Results 41 to 50 of about 132,086 (264)

Digital Twin‐Based Optimization of Service Availability in LEO Mega Constellations Considering Handover Delays in Open RAN

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT As non‐terrestrial networks (NTNs) become integral to future 6G systems, ensuring seamless connectivity and service continuity over low Earth orbit (LEO) satellite constellations is essential. This work investigates the impact of open radio access network (RAN) functional splits on handover performance in NTNs, focusing on minimizing service ...
Siva Satya Sri Ganesh Seeram, Luca Feltrin, Mustafa Ozger, Cicek Cavdar   +3 more
wiley   +1 more source

Research Direction and Science Evaluation: The Role of Coherence and Alignment

Journal of Economics &Management Strategy, EarlyView.
ABSTRACT The decisions of funding agencies greatly influence the direction of scientific research; however, our understanding of how applicants' research directions affect the selection process remains limited. In this study, we investigate how a project's coherence with a scientist's previous work and its alignment with current scientific trends ...
Charles Ayoubi, Sandra Barbosu, Michele Pezzoni, Fabiana Visentin   +3 more
wiley   +1 more source

The Influence of Sudden Stratospheric Warming on the Development of Ionospheric Storms: The Alma-Ata Ground-Based Ionosonde Observations

Atmosphere
This paper examines the response of the ionosphere to the impact of two moderate geomagnetic storms observed on January 17 and 26–27, 2013, under conditions of strong sudden stratospheric warming.
Galina Gordiyenko, Artur Yakovets, Yuriy Litvinov, Alexey Andreev   +3 more
doaj   +1 more source

Methods and Algorithms of Subsurface Holographic Sounding

Remote Sensing, 2022
In our experiments, we develop and test portable multi-element receiver antenna arrays, electrically scanned in order to immediately obtain a recognizable image of subsurface objects.
A. V. Popov, A. E. Reznikov, A. I. Berkut, D. E. Edemsky, P. A. Morozov, I. V. Prokopovich   +5 more
doaj   +1 more source

Modeling D-Region Ionospheric Response of the Great American TSE of August 21, 2017 from VLF signal perturbation

, 2018
Solar eclipse is an unique opportunity to study the lower ionospheric variabilities under a controlled perturbation when the solar ultraviolet and X-ray are temporally occulted by the lunar disk.
Basak, Tamal, Chakrabarti, Sandip K., Chakraborty, Suman, Sasmal, Sudipta, Tucker, Robert L.   +4 more
core   +1 more source

Combination of Soviet-Era Surface Gravity and Modern Satellite Data for Geoid Model Computation: A Case Study for Kazakhstan

Computation
Accurate geoid determination is essential for height system unification and for converting Global Navigation Satellite System (GNSS) ellipsoidal heights to orthometric heights.
Daniya Shoganbekova, Asset Urazaliyev, Serik Nurakynov, Magzhan Kozhakhmetov, Nailya Zhaksygul, Roman Sermiagin   +5 more
doaj   +1 more source

Ionospheric convection and equivalent ionospheric currents in the dayside high‐latitude winter ionosphere [PDF]

Journal of Geophysical Research: Space Physics, 1999
Ionospheric convection inferred from Super Dual Auroral Radar Network (SuperDARN) HF radar measurements is compared with an equivalent ionospheric convection derived from ground magnetometer data in the dayside winter high‐latitude ionosphere. Although there was general agreement between observed convection patterns produced by radars and magnetometers,
W. B. Lyatsky, A. V. Kustov, G. J. Sofko, B. Jacobsen, D. André, L. L. Cogger   +5 more
openaire   +1 more source

Hybrid Geoid Modelling with AI Enhancements: A Case Study for Almaty, Kazakhstan

Algorithms
Developing a high-precision regional geoid model is a key element in modernizing Kazakhstan’s vertical reference framework and ensuring consistent GNSS-based height determination. However, the mountainous terrain of southeastern Kazakhstan, characterized
Asset Urazaliyev, Daniya Shoganbekova, Serik Nurakynov, Magzhan Kozhakhmetov, Nailya Zhaksygul, Roman Sermiagin   +5 more
doaj   +1 more source

The Dependence of Peak Electron Density on Solar Irradiance in the Ionosphere of Mars [PDF]

, 2013
National Aeronatics and Space Administration (NASA) (NNX08AN56G, NNX08AP96G ...
Fallows, Kathryn, Girazian, Zachary, Withers, Paul   +2 more
core   +1 more source

Evaluation of Particle Scattering by Locally Generated Fast Magnetosonic Waves in the Martian Ionosphere

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Locally generated fast magnetosonic (local MS) waves in the Martian ionosphere have been reported recently, which are different from the solar wind‐driven MS waves. However, their effects on particle scattering have not been reported yet. This study pioneers the investigation of electron, proton, and oxygen atomic ion scattering induced by ...
Fei Yao, Xiongdong Yu, Zhigang Yuan, Kaijun Liu   +3 more
wiley   +1 more source