Results 21 to 30 of about 200 (130)

Machine learning-based modelling of zenith wet delay using terrestrial meteorological data in the Brazilian territory [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
The Zenith Total Delay (ZTD) is one of the primary error sources derived from the neutral atmosphere associated with the GNSS (Global Navigation Satellite Systems) technique.
A. M. Albuquerque, R. S. Nespolo, A. M. G. Tommaselli, R. P. Martins-Neto, N. N. Imai, D. B. M. Alves, T. A. F. Gouveia, G. O. Jerez   +7 more
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A new vertical reduction model for enhancing the interpolation accuracy of VMF1/VMF3 tropospheric delay products [PDF]

Geoscientific Model Development
Grid-wise Vienna Mapping Functions 1 (VMF1) and Vienna Mapping Functions 3 (VMF3) tropospheric products are widely used to interpolate the a priori zenith hydrostatic delay (ZHD) and zenith wet delay (ZWD) over GNSS (Global Navigation Satellite Systems ...
P. Sun, K. Zhang, K. Zhang, D. Zhu, S. Shi, X. Liu, D. Zhao, M. Zhang, S. Wu   +8 more
doaj   +1 more source

Short-Term PM2.5 Concentration Prediction by Combining GNSS and Meteorological Factors

IEEE Access, 2020
With the development of industrialization, fine particulate matter (PM2.5) severely chills the health of people. Studies have shown that the variation of PM2.5 concentration is related to the Global Navigation Satellite System (GNSS) tropospheric delay ...
Hongfeng Wen, Yamin Dang, Liwei Li
doaj   +1 more source

Comprehensive Study on the Tropospheric Wet Delay and Horizontal Gradients during a Severe Weather Event

Remote Sensing, 2022
GNSS meteorology is today one of the most growing technologies to monitor severe weather events. In this paper, we present the usage of 160 GPS reference stations over the period of 14 days to monitor and track Hurricane Harvey, which struck Texas in ...
Victoria Graffigna, Manuel Hernández-Pajares, Francisco Azpilicueta, Mauricio Gende   +3 more
doaj   +1 more source

A Comprehensive Evaluation of Key Tropospheric Parameters from ERA5 and MERRA-2 Reanalysis Products Using Radiosonde Data and GNSS Measurements

Remote Sensing, 2021
Tropospheric delay is a major error source in the Global Navigation Satellite System (GNSS), and the weighted mean temperature (Tm) is a key parameter in precipitable water vapor (PWV) retrieval. Although reanalysis products like the National Centers for
Lijie Guo, Liangke Huang, Junyu Li, Lilong Liu, Ling Huang, Bolin Fu, Shaofeng Xie, Hongchang He, Chao Ren   +8 more
doaj   +1 more source

Empirical model for mean temperature and assessment of precipitable water vapor derived from GPS

Geodesy and Geodynamics, 2013
The estimation of Precipitable Water Vapor (PWV) derived from Global Positioning System (GPS) data at the IGS site WUHN is assessed by comparing with PWV obtained from radiosonde data (No.57494) in Wuhan.
Tang Yanxin, Liu Lilong, Yao Chaolong
doaj   +1 more source

Analysis on the Applicability of a K-value Model Used for Water Vapor Conversion in Western China [PDF]

E3S Web of Conferences, 2020
This paper makes use of the sounding data of 43 sounding stations located in western China from 2016 to 2019 and takes the PWV-ZWD (precipitable water vapor and Zenith wet delay) conversion coefficient K calculated via numerical integration as the ...
Yao Maohua, Zhou Wenting, Chen Xiangping
doaj   +1 more source

An improved global pressure and zenith wet delay model with optimized vertical correction considering the spatiotemporal variability in multiple height-scale factors [PDF]

Geoscientific Model Development
Atmospheric pressure and zenith wet delay (ZWD) are essential for global navigation satellite system (GNSS) tropospheric correction and precipitable water vapor (PWV) retrieval. As the development progresses of real-time GNSS kinematic technology, moving
C. Jiang, C. Jiang, C. Jiang, X. Gao, H. Zhu, S. Wang, S. Liu, S. Chen, G. Liu   +8 more
doaj   +1 more source

THE DETERMINATION OF ATMOSPHERIC WATER CONTENT FROM METEOROLOGICAL AND GPS DATA

Геодинамика и тектонофизика, 2016
The Global Positioning System (GPS) based on satellites and the networks of dual frequency receivers are actively used for geodetic and geophysical applications, as well as for studying the ionosphere and troposphere.
O. F. Lukhneva, M. G. Dembelov, A. V. Lukhnev   +2 more
doaj   +1 more source

Establishment and Evaluation of a New Meteorological Observation-Based Grid Model for Estimating Zenith Wet Delay in Ground-Based Global Navigation Satellite System (GNSS)

Remote Sensing, 2018
With the availability to high-accuracy a priori zenith wet delay (ZWD) data, the positioning efficiency of the precise point positioning (PPP) processing can be effectively improved, including accelerating the convergence time and improving the ...
Yibin Yao, Zhangyu Sun, Chaoqian Xu
doaj   +1 more source