Results 51 to 60 of about 1,516 (192)

Assimilation of 5G Base Station Networks as Ultra‐Dense Atmospheric Sensors for Advancing Heavy Rainfall Prediction

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract The zenith total delay (ZTD) retrieved from 5G communication base stations represents a novel observation source for numerical weather prediction (NWP), leveraging the extensive global deployment of 5G infrastructure. In this study, the direct assimilation of 5G‐ZTD observations into a high‐resolution NWP system was accomplished for the first ...
Jian Yin, Xiefei Zhi, Danni Huang, Chunqing Shang, Hong Liang, Kezuan Wang   +5 more
wiley   +1 more source

Impact Analysis of processing strategies on Long-term GPS ZTD

, 2023
Abstract. Homogenized atmospheric water vapor is an important prerequisite for climate analysis. Compared with other techniques, GPS has inherent homogeneity advantage, but it still requires reprocessing and homogenization to eliminate impacts of applied strategy and observation environmental changes where a selection of proper processing strategies is
Jingna Bai, Yidong Lou, Weixing Zhang, Yaozong Zhou, Zhenyi Zhang, Chuang Shi, Jingnan Liu   +6 more
openaire   +2 more sources

What Controls the Spatial Variation in Thermal Sensitivity in a Cascades River Basin During an Extreme Heat Year?

Hydrological Processes, Volume 40, Issue 10, October 2026.
Graphical equation showing five significant predictors of thermal sensitivity derived from the top‐performing multiple linear regression (MLR) model. ABSTRACT Increasing stream temperatures resulting from climate change and consequent detrimental impacts on temperature‐dependent aquatic species have signalled the need to better understand how different
Savannah Milburn, Michael Krochta, Heejun Chang   +2 more
wiley   +1 more source

A Selective State-Space-Model Based Model for Global Zenith Tropospheric Delay Prediction

Remote Sensing
The Zenith Tropospheric Delay (ZTD) is a significant atmospheric error affecting the accuracy of the Global Navigation Satellite System (GNSS). Accurate estimation of the ZTD is essential for enhancing GNSS positioning precision and plays a critical role
Cong Yang, Xu Lin, Zhengdao Yuan, Lunwei Zhao, Jie Zhao, Yashi Xu, Jun Zhao, Yakun Han   +7 more
doaj   +1 more source

Assimilation of zenith total delays in the AROME France convective scale model: a recent assessment [PDF]

Tellus: Series A, Dynamic Meteorology and Oceanography, 2015
The impact of assimilating GPS zenith total delays (ZTD) in the convective scale model AROME is assessed over a 1-month period in summer 2013. The experimental set-up is similar to the current operational usage at Météo-France where the observing system ...
Jean-Francois Mahfouf, Furqan Ahmed, Patrick Moll, Felix N. Teferle   +3 more
doaj   +1 more source

Variation of Global Ionospheric Scintillation and Its Effect on GPS Kinematic PPP‐AR Performance During Geomagnetic Storms in Solar Cycle 25: A Statistical Analysis

Space Weather, Volume 24, Issue 10, October 2026.
Abstract Enhanced small‐scale ionospheric irregularities during geomagnetic storms can disturb Global Navigation Satellite System (GNSS) carrier‐phase tracking and are associated with reduced stability of ambiguity‐fixed precise point positioning (PPP‐AR), but their impact on kinematic positioning remains insufficiently quantified.
Dongsheng Zhao, Qichen Zhao, Shuanglei Cui, Kefei Zhang, Longjiang Li, Wang Li, Zhongchao Shi, Craig M. Hancock   +7 more
wiley   +1 more source

New Models of Zenith Tropospheric Delay for Chinese Mainland and Surrounding Areas Based on Convolutional Neural Network and Random Forest

IEEE Access
Accurate models of zenith tropospheric delay (ZTD) is crucial in meteorology as well as in navigation and positioning. In this study, we employ Convolutional Neural Network (CNN) and Random Forest (RF) models to establish six direct or compensation ...
Jiahao Zhang, Qin Liang, Yunqing Huang
doaj   +1 more source

Mapping Space Weather Induced PPP‐AR Uncertainty to UAV Power‐Line Inspection Safety Risk

Space Weather, Volume 24, Issue 10, October 2026.
Abstract Space weather can affect the reliability of satellite‐based positioning and thereby disrupt industrial operations that increasingly depend on Global Navigation Satellite System (GNSS) services. This concern is becoming more relevant with the rapid growth of the low‐altitude economy, where unmanned aerial vehicles (UAVs) are increasingly used ...
Mengfei Sun, Ning Li, Tong Liu
wiley   +1 more source

GNSS Real-Time ZTD/PWV Retrieval Based on PPP with Broadcast Ephemerides

GNSS precise point positioning (PPP) plays an important role in retrieving atmospheric water vapor values and performing numerical weather prediction. However, traditional PPP relies on real-time orbits and clocks, which require continuous internet or ...
Gen Zhang, Yantian Xu, Nannan Yang, Shuhao Liu, Zongqiu Xu, Longjiang Tang   +5 more
core   +2 more sources

Sleep Is Integral to School Health and Adolescent Wellbeing: An Evidence‐Based Call to Action

Journal of School Health, Volume 96, Issue 10, October 2026.
ABSTRACT Background Sleep is essential for healthy growth and function. Sleepiness is common in middle and high school classrooms; many adolescents struggle to receive sufficient, well‐timed sleep. Contributions to Theory We provide a discussion of theory and policy ramifications of adolescent sleep science.
Jared M. Saletin, Terra D. Ziporyn, Amy R. Wolfson, Stephanie J. Crowley   +3 more
wiley   +1 more source