Results 41 to 50 of about 1,084 (164)

A New Global ZTD Forecast Model Based on Improved LSTM Neural Network

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Zenith tropospheric delay (ZTD), consisting of zenith hydrostatic delay (ZHD) and zenith wet delay (ZWD), is a significant contributor to errors in precise positioning using the global navigation satellite system (GNSS) precise point positioning (PPP ...
Lin He, Yibin Yao, Chaoqian Xu, Zhang Huan, Feifei Tang, Changquan Ji, Zhuoya Liu, Wentan Wu   +7 more
doaj   +1 more source

Impact of the variational assimilation of ground-based GNSS zenith total delay into AROME-Morocco model

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, Soumia Mordane, Patrick Moll, Jean-François Mahfouf, Hassnae Erraji, Zaineb Dahmane   +5 more
doaj   +1 more source

Zenith total delay study of a mesoscale convective system : GPS observations and fine-scale modelling [PDF]

Zenith Total Delay (ZTD) observations and model calculations are used to analyze a mesoscale convective system which yielded a large amount of precipitation over a short period of time in the north-western Mediterranean. ZTD observations are derived from
Cucurull, I., Rius, A., Vilà-Guerau de Arellano, J.   +2 more
core   +3 more sources

Investigating tropospheric effects and seasonal position variations in GPS and DORIS time-series from the Nepal Himalaya [PDF]

, 2009
Geodetic time-series from continuous GPS (cGPS) and 1 DORIS stations across the Himalaya of central Nepal show strong seasonal fluctuations observed on the horizontal and vertical components.
Avouac, Jean-Philippe, Bettinelli, Pierre, Flouzat, Mireille, Gautam, Umesh, Héritier, Thierry, Willis, Pascal   +5 more
core   +3 more sources

Regional Tropospheric Correction Model from GNSS–Saastamoinen–GPT2w Data for Zhejiang Province

Atmosphere, 2023
Tropospheric delay models based on GNSS observations are essential for studying tropospheric changes. However, the uneven distribution of GNSS stations reduces the accuracy of GNSS tropospheric delay models in remote areas.
Chaoqian Xu, Yiqun Zhu, Xingyu Xu, Jian Kong, Yibin Yao, Junbo Shi, Xiulong Li   +6 more
doaj   +1 more source

Research on variety characteristics of mainland China troposphere based on CMONOC

Geodesy and Geodynamics, 2018
In this research, we processed the GPS and meteorological data from about 220 stations of Crustal Movement Observation Network of China (CMONOC) observed in 2014 and derived the Zenith Total Delay (ZTD) map in both spatial and temporal dimension.
Hongbo Shi, Rui Zhang, Zhaosheng Nie, Yu Li, Zhengsong Chen, Tan Wang   +5 more
doaj   +1 more source

Estimation Precipitable Water Vapor Using (PWV) The Permanent Single GPS Station in Makasar and Bitung, Indonesia

Journal of Applied Geospatial Information, 2022
Meteorological investigations using global positioning systems (GPS) are based on permanent networks that are expensive to develop globally on Earth. In this study, it was confirmed that a single station GPS meteorology was feasible where there was no ...
Syachrul Arief
doaj   +1 more source

Evaluation of the atmospheric water vapor content in a regional climate model using ground-based GPS measurements [PDF]

, 2013
Ground-based GPS measurements can provide independent data for the assessment of climate models. We use the atmospheric integrated water vapor (IWV) obtained from GPS measurements at 99 European sites to evaluate the regional Rossby Centre Atmospheric ...
Elgered, Gunnar, Johansson, Jan M., Ning, Tong, Willén, Ulrika   +3 more
core   +1 more source

A Novel Robust High‐Precision Ionospheric Delay Modeling for PPP‐RTK Using Crowdsourced Data

Space Weather, Volume 24, Issue 2, February 2026.
Abstract The performance of PPP‐RTK is critically dependent on the quality of ionospheric corrections derived from a reference network. While the proliferation of mass‐market Global Navigation Satellite System (GNSS) devices offers a promising crowdsourcing opportunity to densify or replace this infrastructure, it introduces the formidable challenge of
Bo Wang, Jiaxi Zhu, Zhilu Wu, Dejin Zhang, Zhao Li, Minsi Ao, Shengfeng Gu   +6 more
wiley   +1 more source

Atmospheric Water Vapor and Precipitation Coupling in Southwestern South America

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract Most studies linking atmospheric water vapor and precipitation emphasize short records, tropical regions, or the Northern Hemisphere. Long‐term variability of water vapor and its coupling with precipitation remain poorly understood across strong latitudinal and climatic gradients.
Raúl Valenzuela, Jorge Jara, Cristian Martinez‐Villalobos   +2 more
wiley   +1 more source