Results 21 to 30 of about 825 (182)
Precise VLBI/GNSS ties with micro-VLBI
, 2023 We present here a concept of measuring local ties between collocated GNSS and VLBI stations using the microwave technique that effectively transforms a GNSS receiver to an element of a VLBI network. This is achieved by modifying the signal chain that allows to transfer voltage of the GNSS antenna to a digitizer via a coaxial cable.
Petrov, Leonid +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
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
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
Geodetic VLBI Analysis at the National Geographic Institute of Spain
Proceedings, 2019 National Geographic Institute of Spain has a strong background concerning technical aspects of geodetic VLBI. As a step forward in this field, a VLBI analysis team has been set up and tests with different software packages have been carried out.
Víctor Puente +3 more
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
Reports on Geodesy and Geoinformatics, 2016 Very Long Baseline Interferometry (VLBI) is the only space geodetic technique capable to realise the Celestial Reference Frame and tie it with the Terrestrial Reference Frame.
Wielgosz Agata +2 more
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