Results 81 to 90 of about 6,471 (208)

code s multi gnss orbit and clock solution [PDF]

, 2015
We present CODE’s latest MGEX solution a fully integrated 5-system (GPS, GLONASS, Galileo, BeiDou, QZSS) GNSS orbit and clock solution, based on data starting from January 2014. The impact of radiation pressure modeling and orbital arc length on the solution quality will be discussed.
Prange, Lars, Orliac, Etienne, Dach, Rolf, Arnold, Daniel, Beutler, Gerhard, Schaer, Stefan, Jäggi, Adrian   +6 more
openaire   +2 more sources

Monitoring the structure of restored forests and assessing aboveground carbon density through canopy metrics derived from digital aerial photogrammetry and LiDAR

Restoration Ecology, EarlyView.
Monitoring forest dynamics is crucial to understanding forest succession drivers and ensuring successful restoration outcomes. Laser scanners onboard robust drone systems are valuable for penetrating forest canopies and providing structural details. With the growing accessibility to low‐cost drones equipped with advanced optical sensors, photogrammetry
Giulio B. Santoro, Paulo G. Molin, José M. S. M. Viveiros, Giovanna de Andrade Ferreira, Vinicius M. Costa, Leo E. Haneda, Melodie K. S. D. Sinegalia, Laury Cullen Jr, Pedro H. S. Brancalion, Carlos A. Silva, Danilo R. A. de Almeida   +10 more
wiley   +1 more source

Hierarchical Planning Applied to the Preliminary Design of CubeSats: Nanospace Study

Systems Engineering, Volume 28, Issue 3, Page 438-452, May 2025.
ABSTRACT CubeSat design has been already studied and formalized but knowledge representation remains a challenge. The management of human‐learnt knowledge during the process is not an aspect that is often spoken about. This paper discusses the proposal of integrating a hierarchical planning approach with a model‐based one to the open‐source Nanospace ...
Thibault Gateau, Sophia Salas Cordero, Rob Vingerhoeds   +2 more
wiley   +1 more source

One‐Hundred Fundamental, Open Questions to Integrate Methodological Approaches in Lake Ice Research

Water Resources Research, Volume 61, Issue 5, May 2025.
Abstract The rate of technological innovation within aquatic sciences outpaces the collective ability of individual scientists within the field to make appropriate use of those technologies. The process of in situ lake sampling remains the primary choice to comprehensively understand an aquatic ecosystem at local scales; however, the impact of climate ...
Joshua Culpepper, Sapna Sharma, Grant Gunn, Madeline R. Magee, Michael F. Meyer, Eric J. Anderson, Chris Arp, Sarah W. Cooley, Wayana Dolan, Hilary A. Dugan, Claude R. Duguay, Benjamin M. Jones, Georgiy Kirillin, Robert Ladwig, Matti Leppäranta, Di Long, John J. Magnuson, Tamlin Pavelsky, Sebastiano Piccolroaz, Dale M. Robertson, Bethel G. Steele, Manu Tom, Gesa A. Weyhenmeyer, R. Iestyn Woolway, Marguerite A. Xenopoulos, Xiao Yang   +25 more
wiley   +1 more source

The Role of Salt Tectonics in the 2021 Central Adriatic Seismic Sequence

Earth and Space Science, Volume 12, Issue 5, May 2025.
Abstract On 27 March 2021 a 3‐months lasting seismic sequence struck the Central Adriatic Basin that is part of the Adria plate, a relatively undeformed plate since recent times. Analyzing the waveform data acquired by the Italian and Croatian seismic networks, we computed the location parameters of 160 earthquakes and the focal mechanisms of the Mw 5 ...
F. Di Luccio, M. Palano, L. Scognamiglio, A. Marchetti, I. Dasović, M. Mustać, F. Magnoni, P. Artale Harris, E. Casarotti, A. Polonia, L. Gasperini, A. Dannowski, H. Kopp   +12 more
wiley   +1 more source

A Regional 3‐D Data Assimilation Model for the Ionospheric Electron Density at Middle‐to‐High Latitudes in the Northern Hemisphere

Space Weather, Volume 23, Issue 5, May 2025.
Abstract In this paper, we developed an efficient regional three‐dimensional data assimilation model focused on the middle‐to‐high latitude ionosphere in the Northern Hemisphere. The model employed the Empirical Canadian High Arctic Ionospheric Model (E‐CHAIM) as the background, which was specifically optimized for high‐latitude applications and has ...
Ling‐Xin Zhao, Qing‐He Zhang, Xin‐An Yue, Jian‐Hui He, Yong Wang, Zan‐Yang Xing, Xu Zhou, Yu‐Zhang Ma, P. T. Jayachandran, Kjellmar Oksavik, Larry Lyons, Tong Xu, Shu‐Ji Sun   +12 more
wiley   +1 more source

Global Sporadic‐E Prediction and Climatology Using Deep Learning

Space Weather, Volume 23, Issue 5, May 2025.
Abstract Sporadic‐E Es $\left({E}_{s}\right)$ is an ionospheric phenomenon defined by strong layers of plasma which may interfere with radio wave propagation. In this work, we develop deep learning models to improve the understanding of Es ${E}_{s}$, including the presence, intensity and height of the layers. We developed three separate models.
J. A. Ellis, D. J. Emmons, M. B. Cohen
wiley   +1 more source

Multi-GNSS-Weighted Interpolated Tropospheric Delay to Improve Long-Baseline RTK Positioning. [PDF]

Sensors (Basel), 2022
Mirmohammadian F, Asgari J, Verhagen S, Amiri-Simkooei A.   +3 more
europepmc   +1 more source

Efficient 3D robotic mapping and navigation method in complex construction environments

Computer-Aided Civil and Infrastructure Engineering, Volume 40, Issue 12, Page 1580-1605, 9 May 2025.
Abstract Recent advancements in construction robotics have significantly transformed the construction industry by delivering safer and more efficient solutions for handling complex and hazardous tasks. Despite these innovations, ensuring safe robotic navigation in intricate indoor construction environments, such as attics, remains a significant ...
Tianyu Ren, Houtan Jebelli
wiley   +1 more source

Slow Rupture, Long Rise Times, and Multi‐Fault Geometry: The 2020 M6.4 Southwestern Puerto Rico Mainshock

Geophysical Research Letters, Volume 52, Issue 8, 28 April 2025.
Abstract The M6.4 mainshock of the southwestern Puerto Rico seismic sequence on 7 January 2020, was one of the most impactful modern earthquakes in the northeastern Caribbean. Due to its offshore location and complex aftershock distribution, its source kinematics remain poorly constrained.
M. M. Solares‐Colón, D. E. Goldberg, D. Melgar, E. A. Vanacore, V. J. Sahakian, W. L. Yeck, F. Hernández, A. M. López‐Venegas   +7 more
wiley   +1 more source