| Preface |
| |
Dirk Behrend et al. |
Preface |
| Session 1. Technical Developments at the Stations |
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Rolf Dach |
Dependency of Satellite Geodesy on UT1-UTC from VLBI |
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Francisco Colomer |
The Global VLBI Alliance |
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Juha Kallunki et al. |
Spectrum Management for the VLBI Global Observing System (VGOS) Observations |
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Federico Di Vruno and Vincenza Tornatore |
Large Satellite Constellations and Their Potential Impact on VGOS Operations |
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Dirk Behrend et al. |
Status of the VGOS Infrastructure Rollout |
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Susana Garcia-Espada et al. |
Status at Ny-Ålesund Geodetic Earth Observatory |
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Dmitry Ivanov et al. |
Russian New Generation VLBI Network |
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João Salmim Ferreira et al. |
RAEGE Santa Maria: Station Overview |
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José Antonio López-Pérez et al. |
Description of RAEGE Yebes VGOS Receiver Upgrades |
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Nattaporn Thoonsaengngam et al. |
VGOS Station in the South of Thailand |
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Saho Matsumoto et al. |
Status of the Ishioka VLBI Station for the Past Two Years |
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Alexander Neidhardt et al. |
IVS Seamless Auxiliary Data Archive (SADA) and EVN Monitor |
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Sergey Serzhanov et al. |
Modernization of the Subreflector Surface of the RT-32 Radio Telescopes |
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Ulla Kallio et al. |
An Agile Method to Detect Deformations of the VLBI Dish |
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Hideki Ujihara |
Development of Wideband Antennas |
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Gino Tuccari et al. |
From BRAND to DBBC4 |
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Evgeny Nosov et al. |
Using the Multifunctional Digital Backend System on Radio Telescopes of Svetloe Observatory |
| Session 2. Observations, Operation and Correlation |
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Ezequiel Albentosa et al. |
Current Status of the EU-VGOS Project |
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Ahmad Jaradat et al. |
The Australian VGOS Observing Program |
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Javier González et al. |
The Yebes Observatory and the Future VLBI Correlator for the RAEGE Network |
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Tiege McCarthy et al. |
Australian VLBI Correlation Center |
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Yoon Kyung Choi et al. |
Bonn Correlator Status |
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Christian Plötz et al. |
VLBI Correlator Wettzell -- A New IVS Component |
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Lim Chin Chuan et al. |
Monitoring Source Flux Density and Antenna Sensitivity with Improved Feedback for the AUSTRAL VLBI Sessions |
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Mario Bérubé et al. |
Improving IVS Communication through a VLBI Communications Center |
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Jim Lovell and Darryl Lakins |
Towards Automating Operations of SGP VGOS Stations |
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Hayo Hase |
Alternative Frequency Setups for VGOS |
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Bill Petrachenko et al. |
VGOS Technology R\&D Sessions |
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Rebekka Handirk et al. |
Obtaining Local-Tie Vectors from Short-Baseline Interferometry |
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Takaaki Jike et al. |
Quality Assessment of the Mizusawa Software and GPU Correlators |
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Yuriy Vekshin et al. |
Optimal Signal Averaging Time in VLBI Sessions |
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Anastasiia Girdiuk et al. |
IVS Data Center at BKG |
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Taylor Yates et al. |
VLBI Data Ingest Improvements at NASA CDDIS |
| Session 3. Data Structures, Scheduling and Analysis Strategies |
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Sergei Bolotin et al. |
Automatic Processing of INT Sessions with nuSolve |
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Marina Gribanova and Elena Skurikhina |
The Application of the Rapid Data Observations of The Quasar VLBI Network in Order to Improve the Accuracy of the Universal Time Prediction |
| |
Lisa Kern et al. |
Impact of the Source Selection and Scheduling Optimization on the Estimation of UT1-UTC in VLBI Intensive Sessions |
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Dhiman Mondal et al. |
Quality Assessment of UT1-UTC (dUT1) Estimates Using VGOS Observations |
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John Gipson et al. |
Evaluation of KOKEE12M-WETTZ13S VGOS Intensives |
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Karen Baver et al. |
The First Year of KOKEE12M-WETTZ13S VGOS Intensive Scheduling: Status and Efforts Towards Improvement |
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Matthias Glomsda et al. |
Comparison of Simultaneous VGOS and Legacy VLBI Sessions |
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Tobias Nilsson et al. |
The Current and Future Performance of VGOS |
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Esther Azcue et al. |
Analysis of VGOS Sessions: Evaluation of Performance with Different Software |
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Sujata Dhar et al. |
Determining Favorable Locations for VGOS Establishment in India |
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Glenda Coetzer et al. |
Digital Object Identifiers for the IVS |
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Arnaud Collioud et al. |
Exploring Source Structure with the Bordeaux VLBI Image Database |
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Axel Nothnagel et al. |
First Results of Project on Six-hourly EOP Piecewise Linear Offset Parameterization |
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Matthias Schartner et al. |
VieSched++: Recent Developments and Lessons Learned from Two Years of Fully Automated Scheduling |
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Sara Hardin |
A Comparison of VieSched++ Simulations with Observed VLBI Sessions |
| Session 4. Interpretation of VLBI Results in Geophysics, Geodesy and Astrometry |
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Zuheir Altamimi et al. |
ITRF2020 and the IVS Contribution |
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Hendrik Hellmers et al. |
Scale Evaluation of the ITRF2020 Solution |
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Anastasiia Girdiuk et al. |
Changing from ITRF2014 to ITRF2020 in the Routine VLBI Analysis: First Investigations |
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Rüdiger Haas et al. |
Assessment of Parameters Describing the Signal Delay in the Neutral Atmosphere Derived from VGOS Observations |
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Christopher Dieck and Megan Johnson |
A New Wiggle in the Wobble? Uncovering Periodic Signals in Intensive Series |
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José M. Ferrándiz et al. |
On the Prospects of Explaining and Modeling with Higher Accuracy the Precession-nutation from VLBI Solutions |
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David Gordon et al. |
Current CRF Status at X/S and K Bands |
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Phil Cigan et al. |
Three Years of ICRF3 Source Positions |
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Lucas R. Hunt et al. |
Comparing Images of ICRF Sources at X-, K-, and Q-band |
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Sébastien Lambert et al. |
Parsec-scale Jets in AGN: Insights into the Location of the Gamma-Ray Emission from Geodetic VLBI, Gaia EDR3, and Fermi-LAT |
| Session 5. Extending the Use of VLBI to Frame Ties, Deep Space Exploration and Other Areas |
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David Schunck and Lucia McCallum |
Observing GPS Satellite Signals in L-Band with a Realistic Global VLBI Network: A Simulation Study |
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Helene Wolf et al. |
Adjustment of Galileo Satellite Orbits with VLBI Observations: A Simulation Study |
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Aletha de Witt et al. |
Sources with Significant Astrometric Offsets Between the S/X and K-band Celestial Frames |
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Niu Liu et al. |
Evaluate the ICRF3 Axes' Stability via Extragalactic Source Position Time Series |
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David Gordon et al. |
ICRF3 Position and Proper Motion of Sagittarius A* from VLBA Absolute Astrometry |
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Ming Hui Xu et al. |
Astrometric Positions of Gravitational Lensed System 1422+231 |