Results 21 to 30 of about 176 (131)

Tropospheric delay performance for GNSS integrated water vapor estimation by using GPT2w model, ECMWF's IFS operational model and in situ meteorological data [PDF]

open access: yesAdvances in Geosciences, 2018
Tropospheric delay comprises one of the most important error sources in satellite navigation and is caused when radio signals broadcasted by GPS satellites propagate into the atmosphere.
C. Oikonomou   +10 more
doaj   +3 more sources

Empirical model for mean temperature for Indian zone and estimation of precipitable water vapor from ground based GPS measurements [PDF]

open access: yesAnnales Geophysicae, 2007
Estimation of precipitable water (PW) in the atmosphere from ground-based Global Positioning System (GPS) essentially involves modeling the zenith hydrostatic delay (ZHD) in terms of surface Pressure (Ps) and subtracting it from the corresponding ...
C. Suresh Raju   +3 more
doaj   +3 more sources

Optimization of GPS water vapor tomography technique with radiosonde and COSMIC historical data [PDF]

open access: yesAnnales Geophysicae, 2016
The near-real-time high spatial resolution of atmospheric water vapor distribution is vital in numerical weather prediction. GPS tomography technique has been proved effectively for three-dimensional water vapor reconstruction.
S. Ye, P. Xia, C. Cai
doaj   +3 more sources

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

open access: yesIEEE 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   +7 more
doaj   +2 more sources

Thirteen years of integrated precipitable water derived by GPS at Mario Zucchelli Station, Antarctica [PDF]

open access: yesAnnals of Geophysics, 2013
Since 1998, the Italian Antarctic Programme has been funding space geodetic activities based on the use of episodic and permanent global positioning system (GPS) observations.
Pierguido Sarti   +4 more
doaj   +3 more sources

THE DETERMINATION OF ATMOSPHERIC WATER CONTENT FROM METEOROLOGICAL AND GPS DATA [PDF]

open access: yesГеодинамика 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   +2 more
doaj   +5 more sources

Assessment of the Impact of GNSS Processing Strategies on the Long-Term Parameters of 20 Years IWV Time Series [PDF]

open access: yesRemote Sensing, 2018
Advanced processing of collected global navigation satellite systems (GNSS) observations allows for the estimation of zenith tropospheric delay (ZTD), which in turn can be converted to the integrated water vapour (IWV).
Zofia Baldysz   +3 more
doaj   +2 more sources

Improving atmospheric pressure vertical correction model using Gaussian function [PDF]

open access: yesGeodesy and Geodynamics
The Zenith Hydrostatic Delay (ZHD) is essential for high-precision Global Navigation Satellite System (GNSS) and Very Long Baseline Interferometry (VLBI) data processing.
Baoshuang Zhang   +8 more
doaj   +2 more sources

Tropospheric products of the second GOP European GNSS reprocessing (1996–2014) [PDF]

open access: yesAtmospheric Measurement Techniques, 2017
In this paper, we present results of the second reprocessing of all data from 1996 to 2014 from all stations in International Association of Geodesy (IAG) Reference Frame Sub-Commission for Europe (EUREF) Permanent Network (EPN) as performed at the ...
J. Dousa, P. Vaclavovic, M. Elias
doaj   +3 more sources

GNSS Precipitable Water Vapor Retrieval With the Aid of NWM Data for China

open access: yesEarth and Space Science, 2021
Global Navigation Satellite System (GNSS) has become a powerful tool for sensing precipitable water vapor (PWV), which is important in investigating long‐term climate or nowcasting.
Liangke Huang   +7 more
doaj   +1 more source

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