Results 21 to 30 of about 154 (132)
Earth, Planets and Space, 2023 VLBI simulation studies are carried out to investigate the impact of any proposed station or strategy on the geodetic parameters, such as Earth Orientation Parameters (EOP) and Terrestrial Reference Frame (TRF). In general, such studies are performed for
Sujata Dhar +5 more
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The Short-Arc Precise Orbit Determination of GEO Satellites Using VLBI and Transfer Ranging
Remote Sensing, 2022 It is important for a geostationary Earth orbit (GEO) satellite to rapidly recover its orbit after a maneuver with short-arc precise orbit determination (POD).
Kai Nan +5 more
doaj +1 more source
Estimation of VGOS Station Coordinates [PDF]
, 2020 <p>With the number of available VGOS (VLBI Global Observing System) sessions rising, precise coordinates for the participating stations become more important. While station coordinates can be estimated during the VLBI (Very Long Baseline Interferometry) analysis, the definition of the geodetic datum via Not-Net-Rotation (NNR) and
Markus Mikschi +2 more
openaire +2 more sources
Intracrystalline mesoporosity over Y zeolites. Processing of VGO and resid-VGO mixtures in FCC [PDF]
Catalysis Today, 2017 Abstract Prototypes of FCC catalysts containing 30%wt. Y zeolite with different intracrystalline mesoporosity generated by alkaline desilication, on an inert silica matrix, were tested in cracking a conventional vacuum gasoil (VGO) feedstock, alone and mixed with an atmospheric tower residue (ATR).
García, Juan Rafael +2 more
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Journal of Marine Science and Engineering, 2023 The Yellow Sea Cold Water Mass (YSCWM) is an important component of the hydrodynamic system and it significantly impacts the primary production of the Yellow Sea.
Jing Yang +7 more
doaj +1 more source
VGOS Intensives Ishioka-Onsala [PDF]
, 2020 <p>The VLBI Global Observing System (VGOS) is the VLBI contribution to GGOS.&#160;During the last years, several VGOS stations have been established, the VGOS observation program has started, and by 2020 VGOS has achieved an operational state involving eight international VGOS stations.&#160;Further VGOS stations ...
Rüdiger Haas +6 more
openaire +2 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
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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. +7 more
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Advanced Science, Volume 13, Issue 21, 13 April 2026.Scheme illustrating the selective conversion of plastic waste to isomerized C4‐C12 products using RuSZ1 under different reaction conditions. ABSTRACT In recent years, catalytic hydrocracking has emerged as a promising waste‐to‐feedstock solution for processing plastic waste.
Xinbang Wu +8 more
wiley +1 more source
The Canadian Journal of Chemical Engineering, Volume 104, Issue 3, Page 1372-1386, March 2026.This work demonstrates the application of neural ordinary differential equations (neural ODEs) for learning hydrocracking reaction kinetics directly from data, achieving robust predictions under noise and sparsity while preserving mechanistic interpretability through gradient‐based analysis of temperature‐ and concentration‐dependent reaction rates ...
Souvik Ta +2 more
wiley +1 more source