Results 21 to 30 of about 506 (156)
Transformer-Based Global Zenith Tropospheric Delay Forecasting Model
Remote Sensing, 2022 Zenith tropospheric delay (ZTD) plays an important role in high-precision global navigation satellite system (GNSS) positioning and meteorology. At present, commonly used ZTD forecasting models comprise empirical, meteorological parameter, and neural ...
Huan Zhang +4 more
doaj +1 more source
Atmosphere, 2023 An accurate model of the Zenith Tropospheric Delay (ZTD) plays a crucial role in Global Navigation Satellite System (GNSS) precise positioning, water vapor retrieval, and meteorological research. Current empirical models (such as the GPT3 model) can only
Min Wei +4 more
doaj +1 more source
Kinematic ZTD Estimation from Train-Borne Single-Frequency GNSS: Validation and Assimilation [PDF]
Remote Sensing, 2021 Water vapour is one of the most important parameters utilized for the description of state and evolution of the Earth’s atmosphere. It is the most effective greenhouse gas and shows high variability, both in space and time. Thus, detailed knowledge of its distribution is of immense importance for weather forecasting, and therefore high resolution ...
Matthias Aichinger-Rosenberger +2 more
openaire +3 more sources
Remote Sensing, 2020 Global navigation satellite systems (GNSSs) have become an important tool to derive atmospheric products, such as the total zenith tropospheric delay (ZTD) and precipitable water vapor (PWV) for weather and climate studies.
Jinglei Zhang +7 more
doaj +1 more source
A global grid model for the estimation of zenith tropospheric delay considering the variations at different altitudes [PDF]
Geoscientific Model Development, 2023 The accuracy of tropospheric delay correction heavily depends on the quality of the tropospheric model, and the zenith tropospheric delay (ZTD) is an important factor affecting the tropospheric delay. Therefore, it is essential to establish a precise ZTD
L. Huang +10 more
doaj +1 more source
Assessment of ZTD derived from ECMWF/NCEP data with GPS ZTD over China
GPS Solutions, 2011 The accuracy and feasibility of computing the zenith tropospheric delays (ZTDs) from data of the European Center for Medium-Range Weather Forecasts (ECMWF) and the United States National Centers for Environmental Prediction (NCEP) are studied. The ZTDs are calculated from ECMWF/NCEP pressure-level data by integration and from the surface data with the ...
Chen, Q. +5 more
openaire +4 more sources
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 +8 more
doaj +1 more source
Modelling Systematic Residuals in Absolute ZTD Estimation from GPS [PDF]
2006 IEEE International Symposium on Geoscience and Remote Sensing, 2006 Abstract —Tropsheric delay is one of important error sources in GPS positioning and InSAR applications. Accurate measurements of ZTD (Zenith Tropospheric Delay) can be used for correcting the atmospheric delay on GPS and InSAR as well as atmospheric science research and applications (e.g. numeric weather prediction).
S. Jin +3 more
openaire +1 more source
Development and evaluation of the refined zenith tropospheric delay (ZTD) models [PDF]
Satellite Navigation, 2021 AbstractThe tropospheric delay is a significant error source in Global Navigation Satellite System (GNSS) positioning and navigation. It is usually projected into zenith direction by using a mapping function. It is particularly important to establish a model that can provide stable and accurate Zenith Tropospheric Delay (ZTD).
Fei Yang +4 more
openaire +2 more sources
Assessment of SIRGAS-CON tropospheric products using ERA5 and IGS
Journal of Geodetic Science, 2022 Zenith Tropospheric Delays (ZTDs) are used to correct tropospheric effects that cause a delay in the signal measured by Global Navigation Satellite Systems (GNSS) receivers and obtain accurate measurements.
Prado Anderson +2 more
doaj +1 more source