Results 21 to 30 of about 5,434 (212)
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 +4 more
doaj +2 more sources
RESEARCH ON ZENITH TROPOSPHERIC DELAY MODELING OF REGIONAL CORS NETWORK [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020 By calculating the zenith troposphere information from 11 reference stations of the CORS network in Guilin City, Guangxi Province in 2018 by GAMIT10.6 as the reference values, analyzing the relationship between the zenith troposphere and the elevation ...
Y. F. Yang +4 more
doaj +3 more sources
Satellite Navigation, 2023 Tropospheric delay is a major error caused by atmospheric refraction in Global Navigation Satellite System (GNSS) positioning. The study evaluates the potential of the European Centre for Medium-range Weather Forecast (ECMWF) Reanalysis 5 (ERA5 ...
Ifechukwu Ugochukwu Nzelibe +2 more
doaj +2 more sources
Short-Term Forecast of Tropospheric Zenith Wet Delay Based on TimesNet [PDF]
SensorsThe tropospheric zenith wet delay (ZWD) serves as a pivotal parameter for atmospheric water vapour inversion. By converting it into precipitable water vapour, high-temporal-resolution atmospheric humidity monitoring becomes feasible, providing crucial ...
Xuan Zhao +5 more
doaj +2 more sources
A Novel Method for Monitoring Tropical Cyclones’ Movement Using GNSS Zenith Tropospheric Delay
Remote Sensing, 2023 Precipitable water vapor (PWV) is an important meteorological factor for predicting extreme weather events such as tropical cyclones, which can be obtained from zenith tropospheric delay (ZTD) by using a conversion.
Dajun Lian +8 more
doaj +2 more sources
Assessment of GNSS PPP-Based Zenith Tropospheric Delay [PDF]
Artificial Satellites, 2020 Abstract This study assesses the precision of zenith tropospheric delay (ZTD) obtained through triple-constellation global navigation satellite system (GNSS) precise point positioning (PPP). Various ZTD estimates are obtained as by-products from GPS-only, GPS/Galileo, GPS/BeiDou, and triple-constellation GPS/Galileo/BeiDou PPP solutions.
Mohamed Abdelazeem, Ahmed El-Rabbany
+5 more sources
Analysing the Zenith Tropospheric Delay Estimates in On-line Precise Point Positioning (PPP) Services and PPP Software Packages. [PDF]
Sensors (Basel), 2018 Mendez Astudillo J +3 more
europepmc +2 more sources
Tropospheric Delay Model Based on VMF and ERA5 Reanalysis Data
Applied Sciences, 2023 The global tropospheric zenith delay grid products of VMF1 and VMF3 (Vienna mapping functions) with different resolutions are used to calculate the tropospheric zenith delay of eight IGS (International GNSS Service) stations in China, and the accuracy of
Mengtao Zhang +4 more
doaj +1 more source
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 +4 more
doaj +1 more source
Estimating Zenith Tropospheric Delays from BeiDou Navigation Satellite System Observations [PDF]
Sensors, 2013 The GNSS derived Zenith Tropospheric Delay (ZTD) plays today a very critical role in meteorological study and weather forecasts, as ZTDs of thousands of GNSS stations are operationally assimilated into numerical weather prediction models. Recently, the Chinese BeiDou Navigation Satellite System (BDS) was officially announced to provide operational ...
Xu, A. +5 more
openaire +6 more sources