Results 31 to 40 of about 2,076 (165)

Electrically Small Antenna for BeiDou Chinese Navigation Satellite System

, 2020
A concept of electrically small antenna for BeiDou BD2 B3 Chinese navigation satellite system was developed and studied. Three main miniaturized techniques: antenna loading by using high permittivity materials, making some part of antennas virtual by ...
Wu, Changying, Bogdan, Grzegorz, Yevhen Yashchyshyn, Dmytro Vynnyk, Yashchyshyn, Yevhen, Changying Wu, Ivan Solskii, Haiduchok, Volodymyr, Solskii, Ivan, Volodymyr Haiduchok, Vynnyk, Dmytro, Grzegorz Bogdan   +11 more
core   +1 more source

Differential Code Bias Estimation using Multi-GNSS Observations and Global Ionosphere Map

, 2014
Measurements of Global Navigation Satellite System (GNSS) receivers are affected by systematic offsets re- lated to group and phase delays of the signal generation and processing chain.
Hauschild, André, Steigenberger, Peter, Montenbruck, Oliver   +2 more
core   +1 more source

Tracing Three Decades of Low Earth Orbit Satellite Communication Development: A Bibliometric and Main Path Analysis of Network Architectures, Protocol Evolution, and Emerging Intelligent Services

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Low Earth Orbit (LEO) satellite communication systems have evolved into a critical component of global broadband networks, enabling wide‐area connectivity, IoT services, and intelligent multilayer satellite–terrestrial integration. Despite rapid advancements in constellation deployment, routing mechanisms, resource management, and LEO–5G/6G ...
Wei‐Hao Su, Ya‐Chen Chuang, Long‐Sheng Chen   +2 more
wiley   +1 more source

Operationalizing the Metaverse for Urban Sustainability: Evidence From an Expert Panel and the Seoul Metaverse City Case Study

Sustainable Development, EarlyView.
ABSTRACT Smart cities and urban digital twins have fostered the emergence of immersive environments, such as the metaverse. While contemporary scholarlship has increasingly examined the integration of the metaverse within smart city infrastructures, the critical nexus between urban sustainability and the metaverse remains largely under‐researched. This
Jose Manuel Diaz‐Sarachaga, Ayyoob Sharifi   +1 more
wiley   +1 more source

IGS-MGEX: Preparing the Ground for Multi-Constellation GNSS Science [PDF]

, 2013
With a total of four new and emerging constellations (BeiDou, Galileo, QZSS, IRN SS) as well as the ongoing modernization of GPS and GLONASS the world of satellite navigation presently experiences dramatic changes.
Langley, Richard, Weber, Georg, Steigenberger, Peter, Hugentobler, Urs, Montenbruck, Oliver, Khachikyan, Robert, Mervart, Leos   +6 more
core  

Building a Continental‐Scale Geodetic Network: The Plate Boundary Observatory (PBO)

Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Abstract The Plate Boundary Observatory (PBO) transformed the use of geodesy in North America to study crustal deformation and plate boundary processes by establishing a continental‐scale, standardized, open‐access geodetic network. Built and operated by UNAVCO between 2003 and 2018 as part of the National Science Foundation (NSF)‐funded EarthScope ...
Emily E. Zawacki, Michael E. Jackson, Glen S. Mattioli, David J. Mencin, Karl Feaux, Donna J. Charlevoix   +5 more
wiley   +1 more source

Research on Beidou and GPS dual satellite positioning algorithms for substation site positioning [PDF]

, 2020
With the rapid development of global satellite navigation system technology, multi-mode satellite navigation positioning technology that can be compatible with multiple navigation systems at the same time is bound to become the future development trend ...
Hongwei Huang, Junjie Feng, Junfeng Shi, Lei Gao   +3 more
core   +2 more sources

Space Weather Effects From Moderate to Severe Geomagnetic Storms in October 2024 Over the Latin American Sector

Space Weather, Volume 24, Issue 6, June 2026.
Abstract This study presents a detailed case study of the ionospheric impacts of moderate (G2) and severe (G4) geomagnetic storms over the Latin American sector, with particular emphasis on the formation and suppression of equatorial plasma bubbles (EPBs).
C. S. Carmo, L. Dai, C. M. Wrasse, D. Barros, H. Takahashi, J. R. Costa, L. F. R. Vital, P. R. Jauer, C. De La Jara, A. J. Carrasco, C. A. O. B. Figueiredo, C. Wang, H. Li, Z. Liu   +13 more
wiley   +1 more source

The Performance Testing Method of Optical Fiber Time Synchronization in BeiDou Ground-Based Navigation Signal Net

, 2016
In BeiDou ground-based navigation signal net, the technology of optical fiber time and frequency transfer, whose design precision excels 0.5 ns, is used to realize the time synchronization between ground stations. Limited by condition and precision, some
Tang, Tingsong, Tingsong Tang, Fengjuan Wu, Chen, Xing, Zhao, Yun, Zhao, Na, Liu, Changjie, Wu, Fengjuan, Yun Zhao, Na Zhao, Xing Chen, Changjie Liu, Qiu, Zhen, Zhen Qiu   +13 more
core   +1 more source

A Novel Power Inversion Antenna Array for the Beidou Navigation Satellite System [PDF]

IEEE Access, 2019
Power inversion (PI) arrays have been employed to suppress interference in satellite navigation systems. When the incident direction of a satellite signal is near that of the interference, there will be a significant degradation in the signal to noise ratio (SNR).
Yiheng Jin, Hao Zhang 0004, Tingting Lu, Hua Yang, T. Aaron Gulliver   +4 more
openaire   +2 more sources