Results 41 to 50 of about 1,091 (164)

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

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

Investigating the Inter-Relationships among Multiple Atmospheric Variables and Their Responses to Precipitation

Atmosphere, 2023
In this study, a comprehensive investigation into the inter-relationships among twelve atmospheric variables and their responses to precipitation was conducted. These variables include two Global Navigation Satellite Systems (GNSS) tropospheric products,
Haobo Li, Suelynn Choy, Safoora Zaminpardaz, Brett Carter, Chayn Sun, Smrati Purwar, Hong Liang, Linqi Li, Xiaoming Wang   +8 more
doaj   +1 more source

Estimating the impact of Global Navigation Satellite System horizontal delay gradients in variational data assimilation [PDF]

, 2018
We developed operators to assimilate Global Navigation Satellite System (GNSS) Zenith Total Delays (ZTDs) and horizontal delay gradients into a numerical weather model. In this study we experiment with refractivity fields derived from the Global Forecast
Dick, Galina, Douša, Jan, Kačmařík, Michal, Václavovic, Pavel, Wickert, Jens, Zus, Florian   +5 more
core   +2 more sources

An accurate method to correct atmospheric phase delay for InSAR with the ERA5 global atmospheric model [PDF]

, 2019
Differential SAR Interferometry (DInSAR) has proven its unprecedented ability and merits of monitoring ground deformation on a large scale with centimeter to millimeter accuracy.
Hu, Zhongbo, Mallorquí Franquet, Jordi Joan   +1 more
core   +2 more sources

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

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

Precipitable Water Vapour Estimation from GNSS Observations: Methodology and Evaluation during a High-Precipitation Month in Santa Maria (RS) [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Precipitable Water Vapour (PWV) represents the total amount of water vapour contained in a vertical column of the atmosphere that is available for precipitation.
A. M. Albuquerque, T. A. F. Gouveia, D. B. M. Alves   +2 more
doaj   +1 more source

TOMO4D Operator for Assimilation of GNSS Tomography‐Derived Water Vapor Fields Into the WRFDA 4DVAR System to Improve Regional Rainfall Forecasting

Journal of Advances in Modeling Earth Systems, Volume 18, Issue 4, April 2026.
Abstract Accurate representation of atmospheric water vapor is crucial for improving numerical weather prediction, particularly over regions with complex topography and sparse observation networks. Although assimilation of Global Navigation Satellite System (GNSS)‐derived integrated products such as zenith total delay or precipitable water vapor can ...
Arash Tayfehrostami, Yazdan Amerian, Saeed Izanlou, Majid Azadi   +3 more
wiley   +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