Results 1 to 10 of about 227 (121)

A new zenith hydrostatic delay model for real-time retrievals of GNSS-PWV [PDF]

Atmospheric Measurement Techniques, 2021
The quality of the zenith hydrostatic delay (ZHD) could significantly affect the accuracy of the zenith wet delay (ZWD) of the Global Navigation Satellite System (GNSS) signal, and from the ZWD precipitable water vapor (PWV) can be obtained.
L. Li, L. Li, S. Wu, S. Wu, K. Zhang, K. Zhang, K. Zhang, X. Wang, W. Li, W. Li, Z. Shen, Z. Shen, D. Zhu, D. Zhu, Q. He, Q. He, M. Wan, M. Wan   +17 more
doaj   +5 more sources

Determination of zenith hydrostatic delay and its impact on GNSS-derived integrated water vapor [PDF]

Atmospheric Measurement Techniques, 2017
Surface pressure is a necessary meteorological variable for the accurate determination of integrated water vapor (IWV) using Global Navigation Satellite System (GNSS).
X. Wang, X. Wang, K. Zhang, K. Zhang, S. Wu, C. He, Y. Cheng, X. Li   +7 more
doaj   +8 more sources

A Calibrated GPT3 (CGPT3) Model for the Site-Specific Zenith Hydrostatic Delay Estimation in the Chinese Mainland and Its Surrounding Areas

Remote Sensing, 2022
The prior zenith hydrostatic delay (ZHD) is an essential parameter for the Global Navigation Satellite System (GNSS) and very long baseline interferometry (VLBI) high-precision data processing. Meanwhile, the precise ZHD facilitates the separation of the
Junyu Li, Feijuan Li, Lilong Liu, Liangke Huang, Lv Zhou, Hongchang He   +5 more
doaj   +4 more sources

Analysis of GNSS-Derived Tropospheric Zenith Non-Hydrostatic Delay Anomaly during Sandstorms in Northern China on 15th March 2021

Remote Sensing, 2022
On the 15th of March 2021, the strongest sandstorm in a decade occurred in northern China, and had a great adverse impact on the natural environment and human health in northern China.
Maosheng Zhou, Jinyun Guo, Xin Liu, Rui Hou, Xin Jin   +4 more
doaj   +4 more sources

Impact of a priori zenith hydrostatic delay errors on GPS estimates of station heights and zenith total delays [PDF]

Geophysical Research Letters, 2006
Corrections to zenith atmospheric delays (including hydrostatic components) are estimated in geodetic analyses using partial derivatives that relate wet delays to the phase observations. At low‐elevation angles, partial derivatives of the hydrostatic and wet delays are sufficiently different as to cause errors in the estimates of station heights and ...
Paul Tregoning
exaly   +3 more sources

Kinematic Zenith Tropospheric Delay Estimation with GNSS PPP in Mountainous Areas [PDF]

Sensors, 2021
The use of global navigation satellite systems (GNSS) precise point positioning (PPP) to estimate zenith tropospheric delay (ZTD) profiles in kinematic vehicular mode in mountainous areas is investigated.
Paul Gratton, Simon Banville, Gérard Lachapelle, Kyle O’Keefe   +3 more
doaj   +2 more sources

Impact of a priori zenith hydrostatic delay errors on ground-based GNSS tropopause height determinations

Frontiers in Astronomy and Space Sciences
The determination of tropopause height (TPH) is crucial for atmospheric research and the improvement of Global Navigation Satellite System (GNSS) meteorological models. While TPH determination from ground-based GNSS zenith tropospheric delay (ZTD) offers
Linmiao Qin, Xianjie Li, Xianjie Li, Yidong Lou, Yidong Lou, Pengfei Xia, Pengfei Xia, Zhixuan Zhang, Zijing Liu   +8 more
doaj   +2 more sources

Hourly PWV Dataset Derived from GNSS Observations in China [PDF]

Sensors, 2019
The rapid variation of atmospheric water vapor is important for a regional hydrologic cycle and climate change. However, it is rarely investigated in China, due to the lack of a precipitable water vapor (PWV) dataset with high temporal resolution ...
Qingzhi Zhao, Pengfei Yang, Wanqiang Yao, Yibin Yao   +3 more
doaj   +2 more sources

Impact of Tropospheric Mismodelling in GNSS Precise Point Positioning: A Simulation Study Utilizing Ray-Traced Tropospheric Delays from a High-Resolution NWM

Remote Sensing, 2021
In GNSS analysis, the tropospheric delay is parameterized by applying mapping functions (MFs), zenith delays, and tropospheric gradients. Thereby, the wet and hydrostatic MF are derived under the assumption of a spherically layered atmosphere.
Florian Zus, Kyriakos Balidakis, Galina Dick, Karina Wilgan, Jens Wickert   +4 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