Results 51 to 60 of about 1,220 (193)

Modelling Systematic Residuals in Absolute ZTD Estimation from GPS [PDF]

2006 IEEE International Symposium on Geoscience and Remote Sensing, 2006
Abstract —Tropsheric delay is one of important error sources in GPS positioning and InSAR applications. Accurate measurements of ZTD (Zenith Tropospheric Delay) can be used for correcting the atmospheric delay on GPS and InSAR as well as atmospheric science research and applications (e.g. numeric weather prediction).
S. Jin, J.-U. Park, P.-H. Park, J.-H. Cho   +3 more
openaire   +1 more source

Fusion-Based Regional ZTD Modeling Using ERA5 and GNSS via Residual Correction Kriging

Remote Sensing
Zenith Tropospheric Delay (ZTD) and its associated atmospheric water vapor information constitute essential environmental variables for Earth observation (EO)-based atmospheric monitoring and environmental variable retrieval.
Yang Cai, Hongyang Ma, Zhiliang Wang, Shuaishuai Jia, Xin Duan, Ge Shi, Chuang Chen   +6 more
doaj   +1 more source

Calculation GNSS STD, SWD, and ZTD

, 2023
Python package for creating GNSS STD/SWD as well as modelled (GPT/VMF) ZTD Install all required packages indicated in the requirements.
openaire   +1 more source

Accuracy Evaluation and Analysis of GNSS Tropospheric Delay Inversion from Meteorological Reanalysis Data

Remote Sensing, 2022
Accurate estimation of tropospheric delay is significant for global navigation satellite system’s (GNSS) high-precision navigation and positioning. However, due to the random and contingent changes in weather conditions and water vapor factors, the ...
Guolin Liu, Guanwen Huang, Ying Xu, Liangyu Ta, Ce Jing, Yu Cao, Ziwei Wang   +6 more
doaj   +1 more source

Estimation and Evaluation of Zenith Tropospheric Delay from Single and Multiple GNSS Observations

Remote Sensing, 2023
Multi-Global Navigation Satellite Systems (multi-GNSS) (including GPS, BDS, Galileo, and GLONASS) provide a significant opportunity for high-quality zenith tropospheric delay estimation and its applications in meteorology.
Sai Xia, Shuanggen Jin, Xuzhan Jin
doaj   +1 more source

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

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.
Liu Yang, Jingxiang Gao, Dantong Zhu, Nanshan Zheng, Zengke Li   +4 more
doaj   +1 more source

Regression models for predicting daily IGS zenith tropospheric delays in West Africa: Implication for GNSS meteorology and positioning applications

Meteorological Applications, 2021
The ability to precisely and accurately model and predict tropospheric delay is essential for precise global navigation satellite system (GNSS) and meteorological applications.
Samuel Osah, Akwasi A. Acheampong, Collins Fosu, Isaac Dadzie   +3 more
doaj   +1 more source

Data assimilation of GPS-ZTD into the RAMS model through 3D-Var: preliminary results at the regional scale [PDF]

, 2019
The knowledge of water vapour distribution is a key element in atmospheric modeling and considerable information, also at the local scale, can be derived from the GPS-ZTD (global positioning system-Zenith total delay) data.
Marco Fortunato, Stefano Federico, Augusto Mazzoni, Elenio Avolio, Stefano Dietrich, Alessandra Mascitelli, Claudio Transerici, Rosa Claudia Torcasio, Eugenio Realini, Mattia Crespi   +9 more
core   +1 more source

TOMO4D Operator for Assimilation of GNSS Tomography‐Derived Water Vapor Fields Into the WRFDA 4DVAR System to Improve Regional Rainfall Forecasting

Journal of Advances in Modeling Earth Systems, Volume 18, Issue 4, April 2026.
Abstract Accurate representation of atmospheric water vapor is crucial for improving numerical weather prediction, particularly over regions with complex topography and sparse observation networks. Although assimilation of Global Navigation Satellite System (GNSS)‐derived integrated products such as zenith total delay or precipitable water vapor can ...
Arash Tayfehrostami, Yazdan Amerian, Saeed Izanlou, Majid Azadi   +3 more
wiley   +1 more source

Thermally Stable, Low‐Resistance Cu Alloy Contacts for Mg3(Sb, Bi)2 Thermoelectric Materials by Two‐Step Contacting

Small Structures, Volume 7, Issue 3, March 2026.
Selection of suitable electrical contact is crucial for achieving low specific contact resistivity (ρc) at the electrode/thermoelectric (TE) material interface. Sustaining low ρc is far more critical than merely attaining a low value. Moreover, the conversion efficiency (η) and durability are often limited by unstable contact interfaces at various ...
Muhammad Fasih Aamir, Jayachandran Babu, Raju Chetty, Takao Mori   +3 more
wiley   +1 more source