Results 41 to 50 of about 1,750 (183)

Unconstrained GNSS Water Vapor Tomography With Real Data and LEO Augmentation

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract The availability of four complete GNSS constellations (GPS, GLONASS, BeiDou and Galileo) offers, for the first time, the possibility of performing water vapor tomographic inversions that do not rely on external data. A tomographic model that includes no external constraints and requires no first guess and no virtual observations is described ...
P. M. A. Miranda, G. A. Hajj, J. Teixeira, P. Mateus   +3 more
wiley   +1 more source

About Security Global Navigation Satellite System GLONASS

Безопасность информационных технологий, 2011
Threats of a security of global navigating satellite system GLONASS are considered, as well as the key threats influencing reliability of navigating definitions are allocated. The method of orbital monitoring of threats of a security of system GLONASS is
M. Y. Senatorov, R. B. Syatkovskiy
doaj  

Consistency of MGEX Orbit and Clock Products

Engineering, 2020
The analysis centers of the Multi-GNSS Pilot Project of the International GNSS Service provide orbit and clock products for the global navigation satellite systems (GNSSs) Global Positioning System (GPS), GLONASS, Galileo, and BeiDou, as well as for the ...
Peter Steigenberger, Oliver Montenbruck
doaj   +1 more source

Drivers of Mid‐Latitude Quiet‐Time Longitude Variations in Ionospheric Density

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract The aim of this study is to provide an observational benchmark of mid‐latitude quiet‐time variability in winds, O/N2, and TEC across longitude and local time to provide a foundation for future model–data comparison studies. The quiet‐time ionospheric structure is not uniform but rather exhibits pronounced longitudinal and local‐time ...
K. R. Greer, L. P. Goncharenko, V. L. Harvey, C. Cullens   +3 more
wiley   +1 more source

Scientific and technical support of GLONASS application in agricultural production

Сельскохозяйственные машины и технологии, 2015
Introduction of technologies of the operated farming in agricultural production will support quality hi-tech breakthrough of agrarian sector of economy and a demand of GLONASS system and means in agriculture.
A. A. Artyushin, I. G. Smirnov
doaj  

Assessment of Ionospheric Model Performance Over the US During the Extreme G5 2024 Mother's Day Geomagnetic Storm

Space Weather, Volume 24, Issue 5, May 2026.
Abstract This study evaluates 17 ionospheric models' performance over the Continental United States (CONUS) during the 2024 Mother's Day geomagnetic storm, using ground‐based GNSS Total Electron Content (TEC) and single‐frequency (SF) precise Single Point Positioning (SPP) technique. The storm produced significant positive storm effects during its main
Min‐Yang Chou, Jia Yue, Deimos Ibáñez Segura, J. D. Huba, Tzu‐Wei Fang, Charles Lin, Chi‐Yen Lin, Aaron Bukowski, Aaron Ridley, Ivan Galkin, Dieter Bilitza, Jack Wang, Mohammed Mainul Hoque, Maksym Petrenko, Paul Dimarzio, Maria M. Kuznetsova   +15 more
wiley   +1 more source

Performance Assessment of PPP Surveys with Open Source Software Using the GNSS GPS–GLONASS–Galileo Constellations

Applied Sciences, 2020
In this work, the performance of the multi-GNSS (Global Navigation Satellite System) Precise Point Positioning (PPP) technique, in static mode, is analyzed.
Antonio Angrisano, Gino Dardanelli, Anna Innac, Alessandro Pisciotta, Claudia Pipitone, Salvatore Gaglione   +5 more
doaj   +1 more source

Smartphone Carrier Phase TEC: A Study Across Ionospheric Spatio‐Temporal Scales

Space Weather, Volume 24, Issue 5, May 2026.
Abstract This study explores the potential of dual‐frequency smartphones as accessible tools for citizen science in ionospheric research. While prior work by Smith et al. (2024, https://doi.org/10.1038/s41586‐024‐08072‐x) demonstrated global ionospheric monitoring using aggregated pseudorange Total Electron Content (TEC) data from millions of Android ...
Nina Servan‐Schreiber, Vincent Ledvina, Joshua Semeter, Jeremy Kuzub, Michael Hirsch, Meghan LeMay, Kshitij Duraphe, Jen‐Hsin Chiao, Yafei Chen, Joaquín Díaz Peña   +9 more
wiley   +1 more source

Prediction of LAI in Scots Pine Forests of Türkiye Using UAV and Sentinel 2 Images

Transactions in GIS, Volume 30, Issue 3, May 2026.
ABSTRACT Monitoring the structural characteristics of vegetation cover is critical for understanding ecosystem functioning and sustainable forest management. Effective Leaf area index (LAIe) is directly related to photosynthetic capacity, carbon cycle, and water balance of ecosystems.
Hasan Aksoy, Annika Kangas, Petteri Packalen, Lauri Korhonen, Alkan Günlü   +4 more
wiley   +1 more source

Contribution of Russian (Soviet) Jurisprudence to Formation and Development of International Space Law

Московский журнал международного права, 2015
Russian (Soviet) Lawyers contributed significantly to the formation and development of corpus juris spatialis. In particular, according to former Chairman of the UN Committee on the peaceful uses of outer space Ambassador Dr.
Yuri Mikhailovich Kolosov, Mariam R. Yuzbashyan   +1 more
doaj   +1 more source