Results 11 to 20 of about 2,072 (163)
Bridging astronomical, astrometric and geodetic scheduling for VGOS
Journal of Geodesy, 2023 Very Long Baseline Interferometry (VLBI) experiments are organized within the geodetic, astrometric and astronomical communities for different applications, requiring different observation strategies adopted in scheduling.
Matthias Schartner +2 more
exaly +8 more sources
On the Integration of VLBI Observations to GENESIS into Global VGOS Operations
Remote SensingThe upcoming European Space Agency (ESA) satellite mission GENESIS is an Earth-orbiting satellite carrying instruments of all four space geodetic techniques.
David Schunck +2 more
doaj +3 more sources
Qualitative Analysis of Nitrogen and Sulfur Compounds in Vacuum Gas Oils via Matrix-Assisted Laser Desorption Ionization Time of Flight Mass Spectrometry [PDF]
MoleculesAnalysis of the heavy fractions in crude oil has been important in petroleum industries. It is well known that heavy fractions such as vacuum gas oils (VGOs) include heteroatoms, of which sulfur and nitrogen are often characterized in many cases.
Morio Ueda +9 more
doaj +2 more sources
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
doaj +2 more sources
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
Investigating a continental Australian VGOS VLBI intensive for UT1-UTC determination
Earth, Planets and SpaceIn this simulation study, we investigate the potential performance of VLBI Intensives using the AuScope 12-metre VLBI network. This continental Australian network consisting of three stations, has recently been fully upgraded with VGOS receivers and has ...
Tiege McCarthy +2 more
doaj +2 more sources
Earth, Planets and SpaceIrregularities in the Earth’s rotation speed are quantified by the difference between Universal Time (UT1) and Coordinated Universal Time (UTC).
Arnab Laha +6 more
doaj +2 more sources
Combining VGOS, legacy S/X and GNSS for the determination of UT1
Journal of Geodesy, 2022 We perform a combination on the observation level (COL) between VLBI and co-located GNSS in the context of VLBI intensive sessions. Our approach revolves around an estimation procedure which uses 3 h of GNSS data that uniformly encapsulate the 1-h VLBI ...
Matthias Schartner +2 more
exaly +2 more sources
Prospective study of high geodetic resolution to future VGOS reference point determination
Geodesy and Geodynamics, 2019 The fast slewing rate and wide band of the VLBI2010 Global Observing System (VGOS) telescopes are beneficial to procure more observations and to obtain VLBI reference points (RPs) of high precisions.
Zhibin Zhang, Guangli Wang, Dezhen Xu
exaly +3 more sources
Radio Science, Volume 61, Issue 9, September 2026.With the ongoing transition for geodetic Very Long Baseline Interferometry (VLBI) from the use of legacy S/X telescopes to the VLBI Global Observing System (VGOS), it is necessary to connect the new VGOS network to the existing legacy S/X telescopes. One
Rebekka Handirk +10 more
semanticscholar +2 more sources