Kinematic Zenith Tropospheric Delay Estimation with GNSS PPP in Mountainous Areas [PDF]
Sensors, 2021 The use of global navigation satellite systems (GNSS) precise point positioning (PPP) to estimate zenith tropospheric delay (ZTD) profiles in kinematic vehicular mode in mountainous areas is investigated.
Paul Gratton +3 more
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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, Xiaoming Wang, Suqin Wu
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Analysing the Zenith Tropospheric Delay Estimates in On-line Precise Point Positioning (PPP) Services and PPP Software Packages [PDF]
Sensors, 2018 As Global Navigation Satellite System (GNSS) signals travel through the troposphere, a tropospheric delay occurs due to a change in the refractive index of the medium.
Jorge Mendez Astudillo +3 more
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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
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GPS derived Zenith Total Delay (ZTD) observed at tropical locations in South India during atmospheric storms and depressions [PDF]
Journal of Atmospheric and Solar-Terrestrial Physics, 2015 Abstract Global Positioning System (GPS) monitoring of Zenith Total Delay (ZTD) of the troposphere which is related to water vapor is important as it may help us in weather forecasting. The atmospheric water vapor varies according to the season and it also varies quickly on short temporal and spatial scales during stormy periods.
A Akilan, K K Abdul Azeez, S Balaji
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Regional zenith tropospheric delay prediction using DBO-optimized CNN-LSTM with multihead attention [PDF]
Scientific ReportsZenith Total Delay (ZTD) is integral to applications such as atmospheric water vapor inversion and precise positioning in the Global Navigation Satellite System (GNSS).
Ruixue Yang +3 more
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Remote Sensing of Environment, 2020 Sentinel-1 mission with its wide spatial coverage (250 km), short revisit time (6 days), and rapid data dissemination opened new perspectives for large-scale interferometric synthetic aperture radar (InSAR) analysis. However, the spatiotemporal changes in troposphere limits the accuracy of InSAR measurements for operational deformation monitoring at a ...
Roghayeh Shamshiri +2 more
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High-Precision ZTD Model of Altitude-Related Correction
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023 Zenith tropospheric delay (ZTD) is one of the main error sources in space geodesy. The existing regional or global models, such as Global Pressure and Temperature 3 (GPT3), Global Tropospheric model, Global Hopfield, and Shanghai Astronomical observatory
Qingzhi Zhao, , Chaoqian Xu
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Assessing BeiDou-3 PPP-B2b with Signal-in-Space Ranging Error (SISRE) and Its Performances in Positioning and ZTD Estimation [PDF]
SensorsThe PPP-B2b service of BeiDou-3 enables real-time precise point positioning (RT-PPP) through correction information contained in B2b signals, circumventing the reliance on ground-based network infrastructures.
Guangxing Wang +6 more
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Assimilation of ground-based GNSS data using a local ensemble Kalman filter [PDF]
Scientific ReportsTropical cyclones become increasingly nonlinear and dynamically unstable in high-resolution models. The initial conditions are typically sub-optimal, leaving scope to improve the accuracy of forecasts with improved data assimilation.
Changliang Shao, Lars Nerger
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