Results 71 to 80 of about 376 (139)

Deep Neural Networks for Refining Vertical Modeling of Global Tropospheric Delay

Geophysical Research Letters
Kinematic airborne platforms are becoming increasingly vital for Earth observation. They highlight the critical need for accurate tropospheric delay corrections across varying altitudes, especially as most existing models are limited to Earth's surface ...
Peng Yuan, Kyriakos Balidakis, Jungang Wang, Pengfei Xia, Jian Wang, Mingyuan Zhang, Weiping Jiang, Harald Schuh, Jens Wickert, Zhiguo Deng   +9 more
doaj   +1 more source

Ensemble Based Estimation of Wet Refractivity Indices Using a Functional Model Approach

Earth and Space Science
The estimation of the wet refractivity indices is crucial for applications like weather predictions or improving the accuracy of real‐time positioning techniques.
Masoud Dehvari, Saeed Farzaneh, Ehsan Forootan   +2 more
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HASH-Z: A Height-Correction Adjusted Spherical Harmonic Model for Real-Time Tropospheric Delay Correction Over China

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Precise point positioning (PPP) has become a key technique in global navigation satellite systems (GNSS) applications, but its use in real-time is limited by long convergence times.
Hao Chen, Ningbo Wang, Kefei Zhang, Tomasz Hadas, Zishen Li, Hongxing Zhang, Suqin Wu, Longjiang Li, Hang Zhong, Liang Wang   +9 more
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Measurement report: Can zenith wet delay from GNSS “see” atmospheric turbulence? Insights from case studies across diverse climate zones [PDF]

Atmospheric Chemistry and Physics
Global navigation satellite system (GNSS) microwave signals are nearly unaffected by clouds but are delayed as they travel the troposphere. The hydrostatic delay accounts for approximately 90 % of the total delay and can be modelled well as a function of
G. Kermarrec, X. Calbet, Z. Deng, C. Carbajal Henken   +3 more
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Empirical tropospheric zenith wet delay models with strong generalization capability based on a robust machine learning fusion algorithm

Geodesy and Geodynamics
Tropospheric zenith wet delay (ZWD) plays a vital role in the analysis of space geodetic observations. In recent years, machine learning methods have been increasingly applied to improve the accuracy of ZWD calculations.
Jiahao Zhang, Qin Liang, Yunqing Huang
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Serum Pharmacochemistry Combined with Network Pharmacology-Based Mechanism Prediction and Pharmacological Validation of Zhenwu Decoction on Alleviating Isoprenaline-Induced Heart Failure Injury in Rats. [PDF]

ACS Omega, 2023
Li R, Zhu L, Wu M, Tao C, Lu Y, Zhao Y, Jiang X, Zhang C, Wan L.   +8 more
europepmc   +1 more source

Analysis of Different Height Correction Models for Tropospheric Delay Grid Products over the Yunnan Mountains

Atmosphere
Accurate tropospheric delays are of great importance for both Global Navigation Satellite System (GNSS)-based positioning and precipitable water vapor monitoring.
Fangrong Zhou, Luohong Li, Yifan Wang, Zelin Dai, Chenchen Ding, Hui Li, Yunbin Yuan   +6 more
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An improved global pressure and ZWD model with optimized vertical correction considering the spatial-temporal variability of multiple height scale factors

Abstract. Atmospheric pressure and Zenith wet delay (ZWD) are essential for GNSS tropospheric correction and precipitable water vapor (PWV) retrieval. As the development progresses of real-time GNSS kinematic technology, moving platforms such as airborne and shipborne require high-quality tropospheric delay information to pre-correct errors.
Jiang, Chunhua, Gao, Xiang, Zhu, Huizhong, Wang, Shuaimin, Liu, Sixuan, Chen, Shaoni, Liu, Guangsheng   +6 more
openaire   +2 more sources

Efficacy and Safety of Zhenwu Decoction in the Treatment of Diabetic Nephropathy: A Systematic Review and Meta-Analysis. [PDF]

Evid Based Complement Alternat Med, 2022
Lv X, Zhou M, Liu X, Xiang Q, Yu R.
europepmc   +1 more source

APLICAÇÃO E AVALIAÇÃO DO MODELO DE PREVISÃO NUMÉRICA DO TEMPO ETA15KM NO POSICIONAMENTO ABSOLUTO

Revista Brasileira de Cartografia, 2014
As tecnologias espaciais têm sido amplamente empregadas para fins de posicionamento, a principal e mais moderna é o GNSS (Global Navigation Satellite System).
Pedro Augusto Giraldes de Abreu, Daniele Barroca Marra Alves, Tayná Aparecida Ferreira Gouveia   +2 more
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