Results 141 to 150 of about 2,072 (163)

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 Frame (ITRF), in particular with information about its scale.
openaire   +1 more source

VGOS observing strategy for 202

The VLBI Global Observing System (VGOS) entered operational service in 2020 with a small, northern-hemisphere-dominated network and a modest observing cadence constrained primarily by correlator capacity, data transport, and storage limitations. Since then, the network has continued to expand steadily.
Matthias Schartner, Lucia McCallum, Benedikt Soja   +2 more
openaire   +1 more source

Measurement of Cross-Polarization Gains of VGOS Antennas

2023
VGOS antennas observe in dual linear polarization mode. To obtain the maximum signal-to-noise ratio, the correlator visibilities have to be combined to Stokes I for fringe-fitting. For this processing step it is essential to calibrate the complex gain differences between the two linear feeds of each antenna.
openaire   +2 more sources

Imaging VGOS Observations and Investigating Source Structure Effects

Journal of Geophysical Research: Solid Earth, 2021
Harald Schuh, Tuomas Savolainen, Ming Hui Xu   +2 more
exaly  

An Overview of Shanghai VGOS Wideband VLBI System

2019 IEEE 11th International Conference on Communication Software and Networks (ICCSN), 2019
The demand for higher precision measurements in Very Long Baseline Interferometry (VLBI) continues to grow, which drives the technical development of next generation international VLBI stations called the VLBI Global Observing System (VGOS). The Shanghai VGOS station is located in the courtyard of existing 65m radio telescope, which is 13.2 m diameter,
Zheng Xiong Sun, Jin Qing Wang, Guang Li Wang   +2 more
exaly   +2 more sources

Microwave radiometer observations for VGOS data processing

Since mid 2023, the Onsala Space Observatory is operating a new modern microwave radiometer, Greta, which is a commercial product of type HATPRO-G5. It is co-located with the other microwave radiometer, Konrad, which has been developed and built at Onsala.
Rüdiger Haas, Peng Feng, Gunnar Elgered
openaire   +1 more source

Fitting of VGOS Data for Astrogeodesy

Source structure modelling of VLBI globalobserving system (VGOS) observations is one of themain interests for Astrogeodesy, a project combiningthe knowledge from geodesy, astrometry and radio as-tronomy. We report our research on the calibration of aVGOS dataset using astronomical data reduction soft-ware.
Chamani, W. ; https://orcid.org/0000-0001-7350-4152, Xu, M. ; https://orcid.org/0000-0001-9602-9489   +1 more
openaire   +1 more source

VGOS CONT17: Comparison of VGOS results with S/X and GPS

2018
Bolotin, Sergei, Baver, Karen, Gipson, John, Gordon, David, Himwich, William, Macmillan, Daniel, Elósegui, Pedro, Barrett, John, Corey, Brian, Niell, Arthur, Ruszczyk, Chester, Titus, Michael, Neidhart, Alexander, De Vicente, Pablo, Wakasugi, Takahiro   +14 more
openaire   +1 more source

Assessing tropospheric turbulence impact on VGOS telescope placement in the Indian subcontinent for the estimation of earth orientation parameters

Journal of Geodesy
A. Laha, J. Böhm, S. Böhm, M. Schartner, H. Krásná, Nagarajan Balasubramanian, O. Dikshit   +6 more
semanticscholar   +1 more source

Evaluation of VGOS and Legacy S/X VLBI Observations with Non-Tidal Loading Corrections

Advances in Space Research
Shivangi Singh, J. Böhm, H. Krásná, Nagarajan Balasubramanian, O. Dikshit   +4 more
semanticscholar   +1 more source