Results 71 to 80 of about 6,471 (208)

Studying Ionosphere Responses to a Geomagnetic Storm in June 2015 with Multi-Constellation Observations

Remote Sensing, 2018
The Global Navigation Satellite System (GNSS) observations with global coverage and high temporal and spatial resolution, provide abundant and high-quality Earth-ionosphere observations.
Yang Liu, Lianjie Fu, Jinling Wang, Chunxi Zhang   +3 more
doaj   +1 more source

Multi-GNSS precise point positioning for precision agriculture [PDF]

Precision Agriculture, 2018
The main objective of this research was to examine the feasibility of Multi-GNSS precise point positioning (PPP) in precision agriculture (PA) through a series of experiments with different working modes (i.e. stationary and moving) under different observation conditions (e.g. open sky, with buildings or with canopy).
Jing Guo, Jing Guo, Maorong Ge, Xingxing Li, David Fairbairn, Leyin Hu, Chunjiang Zhao, Zhenhong Li, Guijun Yang, David F. Watson   +9 more
openaire   +5 more sources

Monitoring of a multi‐span prestressed concrete bridge using satellite interferometric data and comparison with on‐site sensor results

Structural Concrete, EarlyView.
Abstract Satellite‐based Synthetic Aperture Radar Interferometry (InSAR) represents a promising supplement to traditional Structural Health Monitoring (SHM) methods, offering a non‐invasive solution that eliminates the need for sensor installations and provides extensive spatial coverage.
Pier Francesco Giordano, Maciej Kwapisz, Andrea Miano, Riccardo Liuzzo, Alois Vorwagner, Maria Pina Limongelli, Andrea Prota, Marian Ralbovsky   +7 more
wiley   +1 more source

GNSS Reflectometry-Based Ocean Altimetry: State of the Art and Future Trends

Remote Sensing
For the past 20 years, Global Navigation Satellite System reflectometry (GNSS-R) technology has successfully shown its potential for remote sensing of the Earth’s surface, including ocean and land surfaces.
Tianhe Xu, Nazi Wang, Yunqiao He, Yunwei Li, Xinyue Meng, Fan Gao, Ernesto Lopez-Baeza   +6 more
doaj   +1 more source

De Geer moraine internal architecture based on sedimentological and geophysical investigations and implications for ice‐marginal reconstructions

Boreas, EarlyView.
De Geer moraines may act as valuable ice‐marginal indicators; however, to date, their variable mode of formation has presented challenges for this utility. Here, we present sedimentological and ground penetrating radar data of DGMs located in southwest Finland.
Gwyneth E. Rivers, Robert D. Storrar, Antti E. K. Ojala, Joni Mäkinen, Camilla Holmroos, Naomi Holmes   +5 more
wiley   +1 more source

PPP and PPP-AR Kinematic Post-Processed Performance of GPS-Only, Galileo-Only and Multi-GNSS

Remote Sensing, 2019
Precise point positioning (PPP) has been used for decades not only for general positioning needs but also for geodetic and other scientific applications.
Georgia Katsigianni, Sylvain Loyer, Felix Perosanz   +2 more
doaj   +1 more source

Automated corrosion surface quantification in steel transmission towers using UAV photogrammetry and deep convolutional neural networks

Computer-Aided Civil and Infrastructure Engineering, EarlyView.
Abstract Corrosion in steel transmission towers poses a challenge to structural integrity and safety, requiring efficient detection methods. Traditional visual inspections are unsustainable due to the complexity and volume of structures. Their manual, qualitative, and subjective nature often leads to inconsistencies in maintenance planning.
Pierclaudio Savino, Fabio Graglia, Gabriele Scozza, Vincenzo Di Pietra   +3 more
wiley   +1 more source

Multi-GNSS Hybridization for precise positioning

, 2019
GNSS are widely used for precise positioning applications of geosciences and especially space geodesy. So far, mainly the existing GPS was extensively used for scientific applications. With the arrival of the new European Galileo system it became imperative to include the new system in the studies and check the new capabilities that it will bring as a ...
openaire   +4 more sources

A displacement measurement methodology for deformation monitoring of long‐span arch bridges during construction based on scalable multi‐camera system

Computer-Aided Civil and Infrastructure Engineering, EarlyView.
Abstract This study presents a scalable multi‐camera system (S‐MCS) for high‐precision displacement measurement and deformation monitoring of long‐span arch bridges during construction. Traditional methods such as robotic total stations (RTS) and single‐camera systems face limitations in dynamic scalability, synchronous multi‐point monitoring, and ...
Yihe Yin, Xiaolin Liu, Biao Hu, Wenjun Chen, Xiao Guo, Danyang Ma, Xiaohua Ding, Linhai Han, Qifeng Yu   +8 more
wiley   +1 more source

Adaptive GNSS Receiver Design for Highly Dynamic Multipath Environments

IEEE Access, 2020
Ubiquitous navigation requires timely, uninterrupted and accurate estimate of receiver's position at all times, in all environments and for all modes of transportation and it is highly dependent on satellite availability, geometry and accurate ...
Arif Hussain, Arslan Ahmed, Hina Magsi, Rajesh Tiwari   +3 more
doaj   +1 more source