Results 21 to 30 of about 1,305 (202)

Development and evaluation of the refined zenith tropospheric delay (ZTD) models [PDF]

Satellite Navigation, 2021
The tropospheric delay is a significant error source in Global Navigation Satellite System (GNSS) positioning and navigation. It is usually projected into zenith direction by using a mapping function.
Fei Yang, Xiaolin Meng, Jiming Guo, Debao Yuan, Ming Chen   +4 more
doaj   +2 more sources

Empirical modeling of tropospheric delays with uncertainty [PDF]

Geoscientific Model Development
Accurate modeling of tropospheric delay is important for high-precision data analysis of space geodetic techniques, such as the Global Navigation Satellite System (GNSS).
J. Wang, J. Wang, J. Wang, J. Chen, J. Chen, J. Chen, Y. Zhang   +6 more
doaj   +2 more sources

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

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. We propose an improved zenith tropospheric delay (ZTD) modeling method whereby the piecewise model of the atmospheric refractivity is introduced ...
Liu Yang 0024, Jingxiang Gao, Dantong Zhu, Nanshan Zheng, Zengke Li   +4 more
openaire   +3 more sources

A New Zenith Tropospheric Delay Grid Product for Real-Time PPP Applications over China. [PDF]

Sensors (Basel), 2017
Tropospheric delay is one of the major factors affecting the accuracy of electromagnetic distance measurements. To provide wide-area real-time high precision zenith tropospheric delay (ZTD), the temporal and spatial variations of ZTD with altitude were ...
Lou Y, Huang J, Zhang W, Liang H, Zheng F, Liu J.   +5 more
europepmc   +2 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

Analysis on the performances of the GNSS tropospheric delay correction models [PDF]

E3S Web of Conferences, 2022
Tropospheric delay is one of the important factors affecting GNSS positioning accuracy, and there are different ways to deal with the multiple measurement situations.
Liu Jiaxi, Chang Zhanqiang, Zheng Haoxin
doaj   +1 more source

Tropospheric delay performance for GNSS integrated water vapor estimation by using GPT2w model, ECMWF's IFS operational model and in situ meteorological data [PDF]

Advances in Geosciences, 2018
Tropospheric delay comprises one of the most important error sources in satellite navigation and is caused when radio signals broadcasted by GPS satellites propagate into the atmosphere.
C. Oikonomou, F. Tymvios, F. Tymvios, C. Pikridas, S. Bitharis, K. Balidakis, S. Michaelides, H. Haralambous, H. Haralambous, D. Charalambous, D. Charalambous   +10 more
doaj   +1 more source

Evaluation of Zenith Tropospheric Delay Derived from ERA5 Data over China Using GNSS Observations

Remote Sensing, 2020
The latest reanalysis of the European Center for Medium-Range Weather Forecasts (ECMWF), ERA5, can provide atmospheric data for calculating Zenith Tropospheric Delay (ZTD) with hourly temporal resolution, which is a key factor in Global Navigation ...
Chunhua Jiang, Tianhe Xu, Shuaimin Wang, Wenfeng Nie, Zhangzhen Sun   +4 more
doaj   +1 more source

Using GNSS Observations for Tropospheric Delay Prediction Using Artificial Intelligence [PDF]

Port Said Engineering Research Journal, 2023
GNSS technology holds significant importance across wide applications, ranging from mapping, surveying, and precise timekeeping to ship navigation. Its operational principle hinges on the accurate measurement of signal travel time, which is crucial for ...
Ahmed Sedeek
doaj   +1 more source

Effects of the High-Order Ionospheric Delay on GPS-Based Tropospheric Parameter Estimations in Turkey

Remote Sensing, 2020
The tropospheric delay and gradients can be estimated using Global Positioning System (GPS) observations after removing the ionospheric delay, which has been widely used for atmospheric studies and forecasting.
Volkan Akgul, Gokhan Gurbuz, Senol Hakan Kutoglu, Shuanggen Jin   +3 more
doaj   +1 more source