Results 1 to 10 of about 2,145,064 (260)

A Regional Zenith Tropospheric Delay (ZTD) Model Based on GPT3 and ANN

Remote Sensing, 2021
The delays of radio signals transmitted by global navigation satellite system (GNSS) satellites and induced by neutral atmosphere, which are usually represented by zenith tropospheric delay (ZTD), are required as critical information both for GNSS ...
Fei Yang, Jiming Guo, Chaoyang Zhang, Yitao Li, Jun Li   +4 more
semanticscholar   +3 more sources

Determination of Tropospheric Parameters from ERA Surface Data for Space Geodetic Techniques

Remote Sensing, 2021
This study investigates methods of deriving meteorological parameters needed in space geodetic applications, from the surface data of the numerical weather model (NWM).
Wei Li, Yujin He
doaj   +1 more source

THE EFFECT OF SEASONAL VARIATION ON GNSS ZENITH TROPOSPHERIC DELAY [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
The Global Navigation Satellite System (GNSS) signal experiences delays caused by the atmosphere, leading to the lengthening of the geometric path of the ray, commonly referred to as tropospheric delay. This delay is a significant source of error in GNSS
N. Tekin Ünlütürk, U. Doğan
doaj   +1 more source

Estimating Zenith Tropospheric Delays from BeiDou Navigation Satellite System Observations [PDF]

Sensors, 2013
The GNSS derived Zenith Tropospheric Delay (ZTD) plays today a very critical role in meteorological study and weather forecasts, as ZTDs of thousands of GNSS stations are operationally assimilated into numerical weather prediction models. Recently, the Chinese BeiDou Navigation Satellite System (BDS) was officially announced to provide operational ...
Xu, A., Xu, Z., Ge, M., Xu, X., Zhu, H., Sui, X.   +5 more
openaire   +6 more sources

Troposphere Delay Remote Sensing Using Single GPS Receiver

Journal of Engineering Research, 2022
The most prominent spatially correlated errors in GNSS observations are well known to be atmospheric effects. The ionosphere and troposphere are the two main layers of the Atmosphere that cause delays in GNSS observations. A linear combination of the dual-frequency data can be used to reduce ionospheric delay.
Ahmed Sedeek, Mohamed Doma, Mostafa Rabah, Ahmed Elsayed   +3 more
openaire   +1 more source

A New Method for InSAR Stratified Tropospheric Delay Correction Facilitating Refinement of Coseismic Displacement Fields of Small-to-Moderate Earthquakes

Remote Sensing, 2022
Focusing on stratified tropospheric delay correction in the small-amplitude coseismic displacement field of small-to-moderate earthquakes (
W. Gong, Dezheng Zhao, Chuanhua Zhu, Yingfeng Zhang, Chenglong Li, Guifang Zhang, X. Shan   +6 more
semanticscholar   +1 more source

Dry–Hot Compound Events Driving the 2024 Pantanal Wildfires

International Journal of Climatology, EarlyView.
Extreme wildfires in the Pantanal in 2024 were driven by a cascade of heatwaves, rainfall deficits and the absence of the annual flood pulse. These conditions dried soils and rivers, enhanced fuel accumulation and enabled early and intense fire outbreaks.
Liz B. C. Belém, Ronaldo Albuquerque, Leonardo F. Peres, Filippe L. M. Santos, Julia A. Rodrigues, Lucas S. Menezes, Patrícia S. Silva, Ricardo M. Trigo, Carlos C. DaCamara, Ana Russo, João Geirinhas, Geraldo A. Damasceno Junior, Fabio O. Roque, Ana M. B. Nunes, Renata Libonati   +14 more
wiley   +1 more source

Dynamics and model representation of two contrasting extreme precipitation events in the Sahel

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Hovmöller diagrams of the two investigated extreme precipitation events in Mali are shown for (i) IMERG observations, and ICOsahedral Nonhydrostatic model (ICON) runs with parameterization of explicit convection (ii) enabled and (iii) disabled. This work highlights that the commonly perceived benefit of using explicit convection in a state‐of‐the‐art ...
Souleymane Sanogo, Marlon Maranan, Andreas H. Fink, Beth J. Woodhams, Peter Knippertz   +4 more
wiley   +1 more source

Estimation of GNSS tropospheric products and their meteorological exploitation in Slovakia

Contributions to Geophysics and Geodesy, 2020
This paper discusses the in near–real time processing of Global Navigation Satellite System observations at the Department of Theoretical Geodesy at the Slovak University of Technology in Bratislava.
Martin Imrišek, Mária Derková, Juraj Janák   +2 more
doaj   +1 more source

Machine learning-based tropospheric delay prediction for real-time precise point positioning under extreme weather conditions

GPS Solutions
Satellite signals from the Global Navigation Satellite System (GNSS) are refracted as they pass through the troposphere, owing to the variable density and composition of the atmosphere, causing tropospheric delay. Typically, tropospheric delay is treated
Saeid Haji-Aghajany, W. Rohm, T. Hadaś, J. Bosy   +3 more
semanticscholar   +1 more source