Results 101 to 110 of about 1,220 (193)

An optimized BP neural network for modeling zenith tropospheric delay in the Chinese mainland using coupled particle swarm and genetic algorithm

Geo-spatial Information Science
Tropospheric delay influences high-precision navigation positioning and precipitable water vapor retrieval with the Global Navigation Satellite System (GNSS).
Liangke Huang, Haohang Bi, Hongxing Zhang, Shitai Wang, Fasheng Liao, Lilong Liu, Weiping Jiang   +6 more
doaj   +1 more source

Methods and Evaluation of AI-Based Meteorological Models for Zenith Tropospheric Delay Prediction

Remote Sensing
Zenith Tropospheric Delay (ZTD) is a significant error source affecting the accuracy of certain space geodetic measurements. This study evaluates the performance of Artificial Intelligence (AI) based meteorological models, such as Fengwu and Pangu, in ...
Si Xiong, Jiamu Mei, Xinchuang Xu, Ziyu Shen, Liangke Huang   +4 more
doaj   +1 more source

Analysis of Spatial Decorrelation of Small-Scale Tropospheric Delay Using High-Resolution NWP Data. [PDF]

Sensors (Basel), 2023
Håkegård JE, Sokolova N, Morrison A.
europepmc   +1 more source

Evaluation of the Zenith Tropospheric Delay (ZTD) Derived from VMF3_FC and VMF3_OP Products Based on the CMONOC Data

Prior tropospheric information, especially zenith tropospheric delay (ZTD), is particularly important in GNSS data processing. The two types of ZTD models, those that require and do not require meteorological parameters, are the most commonly used models,
Jingge Ma, Liang Chen, Fei Yang, Wenyu Sun, Junya Zhang, Haoran Zhang, Shiqi Xu   +6 more
core   +1 more source

Multi-GNSS-Weighted Interpolated Tropospheric Delay to Improve Long-Baseline RTK Positioning. [PDF]

Sensors (Basel), 2022
Mirmohammadian F, Asgari J, Verhagen S, Amiri-Simkooei A.   +3 more
europepmc   +1 more source

Precise Point Positioning (PPP): GPS vs. GLONASS and GPS+GLONASS with an alternative strategy for tropospheric Zenith Total Delay (ZTD) estimation [PDF]

, 2017
Different Global Navigation Satellite System (GNSS) constellations are available these days. This has led to an increase in the number of satellites available for the user, and that presents different performance levels for the user requirements like ...
Mohammed, Jareer Jaber
core  

Evaluation of InSAR Tropospheric Delay Correction Methods in the Plateau Monsoon Climate Region Considering Spatial-Temporal Variability. [PDF]

Sensors (Basel), 2023
Yang Q, Zuo X, Guo S, Zhao Y.
europepmc   +1 more source

Atmospheric water vapor from GNSS and InSAR. GNSS ZTD validation and InSAR APS calibration procedures and preliminary results

, 2018
LAUREA MAGISTRALEI sistemi globali di navigazione satellitare (GNSS), che includono il sistema di posizionamento globale GPS, anche se sviluppati principalmente per il posizionamento, sono ora ampiamente utilizzati per scopi civili, tra cui ...
BONFIGLIO, ALICE
core  

Assessment of the PPP-AR Strategy for ZTD and IWV in Africa: A One-Year GNSS Study

International audienceWith the increasing demand for near real-time atmospheric water vapor monitoring, this study evaluates the performance of the open-source PRIDE PPP-AR software (version 3.0.5) for retrieving Zenith Total Delay (ZTD) and Integrated ...
Ndiaye, Mapathé, Faye, Ngor, Pierre Bosser, Bosser, Pierre, Tine, Moustapha Gning, Ngor Faye, Lila Jean-Louis, Jean-Louis, Lila, Moustapha Gning Tine, Mapathé Ndiaye   +9 more
core   +1 more source

Assimilating UAV-based GNSS ZTDs for Numerical Weather Predictions

In recent decades, various studies have demonstrated that assimilating tropospheric parameters from ground-based GNSS receivers benefits numerical weather predictions (NWPs). However, the achieved performance is limited by the spatial resolution of GNSS, especially in the vertical direction.
Zhenyi Zhang, Mengjie Liu, Valeria Huber, Gregor Möller, Jan Henneberger, Philipp Kryenbühl, Lukas Hammerschmidt, Grzegorz Kłopotek, Benedikt Soja   +8 more
openaire   +2 more sources