Results 21 to 30 of about 27,737 (204)

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

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, Yuzhu Cui, Kazuhiro Hada, Kunwoo Yi, Hyunwook Ro, Bong Won Sohn, Mieko Takamura, Salvatore Buttaccio, Filippo D’Ammando, Marcello Giroletti, Yoshiaki Hagiwara, Motoki Kino, Evgeniya Kravchenko, Giuseppe Maccaferri, Alexey Melnikov, Kotaro Niinuma, Monica Orienti, Kiyoaki Wajima, Kazunori Akiyama, Akihiro Doi, Do-Young Byun, Tomoya Hirota, Mareki Honma, Taehyun Jung, Hideyuki Kobayashi, Shoko Koyama, Andrea Melis, Carlo Migoni, Yasuhiro Murata, Hiroshi Nagai, Satoko Sawada-Satoh, Matteo Stagni   +31 more
doaj   +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

A Slower Superluminal Velocity for the Quasar 1156+295 [PDF]

, 1997
As part of an ongoing effort to observe high energy gamma-ray blazars with VLBI, we have produced 8 and 2 GHz VLBI images, at ten epochs spanning the years 1988 to 1996, of the quasar 1156+295.
B. Glenn Piner, Kerry A. Kingham, McHardy I. M., McHardy I. M., Tornikoski M.   +4 more
core   +2 more sources

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

Testing impact of the strategy of VLBI data analysis on the estimation of Earth Orientation Parameters and station coordinates

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, Tercjak Monika, Brzeziński Aleksander   +2 more
doaj   +1 more source

Data Handling within the International VLBI Service

Data Science Journal, 2013
The International VLBI Service for Geodesy and Astrometry (IVS) is a globally operating service that coordinates and performs Very Long Baseline Interferometry (VLBI) activities through its constituent components.
Dirk Behrend
doaj   +1 more source

Using software spectrometer to ensure VLBI signal chain reliability [PDF]

, 2015
Software spectrometer (SWSpec) developed for spacecraft tracking can be used to assure VLBI signal chain reliability, and phase stability of a VLBI receiver.
Calvés, Guifré Molera, Kallunki, Juha, Uunila, Minttu   +2 more
core   +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, Esther Azcue, Susana Garcia-Espada, Yaiza Gómez-Espada   +3 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, Fen Cao, Jianjun Gong, Hui Lei, Zhigang Li, Xuhai Yang   +5 more
doaj   +1 more source