Developing a new combined model of zenith wet delay by using neural network
Advances in Space Research, 2022exaly +2 more sources
SPATIO-TEMPORAL VARIATION OF NONLINEARITY IN TROPOSPHERIC ZENITH WET DELAY OVER WEST AFRICA
Telecommunications and Radio Engineering (English Translation of Elektrosvyaz and Radiotekhnika), 2020Ibiyinka Fuwape
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Tropospheric zenith wet delay prediction with a new hybrid ANN – Gorilla troops optimizer algorithm
Advances in Space Research, 2023Berkant Konakoğlu +2 more
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Analysis of the factors affecting the performance of Zenith Wet Delay modeling
Measurement: Journal of the International Measurement ConfederationBobin Cui, Pan Li, Jiahuan Hu
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Enhancing Tropospheric Zenith Wet Delay Interpolation With Gaussian Process Regression
IEEE Transactions on Geoscience and Remote SensingYiping Jiang, Xingqun Zhan
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A priori zenith wet delays in the analysis of VLBI CONT sessions
Advances in Space Research, 2021Abstract Tropospheric delay is one of the major sources of error in VLBI (Very Long Baseline Interferometry) analysis. The principal component of this error can be accurately computed through reliable surface pressure data —hydrostatic delay— yet there is also a small but volatile component —wet delay— which is difficult to be modelled a priori.
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Comparison of Tropospheric Zenith Wet Delay from VLBI and GNSS Estimations
2021<p>Tropospheric delay is one of the major error sources for space geodetic techniques such as Very Long Baseline Interferometry (VLBI) and Global Navigation Satellite System (GNSS). In this study, we compared the agreement of tropospheric zenith wet delay (ZWD) seasonal variations derived from VLBI and GNSS observations at 8 stations that
Vicky Jia Liu +2 more
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GPS Meteorology: Mapping Zenith Wet Delays onto Precipitable Water
Journal of Applied Meteorology, 1994Abstract Emerging networks of Global Positioning System (GPS) receivers can be used in the remote sensing of atmospheric water vapor. The time-varying zenith wet delay observed at each GPS receiver in a network can be transformed into an estimate of the precipitable water overlying that receiver.
Michael Bevis +6 more
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Development of a global model for zenith wet delays based on the random forest approach
2022<p>Tropospheric delays have been a major error source for space geodetic techniques and the performance of their modeling is significantly limited due to the high spatiotemporal variability of the moisture in the lower atmosphere. In this study, tropospheric zenith wet delay (ZWD) modeling was realized based on the machine learning ...
Qinzheng Li +3 more
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Impact of GPS antenna phase center models on zenith wet delay and tropospheric gradients
GPS Solutions, 2018Today Global Navigation Satellite Systems (GNSS) tropospheric products, such as zenith total delays (ZTD) and zenith wet delays (ZWD), are widely used as complementary data sets in numerical weather prediction models. In particular, the wet delays are treated as unknown parameters in GNSS processing and are estimated with other parameters such as ...
Ejigu, Yohannes Getachew +3 more
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