Results 121 to 130 of about 758 (152)
Bridging Astronomical, Astrometric and Geodetic Scheduling for VGOS
Journal of Geodesy, 2023 AbstractVery Long Baseline Interferometry (VLBI) experiments are organized within the geodetic, astrometric and astronomical communities for different applications, requiring different observation strategies adopted in scheduling. Currently, the next-generation geodetic and astrometric VLBI Global Observing System (VGOS) is being established.
Matthias Schartner +2 more
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VGO from shale oil. FCC processability and co-processing with conventional VGO
Fuel, 2022Fil: Fals, Jayson.
García, Juan Rafael +3 more
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VGOS VLBI Intensives Between macgo12m and wettz13s for the Rapid Determination of UT1-UTC [PDF]
International Association of Geodesy Symposia, 2023 In this work, we present a status update and results of the designated research and development VLBI Intensive program VGOS-INT-S, observed between MACGO12M and WETTZ13S for the rapid determination of the Earth's phase of rotation, expressed via UT1-UTC.
Matthias Schartner +2 more
exaly +2 more sources
Effect of Hydrotreating on Catalytic Cracking of a VGO
Energy & Fuels, 1996The effect of hydrotreating of a vacuum gas oil (VGO) feed on the activity, product composition, and quality in a microactivity test (MAT) has been studied.
Ivar M. Dahl +3 more
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Mathematical Modeling of a VGO Hydrotreating Reactor
SPE Latin American and Caribbean Petroleum Engineering Conference, 2001Abstract This paper presents a mathematical model developed for the operating simulation of a trickle-bed reactor. Furthermore, the model has been fixed to emulate the operation of the three reactors used at the gas oil hydrotreatment reactors available at Amuay refinery (PDVSA).
R. Lopez, C.G. Dassori
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Optical Pointing Systems for the TM VGOS Telescope
2021 13th International Conference on Communication Software and Networks (ICCSN), 2021We present here the systems aimed to measure and minimize the pointing errors for TM VGOS Telescope. The principle of pointing error correction of radio telescope is the same as that of optical telescope. By conducting pointing measurement test on target source with known precise direction, the pointing error test samples are obtained, and then the ...
Zhengxiong Sun, Gou Wei, Guangli Wang
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Scheduling for VGOS twin-telescopes
2016The 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.
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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 +2 more
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An Overview of Shanghai VGOS Wideband VLBI System
2019 IEEE 11th International Conference on Communication Software and Networks (ICCSN), 2019The 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,
Guang Li Wang
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Measurement of Cross-Polarization Gains of VGOS Antennas
2023VGOS 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.
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