Results 21 to 30 of about 9,059 (229)
Comparison of VLBI and GNSS common view for time transfer
International Journal of Metrology and Quality Engineering, 2019 With the rapid development of optical clock, the stability and system uncertainty of optical clocks has reached a 1.0e–18 level. Optical clocks will likely constitute the next generation of time-frequency standards for redefining the SI second.
Wang Pingli +4 more
doaj +1 more source
Rotation of Earth and determination of Earth orientation parameters [PDF]
Geodetski Glasnik, 2015 Earth's rotation and elements of the Earth's orientation, with emphasis on the determination of the parameters of the Earth's orientation were described.
Mirko Borisov +2 more
doaj +1 more source
A 20+ year overview of VLBI observations of the peculiar radio source 3C 84 [PDF]
, 2023 The super-massive black holes (SMBH) located at the centres of AGN often launch highly relativistic jets. The main jet launching scenarios are either due to magnetic field lines anchored to the accretion disk (Blandford & Payne 1982) or directly ...
Paraschos, Georgios Filippos
core +1 more source
At the extremes of the electromagnetic spectrum: synergy of MAGIC and VLBI arrays in the study of blazar jets [PDF]
, 2023 The emission from blazar jets extends over the entire electromagnetic spectrum, from the radio to the very-high-energy (VHE) gamma rays range. The VLBI technique characterizes the parsec-scale regions of blazar jets. VLBI observations, e.g.
Nanci, Cristina on behalf of the MAGIC collaboration
core +1 more source
GPU-Based Parallel Implementation of VLBI Correlator for Deep Space Exploration System
Remote Sensing, 2021 Very Long Baseline Interferometry (VLBI) solution can yield accurate information of angular position, and has been successfully used in the field of deep space exploration, such as astrophysics, imaging, detector positioning, and so on.
Fan Zhang +4 more
doaj +1 more source
Preliminary Study on the Plate Motion in Korean Peninsula with New Korean VLBL Array [PDF]
Journal of Astronomy and Space Sciences, 2006 Korean Peninsula has been postulated to be on the Eurasian plate(EU). On the other hand, recent seismological works and GPS researches suggest that it is on a separate plate called the Amurian plate (AM).
Younghee Kwak, Tetsuo Sasao, Jungho Cho
doaj +1 more source
Scientific Applications of e-VLBI [PDF]
, 2009 The advantages of e-VLBI over traditional media-recorded VLBI are briefly discussed. These advantages lie in two broad areas, those which reduce the operational burden of VLBI and those which enable wholly new kinds of observations to be made.
John E. Conway +2 more
core +1 more source
A New Very Long Baseline Interferometry Method Based on the Uplink Signal
IEEE Access, 2020 Very long baseline interferometry (VLBI) is widely used for astronomical observations and navigation of deep space receivers. To solve the problems of the downlink signal being excessively weak to be received and the excessively large acquisition time, a
Linshan Xue, Weiren Wu, Xue Li
doaj +1 more source
Analysis on Impacts of KVN to Geodetic VLBI Network [PDF]
Journal of Astronomy and Space Sciences, 2006 KVN simulation, which is focused on evaluating the impacts of KVN to geodetic VLBI network, was performed. The KVN is under construction with three radio telescopes VLBI system for radio astronomy and space geodesy.
Jung-Ho Cho, Jong-Uk Park, Pil-Ho Park
doaj +1 more source
The Past and Future of East Asia to Italy: Nearly Global VLBI
Galaxies, 2023 We present here the East Asia to Italy Nearly Global VLBI (EATING VLBI) project. How this project started and the evolution of the international collaboration between Korean, Japanese, and Italian researchers to study compact sources with VLBI ...
Gabriele Giovannini +31 more
doaj +1 more source