Results 71 to 80 of about 266,964 (192)

Capturing Extreme Water Vapor and Instability With High‐Resolution GNSS Monitoring

Atmospheric Science Letters, Volume 27, Issue 2, February 2026.
This study used data from a high‐resolution Global Navigation Satellite System network (< 10 km spacing), including private stations, to analyze water vapor structure during a heavy rainfall event in Japan. The network captured localized extreme precipitable water vapor (> 70 mm) and a moist absolutely unstable layer near the humid core.
Mikiko Fujita
wiley   +1 more source

Evaluation of the performance of Multi-GNSS advanced orbit and clock augmentation – precise point positioning (MADOCA-PPP) in Japan region

Geodesy and Cartography
For users of Precise Point Positioning (PPP), Multi-GNSS Advanced Orbit and Clock Augmentation PPP signals provide corrective data. When using the PPP approach and/or PPP-Ambiguity Resolution (AR) method, the QZSS signal provides globally applicable ...
Atınç Pırtı
doaj   +1 more source

A Novel Robust High‐Precision Ionospheric Delay Modeling for PPP‐RTK Using Crowdsourced Data

Space Weather, Volume 24, Issue 2, February 2026.
Abstract The performance of PPP‐RTK is critically dependent on the quality of ionospheric corrections derived from a reference network. While the proliferation of mass‐market Global Navigation Satellite System (GNSS) devices offers a promising crowdsourcing opportunity to densify or replace this infrastructure, it introduces the formidable challenge of
Bo Wang, Jiaxi Zhu, Zhilu Wu, Dejin Zhang, Zhao Li, Minsi Ao, Shengfeng Gu   +6 more
wiley   +1 more source

Freshly Generated Super Sunrise Plasma Bubbles During the Geomagnetic Storm on November 5–6, 2023

Space Weather, Volume 24, Issue 1, January 2026.
Abstract During the geomagnetic storm on November 5–6, 2023, freshly generated super sunrise equatorial plasma bubbles (EPBs) and associated irregularities over the 80°–140°E sector were observed combining ground‐based and space observations from GNSS, ionosondes, HF Doppler records, and several satellite missions (COSMIC2, Swarm, and DMSP).
Ke Li, Donghe Zhang, Yaoyu Tian, Yi Zeng, Guanglin Yang, Xiukuan Zhao, Guozhu Li, Yongqiang Hao   +7 more
wiley   +1 more source

Comparative Analysis of Mainstream ISB Stochastic Model Characteristics for Enhancing GNSS PPP With Wuhan University Precise Products

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
This study focuses on the critical challenge of selecting an overall optimal ISB stochastic model to improve GNSS PPP performance, which establishes a comprehensive assessment framework integrating positioning accuracy, convergence time, ISB characteristics, residual analysis, correlation metrics and physical mechanism interpretation.
Ban Zhao
wiley   +1 more source

Equatorial Ionospheric VTEC Perturbations During the 21 June 2020 Solar Eclipse

Earth and Space Science, Volume 12, Issue 12, December 2025.
Abstract The annular solar eclipse of 21 June 2020, provided a valuable opportunity to examine the ionospheric response to celestial events. This study analyzes variations in Vertical Total electron content (VTEC) over the equatorial region using data from the UQRG Global Ionospheric Map (GIM), ground‐based GPS‐TEC measurements, and equatorial ...
Atirsaw Muluye Tilahun, Asebe Oljira, Melessew Nigussie, Sujan Prasad Gautam, Yohannes Getachew Ejigu   +4 more
wiley   +1 more source

Ultra-Low-Cost Real-Time Precise Point Positioning Using Different Streams for Precise Positioning and Precipitable Water Vapor Retrieval Estimates

Algorithms
This article aims to examine the real-time precise point positioning (PPP) solution’s accuracy utilizing the low-cost dual-frequency multi-constellation U-blox ZED-F9P module and real-time GNSS orbit and clock products from five analysis centers ...
Mohamed Abdelazeem, Amgad Abazeed, Hussain A. Kamal, Mudathir O. A. Mohamed   +3 more
doaj   +1 more source

Impacts of Space Weather‐Induced Satellite Navigation Errors on UAV Collision Risk: An Estimation for Parallel and Crossing Routes

Space Weather, Volume 23, Issue 11, November 2025.
Abstract Satellite navigation systems are vulnerable to space weather disturbances, which can degrade positioning accuracy and potentially increase the collision risk of unmanned aerial vehicles (UAVs). This study investigates the influence of navigation errors caused by ionospheric scintillation on UAV encounter scenarios. Two route configurations are
Dabin Xue, Chengpeng Jiang, Shiwei Yu, Zhe Yang, Jialing Liu   +4 more
wiley   +1 more source

Assessing the Quality of GNSS Observations for Permanent Stations in Mexico (2020–2023)

Geomatics
A quality assessment of Global Navigation Satellite System (GNSS) observations was conducted for 95 Continuously Operating Reference Stations (CORSs) across Mexico over the period 2020–2023 using the ANUBIS software package.
Rosendo Romero-Andrade, Karan Nayak, Rafaela Mirasol Llanes-Hernández, Norberto Alcántar-Elizondo, Tiojari Dagoberto Guzmán-Galindo, Yedid Guadalupe Zambrano-Medina   +5 more
doaj   +1 more source

Characteristics of Large‐Scale Traveling Ionospheric Disturbances During the 10 May 2024 Geomagnetic Storm

Space Weather, Volume 23, Issue 10, October 2025.
Abstract Based on the total electron content (TEC) observation in the Asian‐Australian and American sectors, this paper investigates the characteristics and hemispheric asymmetry of large‐scale traveling ionospheric disturbances (LSTIDs) during the 10 May 2024 superstorm. We found that the amplitudes and meridional phase velocities of LSTIDs in the two
Tingwei Han, Huijun Le, Yuyan Yang, Wenbo Li, Wenjie Sun, Han Ma, Yijia Zhou, Bowei Liu, Rongjin Du, Libo Liu, Yiding Chen, Ruilong Zhang   +11 more
wiley   +1 more source