Results 61 to 70 of about 9,059 (229)

Multi-Maser VLBI structure of the high-mass SFR G16.59-0.05 [PDF]

, 2008
In the following we summarize our results based on multi-epoch, phase referenced, Very Long Baseline Interferometry (VLBI) observations of maser associations towards the high-mass Star Forming Region (SFR) G16.59-0.05. We observed H2O 22.2 GHz (4 epochs)
Riccardo Cesaroni, TARCHI, ANDREA, Andrea Tarchi, MOSCADELLI, Luca, R.S. Furuya, SANNA, ALBERTO, CESARONI, Riccardo, Furuya, R. S., Alberto Sanna, Luca Moscadelli   +9 more
core   +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, Yuanwei Wu, Qiaoli Kong, Hai‐Hua Qiao, Tangrenjie Ye, Haiyan Yang, Zhizhuo Zhang, Xuan Cheng, Xuhai Yang, Xiaohui Li, Shougang Zhang   +10 more
wiley   +1 more source

Evaluate the Prediction Level of Polar Motion Interpolation for 6 hr in Ideal and Real Environments

Earth and Space Science, Volume 13, Issue 1, January 2026.
Abstract With the increasing demands for global development, deep space exploration missions are taking place more frequently, rendering the traditional 24‐hr Polar Motion (PM) predictions inadequate for supporting the frequent operations of spacecraft.
Wei Miao, Xueqing Xu, Yonghong Zhou
wiley   +1 more source

EVN e-VLBI detections of MAXI J1659-152 [PDF]

, 2010
We observed MAXI J1659-152 following its sub-millimeter and centimeter radio detections with the European VLBI Network (EVN) in real-time e-VLBI ...
Paragi, Zsolt, Taylor, G.B., Wijers, R.A.M.J., Kouveliotou, C., Garrett, M.A., Taylor, G., van der Horst, A.J., Woods, P.M., Paragi, Z., Ramirez Ruiz, E., Granot, J., Horst, A. van der, Wijers, R., Ramirez-Ruiz, E., Kuulkers, E., Gehrels, N., Woods, P., Garrett, M.   +17 more
core  

Absolute orientation of Galileo orbits from simulated VLBI and GNSS observations [PDF]

, 2023
The possibility of observing Galileo satellites with Very Long Baseline Interferometry (VLBI) telescopes may become possible in future as there are plans to put VLBI transmitters on these satellites.
Böhm, Johannes; orcid:, Wolf, Helene; orcid:, Hugentobler, Urs; orcid:   +2 more
core   +1 more source

FinalKAN: A Dual‐Stream KAN Network Integrating Multisource Features for Radio Telescope Pointing Correction

Advances in Astronomy, Volume 2026, Issue 1, 2026.
This paper investigates the degradation of pointing accuracy in the Kunming 40‐m radio telescope due to long‐term equipment aging and environmental disturbances. Conventional linear pointing models are constrained by their linear modeling framework, making it difficult to accurately represent the nonlinear errors induced by temperature, wind speed, and
Yao He, Longfei Hao, Wei Dai, Fernando Aguado Agelet   +3 more
wiley   +1 more source

The AUSTRAL VLBI observing program [PDF]

Journal of Geodesy, 2016
The AUSTRAL observing program was started in 2011, performing geodetic and astrometric very long baseline interferometry (VLBI) sessions using the new Australian AuScope VLBI antennas at Hobart, Katherine, and Yarragadee, with contribution from the Warkworth (New Zealand) 12 m and Hartebeesthoek (South Africa) 15 m antennas to make a southern ...
L. Plank, J. E. J. Lovell, J. N. McCallum, D. Mayer, C. Reynolds, J. Quick, S. Weston, O. Titov, S. S. Shabala, J. Böhm, T. Natusch, M. Nickola, S. Gulyaev   +12 more
openaire   +3 more sources

A History of UNAVCO: Four Decades of Advancing Geodesy

Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.
Abstract UNAVCO was a university‐governed consortium funded by the National Science Foundation (NSF), with support from the National Aeronautics and Space Administration (NASA) and the United States Geological Survey (USGS), to support geoscience research and education using geodesy.
Emily E. Zawacki, Donna J. Charlevoix, Charles M. Meertens, Jeffrey T. Freymueller, Tonie van Dam   +4 more
wiley   +1 more source

VERA’s 20 yr Evolution in Science and Technology

Galaxies
We review the past 20 yr evolution of VERA (VLBI Exploration of Radio Astrometry) in both science and techinology. VERA is a VLBI array in Japan which consists of four 20 m-diameter telescopes, originally dedicated to phase-referencing VLBI astrometry ...
Mareki Honma, Tomoya Hirota, Tomoaki Oyama, Akiharu Nakagawa   +3 more
doaj   +1 more source

Modeling Nearby Low-Luminosity Active-Galactic-Nucleus Jet Images at All VLBI Scales

Galaxies, 2022
Relativistic jets from nearby low-luminosity active-galactic-nuclei (LLAGN) were observed by Very-Long Baseline Interferometry (VLBI) across many orders of magnitude in space, from milliparsec to sub-parsec scales, and from the jet base in the vicinity ...
Hung-Yi Pu, Keiichi Asada, Masanori Nakamura   +2 more
doaj   +1 more source