Results 81 to 90 of about 22,374 (269)
Ionospheric Data Fusion With GNSS, GNSS‐RO and Satellite Altimetry Based on Machine Learning
Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.Abstract Global Ionospheric Maps (GIMs) are essential in Global Navigation Satellite System (GNSS) applications, particularly for correcting ionospheric delays in single‐frequency positioning. GIMs are mainly derived from dual‐frequency GNSS observations, but the uneven distribution of ground stations—sparse over oceans—reduces accuracy in these ...
Marcel Iten, Shuyin Mao, Benedikt Soja
wiley +1 more source
Shanghai VLBI Correlator [PDF]
, 2013 This report summarizes the activities of the Shanghai VLBI Correlator during ...
Fengchun Shu +5 more
core
Radio Science, Volume 61, Issue 6, June 2026.Abstract Since its observation in 2019, the first image of a super‐massive black hole using Very Long Baseline Interferometry (VLBI) with an Earth‐scale baseline has generated much scientific and public interest. Work is now underway to extend the baseline into space to obtain higher image resolution.
E. A. Burt +5 more
wiley +1 more source
Effects of Surface Errors of Antennas on Detection Performance of Space VLBI
Aerospace, 2022 This work investigates the effects of the surface errors of the satellite antenna on the detection performance of the space VLBI system. First, the relationship between the surface errors and the antenna gain loss is analyzed, and then the influence of ...
Yangyang Zhang, Huijie Liu, Xingfu Liu
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Japanese VLBI Project — Vera [PDF]
Symposium - International Astronomical Union, 1988 The Japanese VLBI project VERA (VLBI for the Earth Rotation study and Astrometry) is being designed. It will be dedicated to regular monitoring of the Earth's rotation and astrometry. VERA will be composed of two antennas spanning about 2300km and a correlator of multi-station capability. The diameters of the antennas are 35m and 15m.
Mitsumi Fujishita, Tadayoshi Hara
openaire +1 more source
Earth and Space Science, Volume 13, Issue 5, May 2026.Abstract Polar motion prediction is an important means to study the dynamics of Earth's rotation and detect the internal structure of the Earth. This paper proposes an LS + iTransformer method that combines the least squares (LS) method with the iTransformer deep learning model. Using IERS EOP 20 C04 data from 2000 to 2022, Fast Fourier Transform (FFT)
Huizhong Zhu +5 more
wiley +1 more source
РАДИОСТРУКТУРА ИСТОЧНИКА 1803÷784
Odessa Astronomical Publications, 2011 Results of processing of data of ground-space VLBI experiment titled V053 are presented. These observations were made in 1997 October with 10 antennas of American interferometer VLBA and with Japan space telescope VSOP (VLBI Space Orbit Program).
A. А. Чуприков
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Dissecting the AGN Disk–Jet System with Joint VLBI-Gaia Analysis [PDF]
Astrophysical Journal, 2018 We analyze differences in positions of active galactic nuclei (AGNs) between Gaia data release 2 and very long baseline interferometry (VLBI) and compare the significant VLBI-to-Gaia offsets in more than 1000 objects with their jet directions. Remarkably
A. Plavin, Y. Kovalev, L. Petrov
semanticscholar +1 more source
Research on Polar Motion Prediction Accuracy Based on ETH and GFZ Angular Momentum Forecast Products
Earth and Space Science, Volume 13, Issue 5, May 2026.Abstract Polar motion (PM), a critical element of Earth Orientation Parameters (EOP), is essential for high‐precision applications such as deep space exploration and satellite navigation. Recent advances in prediction methods utilizing Effective Angular Momentum (EAM) data have become a key pathway for enhancing PM forecast accuracy.
Xishun Li +10 more
wiley +1 more source
VieSched++: A New VLBI Scheduling Software for Geodesy and Astrometry
Publications of the Astronomical Society of the Pacific, 2019 We present a new Very Long Baseline Interferometry (VLBI) scheduling software called VieSched++, which is a stand-alone tool of the Vienna VLBI and Satellite Software (VieVS).
M. Schartner, J. Böhm
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