Results 61 to 70 of about 266,964 (192)

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

Sub-daily polar motion from GPS, GLONASS, and Galileo. [PDF]

, 2020
We derive an empirical model of the sub-daily polar motion (PM) based on the multi-GNSS processing incorporating GPS, GLONASS, and Galileo observations.
Zajdel, Radoslaw, Kazmiersky, Kamil, Dach, Rolf, Prange, Lars, Sośnica, Krzysztof, Bury, Grzegorz   +5 more
core   +2 more sources

The Development of a Low Power GNSS System, as Part of a Drone Assisted Environmental Sensor Network for a Glacial Environment

Earth and Space Science, Volume 13, Issue 4, April 2026.
Abstract We show the development of an innovative Internet of Things Real Time Kinematic Global Navigation Satellite System, to study the short‐term changes in surface velocity of two adjacent Icelandic glaciers, in order to understand the response of glaciers to climate change.
K. Martinez, S. Attia, G. Bragg, A. Andrews, N. R. Baurley, J. K. Hart   +5 more
wiley   +1 more source

A square root information filter for multi-GNSS real-time precise clock estimation

Satellite Navigation, 2021
Real-time satellite orbit and clock estimations are the prerequisite for Global Navigation Satellite System (GNSS) real-time precise positioning services.
Xiang Zuo, Xinyuan Jiang, Pan Li, Jungang Wang, Maorong Ge, Harald Schuh   +5 more
doaj   +1 more source

TOMO4D Operator for Assimilation of GNSS Tomography‐Derived Water Vapor Fields Into the WRFDA 4DVAR System to Improve Regional Rainfall Forecasting

Journal of Advances in Modeling Earth Systems, Volume 18, Issue 4, April 2026.
Abstract Accurate representation of atmospheric water vapor is crucial for improving numerical weather prediction, particularly over regions with complex topography and sparse observation networks. Although assimilation of Global Navigation Satellite System (GNSS)‐derived integrated products such as zenith total delay or precipitable water vapor can ...
Arash Tayfehrostami, Yazdan Amerian, Saeed Izanlou, Majid Azadi   +3 more
wiley   +1 more source

Multiple Ambiguity Datum Precise Point Positioning Technique Using Multi-Constellation GNSS: GPS, GLONASS, Galileo and BeiDou

, 2015
Precise Point Positioning (PPP) is traditionally based on dual-frequency observations of GPS or GPS/GLONASS satellite navigation systems. Recently, new GNSS constellations, such as the European Galileo and the Chinese BeiDou are developing rapidly.
M. A. Rabbou
semanticscholar   +1 more source

Ionospheric Response to the 8 April 2024 Total Solar Eclipse: Plasma Depletion and Eclipse‐Driven MsTIDs

Space Weather, Volume 24, Issue 4, April 2026.
Abstract The total solar eclipse on 8 April 2024 provided a unique opportunity to investigate the three‐dimensional (3‐D) ionospheric response under enhanced solar activity over North America. In this study, we processed high‐density GNSS observations from ∼1,700 stations to derive vertical total electron content and applied a multi‐term sinusoidal ...
Wenbin Liang, Xiyan Sun, Yuanfa Ji, Xiaodong Ren   +3 more
wiley   +1 more source

The Preliminary Results for Five-System Ultra-Rapid Precise Orbit Determination of the One-Step Method Based on the Double-Difference Observation Model

Remote Sensing, 2018
The predicted parts of ultra-rapid orbits are important for (near) real-time Global Navigation Satellite System (GNSS) precise applications; and there is little research on GPS/GLONASS/BDS/Galileo/QZSS five-system ultra-rapid precise orbit determination;
Fei Ye, Yunbin Yuan, Bingfeng Tan, Zhiguo Deng, Jikun Ou   +4 more
doaj   +1 more source

Global Bottomside Ionospheric Modeling Based on GNSS‐RO Observations From the Tianmu‐1 Constellation

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Radio occultation (RO) observations provide a crucial means for estimating the global Vertical Bottomside Electron Content (VBEC) in the ionosphere. However, the limited number of low Earth orbit (LEO) satellites in existing RO missions restricts the capability for high‐precision reconstruction of global VBEC spatiotemporal variations.
Linghuo Jian, Xiaodong Ren, Yingchuan Yang, Xuan Le, Xiaohong Zhang   +4 more
wiley   +1 more source

INTEGRAÇÃO ENTRE GPS E GLONASS [PDF]

, 2004
O relacionamento entre o GLONASS (Global Navigation Satellite System) e o GPS (Global Positioning System) é explorado neste artigo, que contém uma descrição de suas diferenças e similitudes.
dos Santos, Marcelo Carvalho, do Lago, Isabel Franco, Merege Filho, Pedro, Ferreira, Luiz Danilo Damasceno   +3 more
core   +1 more source