Results 21 to 30 of about 409 (165)

The Zenith Total Delay Combination of International GNSS Service Repro3 and the Analysis of Its Precision

Remote Sensing
Currently, ground-based global navigation satellite system (GNSS) techniques have become widely recognized as a reliable and effective tool for atmospheric monitoring, enabling the retrieval of zenith total delay (ZTD) and precipitable water vapor (PWV ...
Qiuying Huang, Xiaoming Wang, Haobo Li, Jinglei Zhang, Zhaowei Han, Dingyi Liu, Yaping Li, Hongxin Zhang   +7 more
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Tropospheric delay efficiency from CSRS-PPP online service for meteorologists in Iran [PDF]

Numerical Methods in Civil Engineering, 2021
Earth’s tropospheric delay is a valuable parameter in meteorological and climatic applications and studies such as short-term weather forecasting, monitoring of severe weather conditions, and long-term climate change.
A. Sam Khaniani, S. Farzaneh
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GPS Zenith Total Delays and Precipitable Water in comparison with special meteorological observations in Verona (Italy)during MAP-SOP

Annals of Geophysics, 2002
Continuous meteorological examination of the Pre-Alpine zones in Northern Italy (Po Valley)is important for determination of atmospheric water cycles connected with floods and rainfalls.During a special meteorological observing period (MAP-SOP ...
S. Corradini, R. Santangelo, S. Pugnaghi, L. Lombroso, P. Frontero, S. Fazlagic, M. Boccolari, S. Teggi   +7 more
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HGPT2: An ERA5-Based Global Model to Estimate Relative Humidity

Remote Sensing, 2021
The neutral atmospheric delay is one of the major error sources in Space Geodesy techniques such as Global Navigation Satellite Systems (GNSS), and its modeling for high accuracy applications can be challenging.
Pedro Mateus, Virgílio B. Mendes, Sandra M. Plecha   +2 more
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Monitoring Zenithal Total Delays over the three different climatic zones from IGS GPS final products: A comparison between the use of the VMF1 and GMF mapping functions

Geodesy and Geodynamics, 2019
The International GNSS Service (IGS) final products (ephemeris and clocks-correction) have made the GNSS an indispensable low-cost tool for scientific research, for example sub-daily atmospheric water vapor monitoring.
Benachour Labib, Jianguo Yan, Jean-Pierre Barriot, Fangzhao Zhang, Peng Feng   +4 more
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Tropospheric Second-Order Horizontal Gradient Modeling for GNSS PPP

Remote Sensing, 2022
The asymmetric delay has a considerable impact on Global Navigation Satellite Systems (GNSS) Positioning, Navigation and Timing (PNT) applications. In GNSS analyses, the impacts of the asymmetric delay are commonly compensated by using the classical ...
Yaozong Zhou, Yidong Lou, Weixing Zhang, Peida Wu, Jingna Bai, Zhenyi Zhang   +5 more
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Development of a ZTD Vertical Profile Model Considering the Spatiotemporal Variation of Height Scale Factor with Different Reanalysis Products in China

Atmosphere, 2022
Tropospheric delay is one of the key factors that may affect high-precision satellite navigation and positioning and water vapor retrieval performance.
Xin Wang, Ge Zhu, Liangke Huang, Haoyu Wang, Yunzhen Yang, Junyu Li, Ling Huang, Lv Zhou, Lilong Liu   +8 more
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Tropospheric Delay Parameter Estimation Strategy in BDS Precise Point Positioning

Remote Sensing, 2023
Tropospheric delay (TD) parameter estimation is a critical issue underlying high-precision data processing for global navigation satellite systems (GNSSs).
Zhimin Liu, Yan Xu, Xing Su, Cuilin Kuang, Bin Wang, Guangxing Wang, Hongyang Ma   +6 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, M. Bender, M. Ramatschi, G. Dick, J. Wickert, A. Raabe, R. Galas   +6 more
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Precipitable Water Vapour and Zenith Total Delay time series and models over Slovakia and vicinity

Contributions to Geophysics and Geodesy, 2010
More than 50 permanent GNSS (Global Navigation Satellite Systems) stations are processed continually within the Central European Permanent Network. Zenith Total Delay (ZTD), one of the processing outputs, reflects a delay of the GNSS signal caused by ...
Miroslava IGONDOVÁ, Dušan CIBULKA
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