Results 61 to 70 of about 1,482 (190)

RTK-Quality Positioning With Global Precise Point Positioning Corrections

Navigation, 2023
Global navigation satellite system (GNSS) precise point positioning (PPP) has potential as an alternative or replacement for real-time kinematic (RTK) processing.
Nacer Naciri, Sunil Bisnath
doaj   +1 more source

Study on cycle-slip detection and repair methods for a single dual-frequency global positioning system (GPS) receiver [PDF]

, 2014
In this work, we assessed the performance of the cycle-slip detection methods: Turbo Edit (TE), Melbourne-Wübbena wide-lane ambiguity (MWWL) and forward and backward moving window averaging (FBMWA).
ALTMAYER C, AWANGE J, BAKER D. N, BANVILLE S., BASTOS L., BISNATH S. B., BLEWITT G., CAI C., COLOMBO O., DAI Z., DAI Z., DE LACY M. C., DU S., FOSTER J. C., GENG J., JIN S., KHANDU, KIM D., KINTNER P. M., LEE H.-K., LEICK A, LI Y., LIU Z., WU Y., XU G., ZHANG Q.   +25 more
core   +5 more sources

A new official PPP-RTK positioning service for Germany

, 2023
The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)
Vennebusch, M., Riedel, F., Freitag, M., Goetze, T., Goldan, H., Meißies, M., Reiling, R., Schneider, V., Siebert, J., Winter, V., Gerschwitz, A., Jahn, C., Riecken, J., Rülke, A.   +13 more
openaire   +2 more sources

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

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

Single-station PPP-RTK: correction latency and ambiguity resolution performance [PDF]

Journal of Geodesy, 2021
AbstractSingle-station PPP-RTK is a special case of PPP-RTK in that corrections are computed, instead of a network, by only one single GNSS receiver. The present contribution aims to develop a framework to generate multi-epoch, single-station corrections, thereby providing PPP-RTK users the capability to time-predict corrections that are subject to ...
openaire   +2 more sources

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

Accuracy Evaluation of Ionospheric Delay from Multi-Scale Reference Networks and Its Augmentation to PPP during Low Solar Activity

ISPRS International Journal of Geo-Information, 2021
The Precise Point Positioning (PPP) with fast integer ambiguity resolution (PPP-RTK) is feasible only if the solution is augmented with precise ionospheric parameters.
Lewen Zhao, Jan Douša, Pavel Václavovic   +2 more
doaj   +1 more source