Results 31 to 40 of about 5,434 (212)

Estimation of GNSS tropospheric products and their meteorological exploitation in Slovakia

open access: yesContributions to Geophysics and Geodesy, 2020
This paper discusses the in near–real time processing of Global Navigation Satellite System observations at the Department of Theoretical Geodesy at the Slovak University of Technology in Bratislava.
Martin Imrišek   +2 more
doaj   +1 more source

Evaluation of the ZWD/ZTD Values Derived from MERRA-2 Global Reanalysis Products Using GNSS Observations and Radiosonde Data

open access: yesSensors, 2020
Tropospheric delay is one of the main errors affecting high-precision positioning and navigation and is a key parameter of water vapor detection in the Global Navigation Satellite System (GNSS).
Liangke Huang   +5 more
doaj   +1 more source

Regional Tropospheric Correction Model from GNSS–Saastamoinen–GPT2w Data for Zhejiang Province

open access: yesAtmosphere, 2023
Tropospheric delay models based on GNSS observations are essential for studying tropospheric changes. However, the uneven distribution of GNSS stations reduces the accuracy of GNSS tropospheric delay models in remote areas.
Chaoqian Xu   +6 more
doaj   +1 more source

Analysis on the performances of the GNSS tropospheric delay correction models [PDF]

open access: yesE3S Web of Conferences, 2022
Tropospheric delay is one of the important factors affecting GNSS positioning accuracy, and there are different ways to deal with the multiple measurement situations.
Liu Jiaxi, Chang Zhanqiang, Zheng Haoxin
doaj   +1 more source

The Influence of Zenith Tropospheric Delay on PPP-RTK [PDF]

open access: yesJournal of Applied Engineering Sciences, 2016
Abstract The PPP technique is more and more used in different GPS precise application. The PPP precision is related to many factors and the most important are: the number of satellites, the ambiguity resolution, the ability to model the ionospheric and tropospheric delays, solid earth and ocean tides, relativistic effects and antenna ...
S. Nistor, A.S. Buda
openaire   +1 more source

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   +1 more source

Estimation and Evaluation of Zenith Tropospheric Delay from Single and Multiple GNSS Observations

open access: yesRemote Sensing, 2023
Multi-Global Navigation Satellite Systems (multi-GNSS) (including GPS, BDS, Galileo, and GLONASS) provide a significant opportunity for high-quality zenith tropospheric delay estimation and its applications in meteorology.
Sai Xia, Shuanggen Jin, Xuzhan Jin
doaj   +1 more source

Using GNSS Observations for Tropospheric Delay Prediction Using Artificial Intelligence [PDF]

open access: yesPort Said Engineering Research Journal, 2023
GNSS technology holds significant importance across wide applications, ranging from mapping, surveying, and precise timekeeping to ship navigation. Its operational principle hinges on the accurate measurement of signal travel time, which is crucial for ...
Ahmed Sedeek
doaj   +1 more source

Empirical modeling of tropospheric delays with uncertainty [PDF]

open access: yesGeoscientific Model Development
Accurate modeling of tropospheric delay is important for high-precision data analysis of space geodetic techniques, such as the Global Navigation Satellite System (GNSS).
J. Wang   +6 more
doaj   +1 more source

Estimating integrated water vapor trends from VLBI, GPS,and numerical weather models: sensitivity totropospheric parameterization [PDF]

open access: yes, 2018
©2018. American Geophysical UnionIn this study, we estimate integrated water vapor (IWV) trends from very long baseline interferometry (VLBI) and global navigation satellite systems (GNSS) data analysis, as well as from numerical weather models (NWMs ...
Balidakis, Kyriakos   +6 more
core   +1 more source

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