Results 51 to 60 of about 21,511,845 (71)

Impacto de una mejor distribución de estaciones en las sesiones de VLBI geodésico [PDF]

El Global Geodetic Observing System (GGOS) tiene por objetivo el monitoreo de los cambios globales del sistema terrestre. Dentro de éste, VLBI (Very Long Baseline Interferometry) juega un rol indiscutible, siendo la única técnica capaz no sólo de ...
Fernández, Laura Isabel, Gomez, María Eugenia   +1 more
core  

Scheduling for VGOS Twin-Telescopes

, 2016
The technique of Very Long Baseline Interferometry (VLBI) allows the estimation of all five Earth Orientation Parameters (EOP), the International Celestial Reference Frame (ICRF) and it is a primary contributor to the International Terrestrial Reference ...
Gnilsen, Paul
core  

Effects of source structure in legacy and broadband geodetic VLBI

Very Long Baseline Interferometry (VLBI) is critical for the realisation of global geodetic reference frames. The new VLBI system (VLBI Geodetic Observing System; VGOS) is designed with the primary goal of filling the gap between the current accuracy of ...
Simin Salarpour (14748610)
core   +1 more source

Combining legacy S/X and broadband VGOS VLBI networks by mixed-mode observations

American Geophysical Union Meeting (AGU23), 11-15 December 2023, San FranciscoA network of VLBI stations has been observing in the legacy S/X frequency bands for more than 40 years.
Cappallo, Roger J., Niell, Arthur E., Ruszczyk, Chester A., Corey, Brian E., Titus, Michael A., Elosegui, Pedro, Barrett, John, Hoak, Dan, Mondal, Dhiman   +8 more
core  

A celestial reference frame derived from observations with the Very Long Baseline Interferometry Global Observing System

Aims. We computed a celestial reference frame (CRF) from Very Long Baseline Interferometry (VLBI) Global Observing System (VGOS) data after five years of regular observations carried out under the umbrella of the International VLBI Service for Geodesy ...
Charlot, P.; orcid:, Jacobs, C. S.; orcid:, Krásná, Hana; orcid:, Schartner, M.; orcid:   +3 more
core   +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  

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5 Year Technology Roadmap for VLBI Global Observing System (VGOS)

IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019
A Technology Development, Infusion, and an interleaved joint cal/val opportunity plan is described for the VLBI GLOBAL OBSERVING SYSTEM (VGOS), and Earth Science satellite missions that measure water vapor such as Global Precipitation Measurement (GPM) Core Observatory that covers the Earth from 65°S to 65°N.
Lawrence M. Hilliard, Leonid Petrov, Frank LeMoine, Ganesh Rajagopalan, Pedro Elosegui, Chester Ruszczyk, John Gipson, David Horsley 0002, Gary Brown   +8 more
openaire   +4 more sources

Bridging astronomical, astrometric and geodetic scheduling for VGOS

Journal of Geodesy, 2023
Funding Information: This research has made use of VGOS schedule files provided by the International VLBI Service for Geodesy and Astrometry (IVS) data archives.
Matthias Schartner, Ming Hui Xu, Benedikt Soja   +2 more
exaly   +2 more sources

A broadband VLBI system using transportable stations for geodesy and metrology: an alternative approach to the VGOS concept [PDF]

Journal of Geodesy, 2021
International audienceWe have developed a broadband VLBI (very long baseline interferometry) system inspired by the concept of the VLBI Global Observing System (VGOS).
Hidekazu Hachisu, Monia Negusini, Davide Calonico   +2 more
exaly   +2 more sources

Evaluations of the geodetic parameters derived from VLBI Global Observing System (VGOS)

2023
In the past few years, the VLBI Global Observing System (VGOS) has been established with the objective of improving the data from VLBI in order to meet the increasingly demanding requirements regarding the rotation of the Earth and the reference frame determination.
Hellmers, H., Modiri, S., Thaller, D., Bloßfeld, M.   +3 more
openaire   +2 more sources