Results 61 to 70 of about 506 (156)

Long-term ground-based GNSS-derived ZTD trends for climate

, 2023
The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)
Santos, Marcelo, Balidakis, Kyriakos, Klos, Anna, Pacione, Rosa, Rees, Jordan   +4 more
openaire   +2 more sources

Riverine Isoscapes Modeling in the Yangtze River Basin, China: Insights Into Basin Processes and Source‐Water Contributions

Water Resources Research, Volume 61, Issue 9, September 2025.
Abstract The utilization of surface water isoscapes facilitates the characterization of source‐water contributions and hydrological processes within a basin. However, intricate river network topology poses significant challenges in applying this approach to large and complex basins.
Mengyao Ding, Huawu Wu, Ruiyu Lei, Hongxiang Fan, Jing Li, Kaiwen Li, Qing Zhu, Rongrong Wan, Congsheng Fu   +8 more
wiley   +1 more source

A New Zenith Tropospheric Delay Grid Product for Real-Time PPP Applications over China

Sensors, 2017
Tropospheric delay is one of the major factors affecting the accuracy of electromagnetic distance measurements. To provide wide-area real-time high precision zenith tropospheric delay (ZTD), the temporal and spatial variations of ZTD with altitude were ...
Yidong Lou, Jinfang Huang, Weixing Zhang, Hong Liang, Fu Zheng, Jingnan Liu   +5 more
doaj   +1 more source

Accuracy Assessment and Rainfall Intensity Response Mechanisms in GNSS Real‐Time PPP Water Vapor Retrieval: Coupling Effects of Multi‐Source Real‐Time Products and Meteorological Conditions

Earth and Space Science, Volume 12, Issue 9, September 2025.
Abstract The Global Navigation Satellite System (GNSS) real‐time Precise Point Positioning (PPP) technology offers a highly efficient approach for atmospheric Precipitable Water Vapor (PWV) monitoring and extreme weather warning. However, its retrieval accuracy is limited by the performance of orbit and clock products, as well as the coupling effects ...
Wenliang Gao, Guigen Nie, Yu Guo, Jiaqi Shi, Shuguang Wu   +4 more
wiley   +1 more source

Regional Tropospheric Delay Prediction Model Based on LSTM-Enhanced Encoder Network

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Precise modeling of zenith tropospheric delay (ZTD) is essential for real-time high-precision positioning in global navigation satellite systems. Due to the stochastic variability of atmospheric water vapor across different regions, tropospheric delay ...
Yuanfang Peng, Chenglin Cai, Zexian Li, Kaihui Lv, Xue Zhang, Yihao Cai   +5 more
doaj   +1 more source

Improving Species Distribution Models for Stream Networks by Incorporating Spatial Autocorrelation in Multi‐Sourced Datasets: A Range‐Wide Assessment of Idaho Giant Salamander Status and Future Risk

Diversity and Distributions, Volume 31, Issue 9, September 2025.
ABSTRACT Aim Fundamental to species conservation efforts is the development of accurate distribution models. Doing so is challenging for many stream organisms, where limited funding may necessitate the compilation of incidental observations from multiple sources which lack an overall sampling design and are often spatially clustered. We demonstrate the
Daniel J. Isaak, Michael Dumelle, Dona L. Horan, Daniel H. Mason, Thomas W. Franklin, David E. Nagel, Jay M. Ver Hoef, Michael K. Young   +7 more
wiley   +1 more source

EFFECTS OF OCEAN TIDE MODELS ON GNSS-ESTIMATED ZTD AND PWV IN TURKEY [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
Global Navigation Satellite System (GNSS) observations can precisely estimate the total zenith tropospheric delay (ZTD) and precipitable water vapour (PWV) for weather prediction and atmospheric research as a continuous and all-weather technique. However,
G. Gurbuz, S. Jin, C. Mekik
doaj   +1 more source

Heterointerface‐Modulated Synthetic Synapses Exhibiting Complex Multiscale Plasticity

Advanced Science, Volume 12, Issue 30, August 14, 2025.
An asymmetric dual‐gate heterointerface‐regulated artificial synapse (HRAS) is developed, employing distinct ion concentrations and dielectric coupling to form precise dual‐interface channels. Through lateral modulation, HRAS realizes, for the first time, the intricate interplay of lateral inhibition/enhancement and multi‐level short‐ and long‐term ...
Xingji Liu, Yao Ni, Zujun Wang, Sunfu Wei, Xiao′en Chen, Jingjie Lin, Lu Liu, Boyang Yu, Yue Yu, Dengyun Lei, Yayi Chen, Jianfeng Zhang, Jing Qi, Wei Zhong, Yuan Liu   +14 more
wiley   +1 more source

The VMD-Informer-BiLSTM-EAA Hybrid Model for Predicting Zenith Tropospheric Delay

Remote Sensing
Zenith Tropospheric Delay (ZTD) is a significant source of atmospheric error in the Global Navigation Satellite System (GNSS). Developing a high-accuracy ZTD prediction model is essential for both GNSS positioning and GNSS meteorology.
Zhengdao Yuan, Xu Lin, Yashi Xu, Ruiting Dai, Cong Yang, Lunwei Zhao, Yakun Han   +6 more
doaj   +1 more source

Mesoscale GPS Zenith Delay assimilation during a Mediterranean heavy precipitation event [PDF]

Advances in Geosciences, 2008
The impact of assimilating Zenith Total delay (ZTD) observations from a mesoscale ground-based GPS network over Western Europe is evaluated for the heavy precipitation event of 5–9 September 2005 over Southern France.
X. Yan, V. Ducrocq, P. Poli, G. Jaubert, A. Walpersdorf   +4 more
doaj