Airborne Coherent GNSS Reflectometry and Zenith Total Delay Estimation over Coastal Waters
Remote Sensing, 2022 High-precision GNSS (global navigation satellite e system) measurements can be used for remote sensing and nowadays play a significant role in atmospheric sounding (station data, radio occultation observations) and sea surface altimetry based on ...
Mario Moreno +6 more
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An Improved Model for Detecting Heavy Precipitation Using GNSS-Derived Zenith Total Delay Measurements [PDF]
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 In recent years, precipitable water vapor has been widely used in heavy precipitation prediction, which is obtained from a conversion of the zenith total delay (ZTD) of the GNSS signal.
Haobo Li +8 more
doaj +5 more sources
A Global Conversion Factor Model for Mapping Zenith Total Delay onto Precipitable Water [PDF]
Remote Sensing, 2022 The conversion factor is a key parameter for converting zenith wet delays (ZWD) into precipitable water vapour (PWV) with a mean value of 0.15, and the traditional method of calculating it is to model the weighted average temperature in the process of ...
Qingzhi Zhao +8 more
doaj +3 more sources
Impact of the variational assimilation of ground-based GNSS zenith total delay into AROME-Morocco model [PDF]
Tellus: Series A, Dynamic Meteorology and Oceanography, 2020 The impact of assimilating zenith total delay (ZTD) observations from the Moroccan ground-based Global Navigation Satellite System (GNSS) network into the high-resolution operational model AROME-Morocco (2.5 km) is assessed over one month.
Fatima Zahra Hdidou +5 more
doaj +3 more sources
Remote SensingCurrently, 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 +7 more
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Frontiers in Earth Science, 2020 Atmospheric Phase Screens (APSs) derived from Interferometric Synthetic Aperture Radar (InSAR) observations contain the difference between the tropospheric water-vapor-induced delay of two acquisition epochs, i.e., the slave and the master (or reference)
Agostino N. Meroni +12 more
doaj +2 more sources
GPS – Zenith Total Delay assimilation in different resolution simulations of a heavy precipitation event over southern France [PDF]
Advances in Science and Research, 2017 The aim of this study is to investigate the different pathways of the interaction between an improved atmospheric moisture distribution by Data Assimilation (DA) of Global Positioning System Zenith Total Delays (GPS-ZTD) on the simulation of a ...
A. Caldas-Álvarez, S. Khodayar, O. Bock
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Regional zenith tropospheric delay prediction using DBO-optimized CNN-LSTM with multihead attention. [PDF]
Sci RepZenith Total Delay (ZTD) is integral to applications such as atmospheric water vapor inversion and precise positioning in the Global Navigation Satellite System (GNSS).
Yang R, Yang X, Xie S, Yu X.
europepmc +2 more sources
An Interferometric Synthetic Aperture Radar Tropospheric Delay Correction Method Based on a Global Navigation Satellite System and a Backpropagation Neural Network: More Suitable for Areas with Obvious Terrain Changes [PDF]
Sensors, 2023 Atmospheric delay correction remains a major challenge for interferometric synthetic aperture radar (InSAR) technology. In this paper, we first reviewed several commonly used methods for tropospheric delay correction in InSAR.
Liangcai Qiu +5 more
doaj +2 more sources
Machine learning-based modelling of zenith wet delay using terrestrial meteorological data in the Brazilian territory [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information SciencesThe Zenith Total Delay (ZTD) is one of the primary error sources derived from the neutral atmosphere associated with the GNSS (Global Navigation Satellite Systems) technique.
A. M. Albuquerque +7 more
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