Results 41 to 50 of about 2,145,064 (260)
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 +3 more
doaj +1 more source
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 Estimation for Pseudolite Positioning [PDF]
Journal of Global Positioning Systems, 2005 Pseudolites, ground-based GPS signal transmitters, can significantly enhance the GPS satellite geometry or can even be an independent positioning system. However, as pseudolites are very close to the receivers, error effects are different from the traditional GPS and should be considered and modeled in a different way.
Jianguo Jack Wang +4 more
openaire +1 more source
GPS Solutions, 2023 Numerical weather models (NWMs) are important data sources for space geodetic techniques. Additionally, the Global Navigation Satellite System (GNSS) provides many observations to continuously improve and enhance the NWM.
Junsheng Ding +3 more
semanticscholar +1 more source
Remote Sensing, 2021 In network real-time kinematic (NRTK) positioning, atmospheric delay information is critical for generating virtual observations at a virtual reference station (VRS).
Yakun Pu, Min Song, Yunbin Yuan
doaj +1 more source
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 ...
I. U. Nzelibe, H. Tata, T. O. Idowu
semanticscholar +1 more source
Impact of Tropospheric Delay Gradients on Total Tropospheric Delay and Precise Point Positioning
International Journal of Geosciences, 2016 GPS signals are electromagnetic waves that are affected by the Earth’s atmosphere. The Earth’s atmosphere can be categorized, according to its effect on GPS signals, into the ionosphere (ionospheric delay) and neutral atmosphere (tropospheric delay).
Mohamed Elsobeiey, Mohamed El-Diasty
openaire +2 more sources
Establishment of a Real-Time Local Tropospheric Fusion Model
Remote Sensing, 2019 The tropospheric delay is one major error source affecting the precise positioning provided by the global navigation satellite system (GNSS). This error occurs because the GNSS signals are refracted while travelling through the troposphere layer ...
Yibin Yao +4 more
doaj +1 more source
Improving InSAR geodesy using global atmospheric models [PDF]
, 2014 Spatial and temporal variations of pressure, temperature and water vapor content in the atmosphere introduce significant confounding delays in Interferometric Synthetic Aperture Radar (InSAR) observations of ground deformation and bias estimatesof ...
Agram, Piyush Shanker +6 more
core +4 more sources
USING GENERATIVE ADVERSARIAL NETWORKS FOR EXTRACTION OF INSAR SIGNALS FROM LARGE-SCALE SENTINEL-1 INTERFEROGRAMS BY IMPROVING TROPOSPHERIC NOISE CORRECTION [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021 Spatiotemporal variations of pressure, temperature, water vapour content in the atmosphere lead to significant delays in interferometric synthetic aperture radar (InSAR) measurements of deformations in the ground.
B. Ghosh +4 more
doaj +1 more source