Results 61 to 70 of about 191 (136)

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
doaj   +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
doaj   +1 more source

Monitoring Zenithal Total Delays over the three different climatic zones from IGS GPS final products: A comparison between the use of the VMF1 and GMF mapping functions

Geodesy and Geodynamics, 2019
The International GNSS Service (IGS) final products (ephemeris and clocks-correction) have made the GNSS an indispensable low-cost tool for scientific research, for example sub-daily atmospheric water vapor monitoring.
Benachour Labib, Jianguo Yan, Jean-Pierre Barriot, Fangzhao Zhang, Peng Feng   +4 more
doaj   +1 more source

Establishment and analysis of global gridded Tm − Ts relationship model

Geodesy and Geodynamics, 2016
In ground-based GPS meteorology, Tm is a key parameter to calculate the conversion factor that can convert the zenith wet delay (ZWD) to precipitable water vapor (PWV).
Zeying Lan, Bao Zhang, Yichao Geng
doaj   +1 more source

A New Global ZTD Forecast Model Based on Improved LSTM Neural Network

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Zenith tropospheric delay (ZTD), consisting of zenith hydrostatic delay (ZHD) and zenith wet delay (ZWD), is a significant contributor to errors in precise positioning using the global navigation satellite system (GNSS) precise point positioning (PPP ...
Lin He, Yibin Yao, Chaoqian Xu, Zhang Huan, Feifei Tang, Changquan Ji, Zhuoya Liu, Wentan Wu   +7 more
doaj   +1 more source

An Interferometric Synthetic Aperture Radar Tropospheric Delay Correction Method Based on a Global Navigation Satellite System and a Backpropagation Neural Network: More Suitable for Areas with Obvious Terrain Changes. [PDF]

Sensors (Basel), 2023
Qiu L, Chen P, Yao Y, Chen H, Tang F, Xiong M.   +5 more
europepmc   +1 more source

ZWDX: a global zenith wet delay forecasting model using XGBoost

Earth, Planets and Space
Tropospheric delays play a crucial role for Global Navigation Satellite Systems (GNSS). They are a major error source in GNSS positioning and, at the same time, also a variable of interest in GNSS meteorology.
Laura Crocetti, Matthias Schartner, Marcus Franz Wareyka-Glaner, Konrad Schindler, Benedikt Soja   +4 more
doaj   +1 more source

Analysis of Spatial Decorrelation of Small-Scale Tropospheric Delay Using High-Resolution NWP Data. [PDF]

Sensors (Basel), 2023
Håkegård JE, Sokolova N, Morrison A.
europepmc   +1 more source

Multi-GNSS-Weighted Interpolated Tropospheric Delay to Improve Long-Baseline RTK Positioning. [PDF]

Sensors (Basel), 2022
Mirmohammadian F, Asgari J, Verhagen S, Amiri-Simkooei A.   +3 more
europepmc   +1 more source

Spatial interpolation of regional PM_2.5 concentrations in China during COVID-19 incorporating multivariate data. [PDF]

Atmos Pollut Res, 2023
Wei P, Xie S, Huang L, Liu L, Cui L, Tang Y, Zhang Y, Meng C, Zhang L.   +8 more
europepmc   +1 more source