Results 81 to 90 of about 1,086,410 (154)

A Tropospheric Delay Model for InSAR in Alpine Canyon Regions Through Incorporation of Time-Varying Gaussian Coefficients and Coupled ZWD

Atmosphere
This study addresses the stratified and turbulent tropospheric delays that impede interferometric synthetic aperture radar (InSAR) deformation monitoring in alpine canyon regions.
Jihong Zhang, Xiaoqing Zuo, Shipeng Guo, Cheng Huang, Xuefu Yue   +4 more
doaj   +1 more source

A Global Model for Estimating Tropospheric Delay and Weighted Mean Temperature Developed with Atmospheric Reanalysis Data from 1979 to 2017

Remote Sensing, 2019
Precise modeling of tropospheric delay and weighted mean temperature (Tm) is critical for Global Navigation Satellite System (GNSS) positioning and meteorology.
Zhangyu Sun, Bao Zhang, Yibin Yao
doaj   +1 more source

HASH-Z: A Height-Correction Adjusted Spherical Harmonic Model for Real-Time Tropospheric Delay Correction Over China

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Precise point positioning (PPP) has become a key technique in global navigation satellite systems (GNSS) applications, but its use in real-time is limited by long convergence times.
Hao Chen, Ningbo Wang, Kefei Zhang, Tomasz Hadas, Zishen Li, Hongxing Zhang, Suqin Wu, Longjiang Li, Hang Zhong, Liang Wang   +9 more
doaj   +1 more source

Optimizing PPP Performance by Incorporating ZWD Constraints Derived from Data Assimilation [PDF]

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.
Forootan, Ehsan; id_orcid, Farzaneh, Saeed, Dehvari, Masoud   +2 more
core   +1 more source

Deep neural network enhanced global tropospheric zenith delay model

, 2019
With the growing use of airborne platforms in Earth observation, accurate tropospheric delay corrections across various altitudes have become essential. Most existing tropospheric delay models are referenced to the Earth’s surface and rely on analytical ...
Balidakis, Kyriakos, Wang, Jian, Zhang, Mingyuan, Yuan, Peng, Schuh, Harald, Jiang, Weiping, Wickert, Jens, Wang, Jungang, Xia, Pengfei, Deng, Zhiguo   +9 more
core   +1 more source

A New Global ZTD Forecast Model Based on Improved LSTM Neural Network

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Zenith tropospheric delay (ZTD), consisting of zenith hydrostatic delay (ZHD) and zenith wet delay (ZWD), is a significant contributor to errors in precise positioning using the global navigation satellite system (GNSS) precise point positioning (PPP ...
Lin He, Yibin Yao, Chaoqian Xu, Zhang Huan, Feifei Tang, Changquan Ji, Zhuoya Liu, Wentan Wu   +7 more
doaj   +1 more source

AGFS: a two-step real-time tropospheric delay model by integrating GNSS, ERA5, and GFS

Geo-spatial Information Science
Tropospheric delay is a major error source in high-precision positioning with global navigation satellite systems (GNSS). However, accurately modeling tropospheric delay remains challenging, particularly for real-time applications in regions with sparse ...
Zhilu Wu, Yang Yu, Bofeng Li, Miaomiao Wang   +3 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

GPS monitoring of the tropical storm delta along the Canary Islands track, November 28-29, 2005

, 2009
In this article we analyze the variations of the Zenith Tropospheric Delay (ZTD) and its components, Zenith Hydrostatic Delay (ZHD) and Zenith Wet Delay (ZWD) recorded by the GPS reference stations in the area of the Canary Islands during the passing of ...
Yagüe, C., Fernández Torres, José, P. J. González, J. Fernández, Ramírez, F., A. Seco, C. Yagüe, González, Pablo J., García, Rafael, Prieto, E., F. Ramírez, E. Prieto, Seco, Andrés, R. García   +13 more
core   +1 more source