Results 21 to 30 of about 510 (175)
Atmosphere, 2022 The water vapor content in the atmosphere is highly correlated with rainfall events, which can be used as a data source for rainfall prediction or drought monitoring.
Lewen Zhao, Mingxuan Cui, Jia Song
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Statistical significance of trends in Zenith Wet Delay from re-processed GPS solutions [PDF]
GPS Solutions, 2018 Long series of Zenith Wet Delay (ZWD) obtained as part of a homogeneous re-processing of Global Positioning System solutions constitute a reliable set of data to be assimilated into climate models. The correct stochastic properties, i.e. the noise model of these data, have to be identified to assess the real value of ZWD trend uncertainties since ...
Anna Klos +5 more
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Satellite Navigation, 2023 Tropospheric delay is a major error caused by atmospheric refraction in Global Navigation Satellite System (GNSS) positioning. The study evaluates the potential of the European Centre for Medium-range Weather Forecast (ECMWF) Reanalysis 5 (ERA5 ...
Ifechukwu Ugochukwu Nzelibe +2 more
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Modeling tropospheric zenith wet delays in the Chinese mainland based on machine learning
GPS Solutions, 2022 Abstract The neutral atmospheric refraction effect is one of the main error sources in the analyses of space geodetic data and its modeling is still limited due to the high variations of the atmospheric water vapor. In this study, the tropospheric zenith wet delay (ZWD) modeling was realized based on the nonlinear regression analysis of 7 years
Qinzheng Li +2 more
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Estimation of Precipitable Water Vapor Using the GPS [PDF]
Journal of Astronomy and Space Sciences, 1999 The radio waves transmitted from GPS satellites is delayed by the troposphere as they propagate to Earth-based GPS receivers. The troposphere delay is usually divided into two parts, the dry delay due to the atmospheric gases and the wet delay due to the
Yong-Jin Moon +2 more
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GPS tomography: validation of reconstructed 3-D humidity fields with radiosonde profiles [PDF]
Annales Geophysicae, 2013 Water vapor plays an important role in meteorological applications; GeoForschungsZentrum (GFZ) therefore developed a tomographic system to derive 3-D distributions of the tropospheric water vapor above Germany using GPS data from about 300 ground ...
M. Shangguan +6 more
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INVESTIGATION OF THE AIR QUALITY CHANGE EFFECT ON GNSS SIGNALS [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017 Air pollution is the most important environmental problem in Zonguldak city center. Since bituminous coal is used for domestic heating in houses and generating electricity in thermal power plants, particulate matter (PM10) is the leading air pollutant ...
G. Gurbuz, K. S. Gormus, U. Altan
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Geoid, 2021 Global Navigation Satellite System (GNSS) semakin dikembangkan sebagai sistem penginderaan jauh atmosfer, salah satunya melalui perhitungan Zenith Tropospheric Delay (ZTD).
Norma Aji Cemara Mannani +1 more
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Earth and Space Science, 2019 Tropospheric delay is an important error source in Global Navigation Satellite System (GNSS) positioning and can also be used in water vapor monitoring.
Zhangyu Sun, Bao Zhang, Yibin Yao
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Remote Sensing, 2022 The prior zenith hydrostatic delay (ZHD) is an essential parameter for the Global Navigation Satellite System (GNSS) and very long baseline interferometry (VLBI) high-precision data processing. Meanwhile, the precise ZHD facilitates the separation of the
Junyu Li +5 more
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