, 2021
American Geophysical Union (AGU) Fall Meeting, 13-17 December 2021, New ...
Mondal, Dhiman, Elosegui, Pedro, Barrett, John, Corey, Brian E., Niell, Arthur E., Ruszczyk, Chester A., Titus, Michael A., Behrend, Dirk, Bolotin, Sergei, Gipson, John M., Macmillan, Daniel S.   +10 more
openaire   +3 more sources

Imaging VGOS observations and investigating source structure effects [PDF]

Journal of Geophysical Research: Solid Earth, 2020
The next-generation, broadband geodetic very-long-baseline interferometry system, named VGOS, is being developed globally with an aim to achieve 1~mm accuracy for station positions. Currently, the systematic errors in VGOS observations are still about one order-of-magnitude larger than this aim. In this study, we demonstrate that it is feasible to make
Xu, Ming H., Savolainen, Tuomas, Zubko, Nataliya, Poutanen, Markku, Lunz, Susanne, Schuh, Harald, Wang, Guang, L.   +7 more
openaire   +6 more sources

Large Satellite Constellations and Their Potential Impact on VGOS Operations [PDF]

, 2023
Large LEO satellite constellations (or so-called Mega-constellations) will significantly change the view of the sky in some radio frequency bands. For VGOS telescopes it is important to understand the potential impact these constellations will have in their operations, what is the risk of its receivers going into non-linear behaviour and how much ...
F. Di Vruno, V. Tornatore
openaire   +4 more sources

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   +2 more sources

Review of Operational VGOS Sessions in 2020

, 2022
25th European VLBI Group for Geodesy and Astronomy Working Meeting, 14-18 March ...
Gipson, John M., Bolotin, Sergei, Baver, K., Behrend, Dirk, Lemoine, Frank G., Elosegui, Pedro, Ruszczyk, Chester A.   +6 more
openaire   +2 more sources