Results 81 to 90 of about 3,196 (215)

Three‐Year Characterization of Boundary Layer Dynamics From GNSS Zenith Wet Delay Spectral Analysis

Atmospheric Science Letters, Volume 27, Issue 6, June 2026.
Three years of GNSS zenith wet delay observations at Payerne reveal that spectral parameters—cutoff frequency α and variance σ2—capture robust seasonal cycles in boundary layer turbulence (R2 = 0.54 for α). Their inverse coupling tightens to r = −0.82 under summer convection, encoding regime‐dependent physics.
Gaël Kermarrec, Xavier Calbet, Zhiguo Deng   +2 more
wiley   +1 more source

Comparative Metaheuristic Optimization of PI Controllers for Electric Vehicle Speed Control

Engineering Reports, Volume 8, Issue 6, June 2026.
This paper presents the design, modeling, and simulation validation of an electric vehicle system, using speed variation as a reference to ensure optimal operation in terms of acceleration and deceleration. First, a conventional PI controller controls the vehicle's speed.
Samira Heroual, Belkacem Belabbas, Mohamed Metwally Mahmoud, Yasser Diab, Tayeb Allaoui, Vojtech Blazek, Daniel Eutyche Mbadjoun Wapet, Ali M. El‐Rifaie, Galal F. Abdelaal   +8 more
wiley   +1 more source

Transformation of Neill Mapping Function for GPS Tropospheric Delay

, 2012
The refraction of the Global Positioning System (GPS) signal as it passes through the neutral atmosphere from the satellite to the earth can be referred as GPS tropospheric delay, which causes longer distance traveled by the signal.
Sakidin, H.; Universiti Teknikal Malaysia Melaka, Chuan, T.C.; Universiti Teknikal Malaysia Melaka   +1 more
core  

An initial investigation of the non-isotropic feature of GNSS tropospheric delay

Satellite Navigation
Tropospheric delay is a significant error source in Global Navigation Satellite Systems (GNSS) positioning. Slant Path Delay (SPD) is commonly derived by multiplying Zenith Tropospheric Delay (ZTD) with a mapping function.
Ying Xu, Zaozao Yang, Hongzhan Zhou, Fangzhao Zhang   +3 more
doaj   +1 more source

Decoding XCO2 Distributions Over the Indian Subcontinent Using Deep Neural Network Based High‐Resolution Long‐Term Satellite Observations

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.
Abstract India often faces challenges in monitoring atmospheric carbon dioxide (CO2) through satellite observations due to persistent cloud cover, especially during the monsoon season. This limitation affects the continuous tracking of carbon and hinders accurate assessments of carbon‐climate interactions.
Digvijay Kumar Singh, Ravi Kumar Kunchala, Sarvesh Dubey, Chiranjit Das, Balaji Baduru   +4 more
wiley   +1 more source

DataSheet1_Adaptive Fusion of Multi-Source Tropospheric Delay Estimates for InSAR Deformation Measurements.docx

, 2022
Atmospheric propagation delay correction is the key to improving the accuracy of deformation measurement of satellite interferometric synthetic aperture radar (InSAR).
Yian Wang (160311), Wei Tang (53470), Mingsheng Liao (8858897), Lu Zhang (50563), Li Zhang (8200), Jie Dong (12143)   +5 more
core   +1 more source

Correcting InSAR Topographically Correlated Tropospheric Delays Using a Power Law Model Based on ERA-Interim Reanalysis

Remote Sensing, 2017
Tropospheric delay caused by spatiotemporal variations in pressure, temperature, and humidity in the lower troposphere remains one of the major challenges in Interferometric Synthetic Aperture Radar (InSAR) deformation monitoring applications.
Bangyan Zhu, Jiancheng Li, Wei Tang
doaj   +1 more source

Terrestrial Analogs to Titan for Geophysical Research

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract Saturn's moon Titan exhibits remarkable parallels to the Earth in many geophysical and geological processes not found elsewhere in the solar system at the present day. These include a nitrogen atmosphere with a condensible gas—methane—replacing the Earth's water, leading to an active meteorology with rainfall and surface manifestations ...
Conor A. Nixon, Samuel Birch, Audrey Chatain, Charles Cockell, Kendra K. Farnsworth, Peter M. Higgins, Stéphane Le Mouélic, Rosaly M. C. Lopes, Michael J. Malaska, Mohit Melwani Daswani, Kelly E. Miller, Catherine D. Neish, Olaf G. Podlaha, Jani Radebaugh, Lauren R. Schurmeier, Ashley Schoenfeld, Krista M. Soderlund, Anezina Solomonidou, Christophe Sotin, Nicholas A. Teanby, Tetsuya Tokano, Steven D. Vance   +21 more
wiley   +1 more source

Tropospheric delay effects on relative GPS height determination [PDF]

, 2005
In the global positioning system (GPS) surveying for point positioning, one of the principal limiting error source is incorrect modeling of the delay experienced by GPS signal propagating through the electrically neutral atmosphere, usually referred to ...
Mohd. Zaki, Mohd. Zahlan, Kamarudin, Md. Nor   +1 more
core  

GPS network-based approach to mitigate residual tropospheric delay in low latitude areas [PDF]

, 2005
A strong spatio-temporal variation of the wet component in the troposphere leaves us in a peculiar predicament. The residual tropospheric delay will remain in the measurements and therefore affect the estimation of related parameters. In the areas of hot
Rizos, Chris, Musa, Tajul A., Lim, Samsung   +2 more
core   +3 more sources