Analysing the Zenith Tropospheric Delay Estimates in On-line Precise Point Positioning (PPP) Services and PPP Software Packages [PDF]
Sensors, 2018 As Global Navigation Satellite System (GNSS) signals travel through the troposphere, a tropospheric delay occurs due to a change in the refractive index of the medium.
Jorge Mendez Astudillo +3 more
doaj +11 more sources
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
Evaluation of the ZWD/ZTD Values Derived from MERRA-2 Global Reanalysis Products Using GNSS Observations and Radiosonde Data [PDF]
Sensors, 2020 Tropospheric delay is one of the main errors affecting high-precision positioning and navigation and is a key parameter of water vapor detection in the Global Navigation Satellite System (GNSS).
Liangke Huang +5 more
doaj +2 more sources
A Regional NWP Tropospheric Delay Inversion Method Based on a General Regression Neural Network Model [PDF]
Sensors, 2020 Tropospheric delay is a major error source that affects the initialization and re-initialization speed of the Global Navigation Satellite System’s (GNSS) medium-/long-range baseline in Network Real-Time Kinematic (NRTK) positioning.
Lei Li +5 more
doaj +2 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 +3 more
doaj +2 more sources
Modeling and Forecasting the GPS Zenith Troposphere Delay in West Antarctica Based on Different Blind Source Separation Methods and Deep Learning [PDF]
Sensors, 2020 Tropospheric delay is an important error source in global positioning systems (GPS), and the water vapor retrieved from the tropospheric delay is widely used in meteorological research such as climate analysis and weather forecasting.
Qingchuan Zhang +3 more
doaj +2 more sources
A New Zenith Tropospheric Delay Grid Product for Real-Time PPP Applications over China [PDF]
Sensors, 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 ...
Yidong Lou +5 more
doaj +2 more sources
A Regional Zenith Tropospheric Delay (ZTD) Model Based on GPT3 and ANN [PDF]
Remote Sensing, 2021 The delays of radio signals transmitted by global navigation satellite system (GNSS) satellites and induced by neutral atmosphere, which are usually represented by zenith tropospheric delay (ZTD), are required as critical information both for GNSS positioning and navigation and GNSS meteorology.
Fei Yang +4 more
openaire +2 more sources
A global grid model for the estimation of zenith tropospheric delay considering the variations at different altitudes [PDF]
Geoscientific Model Development, 2023 The accuracy of tropospheric delay correction heavily depends on the quality of the tropospheric model, and the zenith tropospheric delay (ZTD) is an important factor affecting the tropospheric delay. Therefore, it is essential to establish a precise ZTD
L. Huang +10 more
doaj +1 more source
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