Results 31 to 40 of about 806 (126)

A Study of Standalone GNSS Positioning Precision in Covered Agricultural Environments: ETFE Polytunnels Versus Glass Greenhouses

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
The paper presents an experimental study of the standalone positioning performance of a high‐end survey grade and a mass‐market dual‐frequency GNSS receiver in covered agricultural environments (CAEs) comparing an ETFE polytunnel and a Cambridge‐style glass greenhouse against an open‐field baseline.
Alex Schofield, Jasmine Zidan, Raphael Grech, Esther Anyaegbu, Emilio Loo‐Monardez, Paul A. Jennings, Matthew D. Higgins   +6 more
wiley   +1 more source

The mechanisms in glucose metabolism of aging hippocampus

Ibrain, Volume 11, Issue 4, Page 457-475, Winter 2025.
Cognitive decline in elders stems from the irreversible loss and functional decline of neurons, with the hippocampus being particularly susceptible to age‐related neuronal deterioration. Glucose acts as the primary fuel for the brain, and a constant provision of glucose to the hippocampus is essential for memory and cognitive functions.
Rui He, Fuxing Zhao, Zhiyu Yang, Tingting Wang, Yaohui Zhang, Jinglan Quan, Gaohong Zhu   +6 more
wiley   +1 more source

Volcano‐Tectonic Crisis of Mayotte (2018–2022): A Deformation Model for Geodetic Applications

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 10, October 2025.
Abstract Volcano‐tectonic unrest during the 2018–2022 crisis of Mayotte (Comoros archipelago) generated an island‐wide surface displacement reaching ∼ ${\sim} $20 cm, with a relative (internal) deformation of the island of ∼ ${\sim} $10 cm. Correcting for these displacements, which exceed the required accuracy of geodetic network reference coordinates,
Raphaël Grandin, Xavier Collilieux, Inès Pasquier, Olivier Jamet   +3 more
wiley   +1 more source

A novel stop-and-go kinematic positioning method for PPP–RTK

Geo-spatial Information Science
The technology of precise point positioning – real time kinematic (PPP – RTK) can realize regional accurate positioning. However, poor quality atmospheric corrections can greatly impact the integer ambiguity resolution. The low reliability of interpolated corrections may arise from blocked transmission of the updated corrections, atmospheric ...
Siyao Wang, Rui Tu, Ju Hong, Xiaochun Lu
openaire   +2 more sources

Influence of erosive drivers on the morphology of gullies in the Pampa biome, Southern Brazil

Earth Surface Processes and Landforms, Volume 50, Issue 12, 30 September 2025.
The gullies in the pampa biome of Southern Brazil have different forms and intensity of erosion, despite being spatially close and sometimes this difference is observed within the same gully. The type of soil and rock material proved to be the determining factor in differentiating the shape of the gullies studied, with significant differences in the ...
Lucas Krein Rademann, Romario Trentin, Luis Eduardo de Souza Robaina   +2 more
wiley   +1 more source

Optimizing PPP Performance by Incorporating ZWD Constraints Derived From Data Assimilation

Earth and Space Science, Volume 12, Issue 8, August 2025.
Abstract 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. Accurately representing this parameter is crucial for improving the initialization and accuracy of satellite‐based positioning techniques ...
Masoud Dehvari, Saeed Farzaneh, Ehsan Forootan   +2 more
wiley   +1 more source

Real‐Time Regional Ionosphere Modeling With RFR‐Net Over China

Space Weather, Volume 23, Issue 8, August 2025.
Abstract The mid‐to‐low‐latitude ionosphere, influenced by phenomena such as the Equatorial Ionization Anomaly, responds more sensitively to changes in solar activity, which negatively affect the transmission of various electromagnetic signals. Moreover, next‐generation technologies, particularly Precise Point Positioning‐Real‐Time Kinematic (PPP‐RTK),
Mengfei Sun, Tong Liu, Zonghua Ding, Jian Liu, Yanshi Huang, Kun Zhang, Shengliang Fang, Shizhong Li, Qinglei Kong, Bo Chen   +9 more
wiley   +1 more source

Co‐Ordinated Observations of Multi‐Scale Irregularities Using ICEBEAR and GNSS During the May 2024 Superstorm

Space Weather, Volume 23, Issue 8, August 2025.
Abstract We present observations of plasma structuring from three meters up to hundreds of kilometers at auroral latitudes during the extreme geomagnetic storm of May 2024 using co‐ordinated observations from ICEBEAR and Global Navigation Satellite Systems (GNSS) receivers. Intense irregularities on all spatial scales co‐existed for about 4 hr between ∼
Mahith Madhanakumar, Andres Spicher, Devin Ray Huyghebaert, Anton Kashcheyev, Luca Spogli, Kjellmar Oksavik, Magnus F. Ivarsen, Juha Vierinen, Glenn C. Hussey   +8 more
wiley   +1 more source

Low-Cost GNSS and PPP-RTK: Investigating the Capabilities of the u-blox ZED-F9P Module. [PDF]

Sensors (Basel), 2023
Robustelli U, Cutugno M, Pugliano G.
europepmc   +1 more source

Fault-Free Protection Level Equation for CLAS PPP-RTK and Experimental Evaluations. [PDF]

Sensors (Basel), 2022
Kim E, Song J, Shin Y, Kim S, Son PW, Park S, Park S.   +6 more
europepmc   +1 more source