Results 41 to 50 of about 2,072 (163)
Resources, 2021 Inter-criteria analysis was employed in VGO samples having a saturate content between 0.8 and 93.1 wt.% to define the statistically significant relations between physicochemical properties, empirical structural models and vacuum gas oil compositional ...
Dicho S. Stratiev +14 more
doaj +1 more source
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
openaire +2 more sources
VGOS Intensives Ishioka-Onsala [PDF]
, 2021 <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 2021 VGOS has achieved an operational state involving nine international VGOS stations.&#160;Further VGOS stations are ...
Rüdiger Haas +5 more
openaire +2 more sources
Ray tracing-based delay model for compensating gravitational deformations of VLBI radio telescopes
Journal of Geodetic Science, 2022 The precision and the reliability of very long baseline interferometry (VLBI) depend on several factors. Apart from fabrication discrepancies or meteorological effects, gravity-induced deformations of the receiving unit of VLBI radio telescopes are ...
Lösler Michael +6 more
doaj +1 more source
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
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
Journal of Geodesy, 2021 We have developed a broadband VLBI (very long baseline interferometry) system inspired by the concept of the VLBI Global Observing System (VGOS). The new broadband VLBI system was implemented in the Kashima 34 m antenna and in two transportable stations ...
M. Sekido +24 more
semanticscholar +1 more source
Validation of GNSS-based reference point monitoring of the VGOS VLBI telescope at Metsähovi
Proceedings of the 5th Joint International Symposium on Deformation Monitoring - JISDM 2022, 2022 VLBI telescope reference point, the closest point in the telescope primary axis from the secondary axis, is typically determined indirectly by observation of points co-rotating with the telescope.
U. Kallio +9 more
semanticscholar +1 more source
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
openaire +2 more sources
, 2021 The next-generation VLBI system called VGOS (VLBI Global Observing System) has been designed and built as a significant improvement over the legacy geodetic VLBI system to meet the accuracy and stability goals set by the Global Geodetic Observing System (
D. Mondal +6 more
semanticscholar +1 more source