Results 21 to 30 of about 525 (158)

Zenith Wet Delay (ZWD) Seasonal Correlation with Rainfall in Cikapundung River Discharge, North Bandung Region, Indonesia [PDF]

E3S Web of Conferences, 2019
In a GPS survey study, the biases produced by the ionosphere and troposphere layers are known as ionospheric biases and troposphere bias. The distance deviation due to the slowing travel time of GPS signals in troposphere is commonly referred to as ...
Kuntjoro Wedyanto, Wijaya D.D., Pramansyah A., Tanuwijaya Z.A.J., Pradipta Dhota   +4 more
doaj   +1 more source

An ERA5-Based Hourly Global Pressure and Temperature (HGPT) Model

Remote Sensing, 2020
The Global Navigation Satellite System (GNSS) meteorology contribution to the comprehension of the Earth’s atmosphere’s global and regional variations is essential.
Pedro Mateus, João Catalão, Virgílio B. Mendes, Giovanni Nico   +3 more
doaj   +1 more source

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
doaj   +1 more source

Prediction of tropospheric wet delay by an artificial neural network model based on meteorological and GNSS data

Engineering Science and Technology, an International Journal, 2020
Estimation of tropospheric wet delay is of great importance for real-time weather forecasting applications. In the last decade, based on troposphere wet delays obtained from Global Navigation Satellite System observations, high temporal and spatial ...
Mahmut Oguz Selbesoglu
doaj   +1 more source

Modeling tropospheric zenith wet delays in the Chinese mainland based on machine learning

GPS Solutions, 2022
Abstract The neutral atmospheric refraction effect is one of the main error sources in the analyses of space geodetic data and its modeling is still limited due to the high variations of the atmospheric water vapor. In this study, the tropospheric zenith wet delay (ZWD) modeling was realized based on the nonlinear regression analysis of 7 years
Qinzheng Li, Linguo Yuan, Zhongshan Jiang   +2 more
openaire   +1 more source

Tropospheric delay performance for GNSS integrated water vapor estimation by using GPT2w model, ECMWF's IFS operational model and in situ meteorological data [PDF]

Advances in Geosciences, 2018
Tropospheric delay comprises one of the most important error sources in satellite navigation and is caused when radio signals broadcasted by GPS satellites propagate into the atmosphere.
C. Oikonomou, F. Tymvios, F. Tymvios, C. Pikridas, S. Bitharis, K. Balidakis, S. Michaelides, H. Haralambous, H. Haralambous, D. Charalambous, D. Charalambous   +10 more
doaj   +1 more source

Estimation of Precipitable Water Vapor Using the GPS [PDF]

Journal of Astronomy and Space Sciences, 1999
The radio waves transmitted from GPS satellites is delayed by the troposphere as they propagate to Earth-based GPS receivers. The troposphere delay is usually divided into two parts, the dry delay due to the atmospheric gases and the wet delay due to the
Yong-Jin Moon, Kyu-Hong Choi, Pil-Ho Park   +2 more
doaj  

An Improved Strategy for Real-Time Troposphere Estimation and Its Application in the Severe Weather Event Monitoring

Atmosphere, 2022
The water vapor content in the atmosphere is highly correlated with rainfall events, which can be used as a data source for rainfall prediction or drought monitoring.
Lewen Zhao, Mingxuan Cui, Jia Song
doaj   +1 more source

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 Sciences
The 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, R. S. Nespolo, A. M. G. Tommaselli, R. P. Martins-Neto, N. N. Imai, D. B. M. Alves, T. A. F. Gouveia, G. O. Jerez   +7 more
doaj   +1 more source

Assessment of GNSS zenith tropospheric delay responses to atmospheric variables derived from ERA5 data over Nigeria

Satellite Navigation, 2023
Tropospheric delay is a major error caused by atmospheric refraction in Global Navigation Satellite System (GNSS) positioning. The study evaluates the potential of the European Centre for Medium-range Weather Forecast (ECMWF) Reanalysis 5 (ERA5 ...
Ifechukwu Ugochukwu Nzelibe, Herbert Tata, Timothy Oluwadare Idowu   +2 more
doaj   +1 more source