Results 101 to 110 of about 1,516 (192)

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

An Interferometric Synthetic Aperture Radar Tropospheric Delay Correction Method Based on a Global Navigation Satellite System and a Backpropagation Neural Network: More Suitable for Areas with Obvious Terrain Changes. [PDF]

Sensors (Basel), 2023
Qiu L, Chen P, Yao Y, Chen H, Tang F, Xiong M.   +5 more
europepmc   +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

Feasibility Assessment of Heavy Rainfall Forecast Using GPS-Derived ZTDs

This study focuses on the correlation between Zenith Total Delays (ZTDs) derived from global positioning system (GPS), and rainfalls. The feasibility assessment of heavy rain forecast by GPS-derived ZTDs during typhoon events are subsequently analyzed ...
曾莉鈞, Li-Chun Tseng
core   +1 more source

Brazilian neutrospheric delay (ZTD) temporal series and development of a climatology over nine-years data from soundering and GNSS

The Zenith Total Delay (ZTD) is one of the main sources of error associated with the neutrosphere in Global Navigation Satellite System (GNSS). This error can be estimated through GNSS processing and determined via in situ measurements, such as those ...
Alves, Daniele Barroca Marra [UNESP], Gouveia, Tayná Aparecida Ferreira [UNESP], Jerez, Gabriel Oliveira [UNESP], Albuquerque, Afonso Marques [UNESP]   +3 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

ZTD yükseklik düzeltme modellerinin araştırılması: Orta Avrupa örneği

Journal of Geodesy and Geoinformation
High accuracy tropospheric products play a key role in precise positioning. The parameters, such as Zenith Tropospheric Delay (ZTD), pressure and temperature, are obtained by troposphere models. However, height corrections should be considered for the parameters since troposphere models are produced for specific grid or model heights.
openaire   +1 more source

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

Tracking Animal Health in Zoos Using Blockchain Technology. [PDF]

Blockchain Healthc Today
Mousley A, Ali F, Lyons M, Barenji RV.
europepmc   +1 more source