Results 71 to 80 of about 506 (156)
Reduction of ZTD outliers through improved GNSS data processing and screening strategies [PDF]
Atmospheric Measurement Techniques, 2017 Abstract. Though Global Navigation Satellite System (GNSS) data processing has been significantly improved over the years, it is still commonly observed that zenith tropospheric delay (ZTD) estimates contain many outliers which are detrimental to meteorological and climatological applications.
Katarzyna Stepniak +2 more
openaire +3 more sources
Optimizing PPP Performance by Incorporating ZWD Constraints Derived From Data Assimilation
Earth and Space Science, Volume 12, Issue 8, August 2025.Abstract One of the primary error sources limiting the performance of the Precise Point Positioning (PPP) technique is the atmospheric wet delay, caused by the presence of water vapor in the lower atmosphere. Accurately representing this parameter is crucial for improving the initialization and accuracy of satellite‐based positioning techniques ...
Masoud Dehvari +2 more
wiley +1 more source
Meteorological Applications, 2020 In this study, a method of haze prediction has been developed based on zenith tropospheric delay (ZTD). The relationship between ZTD and fine particulate matter (PM2.5, the main component of haze) during hazy periods in Beijing from 2015 to 2018 was ...
Min Guo, Hanwei Zhang, Pengfei Xia
doaj +1 more source
Remote SensingImproving the accuracy of zenith tropospheric delay (ZTD) models is an important task. However, the existing ZTD models still have limitations, such as a lack of appropriate vertical adjustment function and being unsuitable for China, which has a complex
Jihong Zhang +6 more
doaj +1 more source
Acta Crystallographica Section A, Volume 81, Issue 4, Page 279-293, July 2025.Direct derivation of anisotropic atomic displacement parameters is possible using molecular dynamics simulations of supercells at finite temperature.Atomic displacement parameters (ADPs) are crystallographic information describing the statistical distribution of atoms around an atom site.
Yoyo Hinuma
wiley +1 more source
Journal of Geospatial Information Science and Engineering, 2020 The tropospheric delay is an essential source of error for positioning using the Global Navigation Satellite System (GNSS). Scientific applications of GNSS positioning such as the study of earth crust deformation and earthquake prediction require high ...
Syachrul Arief, Andrea Gatti
doaj +1 more source
ZTD$_{JAVA}$: Mitigating Software Supply Chain Vulnerabilities via Zero-Trust Dependencies
, 2023 13 pages, 3 figures, 8 ...
Amusuo, Paschal C. +7 more
openaire +2 more sources
Journal of Geophysical Research: Solid Earth, Volume 130, Issue 6, June 2025.Abstract Non‐tidal loading (NTL) introduces surface deformation on the Earth and increases the variability in coordinates measured by space geodetic techniques. Correcting NTL displacements in Global Navigation Satellite Systems (GNSS) analysis has been discussed extensively, commonly at the parameter level.
Jungang Wang +6 more
wiley +1 more source
Assimilation of GPS ZTD in meteorological models by 3D Var
, 2018 The purpose of the data assimilation is to optimally use all the available information, to determine as accurately as possible the state of the atmosphere. We show the assimilation of the GPS-ZTD (Global Positioning System - Zenith Total Delay) by a 3D-Var data assimilation system that can be used in cycling mode with the Regional Atmospheric Modeling ...
A. Mascitelli +4 more
+7 more sources
AtmosphereZenith tropospheric delay (ZTD) is a significant atmospheric error that impacts the Global Navigation Satellite System (GNSS). Developing a high-precision, long-term forecasting model for ZTD can provide valuable insights into the overall trends of ...
Zhengdao Yuan +6 more
doaj +1 more source