Results 81 to 90 of about 732,198 (160)

A Global Assessment of Diurnal Discontinuities in ERA5 Tropospheric Zenith Total Delays Using 10 Years of GNSS Data

Geophysical Research Letters, Volume 52, Issue 5, 16 March 2025.
Abstract The diurnal cycle of tropospheric Zenith Total Delays (ZTD) is critical for refining tropospheric models and understanding key geophysical and atmospheric processes. The fifth European Centre for Medium‐Range Weather Forecasts reanalysis ERA5, with its unique 1‐hr temporal resolution, provides valuable data for these purposes.
Peng Yuan, Geoffrey Blewitt, Corné Kreemer, Weiping Jiang, Tianjun Liu, Linyu He, Qiang Shan, Kyriakos Balidakis, Harald Schuh, Jens Wickert, Zhiguo Deng   +10 more
wiley   +1 more source

Real-Time Estimation of Tropospheric Delay Measurements Using a Low-Cost Weather Station Integrated With the Hopfield Model

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
This study presents preliminary results of the development of a meteorological microstation that calculates and can correct the tropospheric delay in the precise point positioning method with a global navigation satellite system (GNSS).
Vitor S. Tavares, Luiz P. S. Damaceno, Luiz V. G. Tarelho, Daniel V. Magalhaes   +3 more
doaj   +1 more source

Effect of phase centre variation on tropospheric delay in PPP‐AR with low‐cost global navigation satellite systems receiver and antenna

IET Radar, Sonar &Navigation, Volume 18, Issue 12, Page 2737-2748, December 2024.
When PCV corrections are not applied, it is clear that ambiguity resolution fails to improve the accuracy of ZWD estimates. The SEPMX5 receiver consistently outperforms the UBLX9F receiver in scenarios where PCV corrections are applied. Abstract As low‐cost global navigation satellite systems receiver and antenna become increasingly prevalent for water
Jizhong Wu, Xiaoying Wang, Hongyang Ma
wiley   +1 more source

Improving GNSS precise point positioning with tropospheric constraints from data-driven numerical weather prediction model

Geo-spatial Information Science
Accurate priori tropospheric knowledge is advantageous for Global Navigation Satellite System (GNSS) precise point positioning (PPP), which significantly influences both convergence time and the accuracy of tropospheric delay estimations.
Yuanfan Deng, Wu Chen, Junsheng Ding, Ahmed El-Mowafy, Duojie Weng, Long Tang, Lei Bai, Xiaolong Mi   +7 more
doaj   +1 more source

Grid Residual Tropospheric Corrections for Improved Differential GPS Positioning Over the Victoria GPS Network (GPSnet)

, 2004
. Tropospheric delay is one of the major error sources in GPS positioning. The delay of radio signals caused by the troposphere can range from 2 m at the zenith to 20 m at lower elevation angles.
Yanming Feng, Yi Zheng, Zheng, Yi, Zhengdong Bai, Feng, Yanming, Bai, Zhengdong   +5 more
core   +1 more source

Tropospheric Delay Parameter Estimation Strategy in BDS Precise Point Positioning

, 2023
Tropospheric delay (TD) parameter estimation is a critical issue underlying high-precision data processing for global navigation satellite systems (GNSSs).
Bin Wang, Zhimin Liu, Hongyang Ma, Xing Su, Cuilin Kuang, Guangxing Wang, Yan Xu   +6 more
core   +1 more source

Selecting ERA5 Grid Spacing for GNSS Tropospheric Parameters over China

Atmosphere
ERA5 is the fifth-generation atmospheric reanalysis from the European Centre for Medium-Range Weather Forecasts. It combines observations with a weather model to reconstruct past atmospheric conditions.
Ziyang Ding, Chao Liu, Zihan Peng, Clement Chongo, James Ngoma   +4 more
doaj   +1 more source

A new precision improvement in zenith tropospheric delay estimation by GPS

, 2005
Accurate GPS-derived ZTD (zenith tropospheric delay) plays a key role in near real-time weather forecasting, especially in improving the precision of Numerical Weather Prediction (NWP) models.
Jin, SG, Park, PH
core  

Analisis nilai Zenith Tropospheric Delay (ZTD) menggunakan Data CORS di wilayah Jawa Timur tahun 2015-2018 [PDF]

, 2020
Global Navigation Satellite System (GNSS) kini dikembangkan sebagai sistem penginderaan jauh atmosfer melalui perhitungan Zenith Tropospheric Delay (ZTD). Salah satu komponen dalam ZTD adalah Zenith Wet Delay (ZWD). ZWD dipengaruhi oleh kandungan uap air
Mannani, Norma Aji Cemara
core  

Impacts of stochastic modeling on GPS-derived ZTD estimations [PDF]

, 2004
GPS-derived ZTD (Zenith Tropospheric Delay) plays a key role in near real-time weather forecasting, especially in improving the precision of Numerical Weather Prediction (NWP) models.
Jin, S, Wang, J ; https://orcid.org/
core   +1 more source