Results 31 to 40 of about 506 (156)

Evaluation of Zenith Tropospheric Delay Derived from Ray-Traced VMF3 Product over the West African Region Using GNSS Observations

Advances in Meteorology, 2021
The growing demand for Global Navigation Satellite System (GNSS) technology has necessitated the establishment of a vast and ever-growing network of International GNSS Service (IGS) tracking stations worldwide. The IGS provides highly accurate and highly
Samuel Osah, Akwasi A. Acheampong, Collins Fosu, Isaac Dadzie   +3 more
doaj   +1 more source

An Improved Model for Detecting Heavy Precipitation Using GNSS-Derived Zenith Total Delay Measurements

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
In recent years, precipitable water vapor has been widely used in heavy precipitation prediction, which is obtained from a conversion of the zenith total delay (ZTD) of the GNSS signal.
Haobo Li, Xiaoming Wang, Suqin Wu, Kefei Zhang, Xialan Chen, Jinglei Zhang, Cong Qiu, Shaotian Zhang, Li Li   +8 more
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Accuracy Evaluation and Analysis of GNSS Tropospheric Delay Inversion from Meteorological Reanalysis Data

Remote Sensing, 2022
Accurate estimation of tropospheric delay is significant for global navigation satellite system’s (GNSS) high-precision navigation and positioning. However, due to the random and contingent changes in weather conditions and water vapor factors, the ...
Guolin Liu, Guanwen Huang, Ying Xu, Liangyu Ta, Ce Jing, Yu Cao, Ziwei Wang   +6 more
doaj   +1 more source

Calculation GNSS STD, SWD, and ZTD

, 2023
Python package for creating GNSS STD/SWD as well as modelled (GPT/VMF) ZTD Install all required packages indicated in the requirements.
openaire   +1 more source

MSE-impact of PPP-RTK ZTD estimation strategies

Advances in Space Research, 2018
In PPP-RTK network processing, the wet component of the zenith tropospheric delay (ZTD) cannot be precisely modelled and thus remains unknown in the observation equations. For small networks, the tropospheric mapping functions of different stations to a given satellite are almost equal to each other, thereby causing a near rank-deficiency between the ...
Wang, K. (author), Khodabandeh, A. (author), Teunissen, P.J.G. (author)   +2 more
openaire   +5 more sources

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

SHAtropE—A Regional Gridded ZTD Model for China and the Surrounding Areas

Remote Sensing, 2020
A regional zenith tropospheric delay (ZTD) empirical model, referred to as SHAtropE (SHanghai Astronomical observatory tropospheric delay model—Extended), is developed and provides tropospheric propagation delay corrections for users in China and ...
Junping Chen, Jungang Wang, Ahao Wang, Junsheng Ding, Yize Zhang   +4 more
doaj   +1 more source

Improved Zenith Tropospheric Delay Modeling Using the Piecewise Model of Atmospheric Refractivity

Remote Sensing, 2020
As one of the atmosphere propagation delays, the tropospheric delay is a significant error source that should be properly handled in high-precision global navigation satellite system (GNSS) applications.
Liu Yang, Jingxiang Gao, Dantong Zhu, Nanshan Zheng, Zengke Li   +4 more
doaj   +1 more source

Estimation and Evaluation of Zenith Tropospheric Delay from Single and Multiple GNSS Observations

Remote Sensing, 2023
Multi-Global Navigation Satellite Systems (multi-GNSS) (including GPS, BDS, Galileo, and GLONASS) provide a significant opportunity for high-quality zenith tropospheric delay estimation and its applications in meteorology.
Sai Xia, Shuanggen Jin, Xuzhan Jin
doaj   +1 more source

Regression models for predicting daily IGS zenith tropospheric delays in West Africa: Implication for GNSS meteorology and positioning applications

Meteorological Applications, 2021
The ability to precisely and accurately model and predict tropospheric delay is essential for precise global navigation satellite system (GNSS) and meteorological applications.
Samuel Osah, Akwasi A. Acheampong, Collins Fosu, Isaac Dadzie   +3 more
doaj   +1 more source