Results 51 to 60 of about 1,004 (162)

Integration of Field Observations With Forward and Inverse Modeling for Tsunami Reconstructions Along the Fjord‐Dominated Coastlines of Northern Cascadia

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 7, July 2026.
Abstract Forward and inverse modeling techniques are often applied to paleotsunamis to reconstruct inundation parameters. The accuracy of both types of models can be influenced by geomorphology, particularly in areas such as northern Cascadia, where rocky headlands and fjords influence tsunami flow and the preservation of sedimentary deposits ...
Stephen E. Bartlett, Jessica E. Pilarczyk, Catherine R. Jeffries, Michaela Spiske, David Huntley, Roger MacLeod, Robert Weiss, Davin J. Wallace, Anthony Giang, Diana M. Allen, Peter T. Bobrowsky, Tseshaht (c̓išaaʔatḥ) First Nation   +11 more
wiley   +1 more source

MSE-impact of PPP-RTK ZTD estimation strategies

Advances in Space Research, 2018
In PPP-RTK network processing, the wet component of the zenith tropospheric delay (ZTD) cannot be precisely modelled and thus remains unknown in the observation equations. For small networks, the tropospheric mapping functions of different stations to a given satellite are almost equal to each other, thereby causing a near rank-deficiency between the ...
Wang, K. (author), Khodabandeh, A. (author), Teunissen, P.J.G. (author)   +2 more
openaire   +5 more sources

Oxidative Stress and DNA Epigenetic Modifications in Cancer: Mechanisms and Targeted Therapeutics

MedComm – Oncology, Volume 5, Issue 2, June 2026.
Reactive oxygen species (ROS) modulate DNA methyltransferases (DNMTs), ten‐eleven translocation family proteins (TETs) and their cofactors, reshaping 5‐methylcytosine (5mC)/5‐hydroxymethylcytosine (5hmC)/5‐formylcytosine (5fC) landscapes and gene expression in cancer cells. In turn, epigenetic control of antioxidant and metabolic pathways feeds back on
Xishan Yang, Qitai Chen, YuJie Yu, Yi Zang, Rujia Zheng, Zhe Zhang, Shuaijun Lu, Li Zhou   +7 more
wiley   +1 more source

Comparative Performance of Real-Time GNSS Positioning Solutions for Marine Applications Under Different Correction Strategies

Applied Sciences
Accurate and reliable positioning is a fundamental requirement for marine applications, particularly in hydrographic surveying, where real-time data acquisition is essential.
Nedim Onur Aykut
doaj   +1 more source

Accurate Ionospheric TEC Prediction With a Causal Attention Network at Northern EIA Crests

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.
Abstract As the Sun approaches the peak of its 25th activity cycle, precise ionospheric forecasting has become increasingly challenging. Low‐latitude regions have emerged as a persistent bottleneck for space weather operations. Extensive evidence reveals that existing AI models exhibit significant performance degradation in these regions, demonstrating
Tong Liu, Wu Chen, Zexin Lu, Wenlong Zhang, Yuhang Lu, Feng Wang, Mengfei Sun, Wenfeng Nie, Junsheng Ding, Yufang He, Bo Chen   +10 more
wiley   +1 more source

A 4D tomographic ionospheric model to support PPP-RTK

Journal of Geodesy, 2019
Successful implementation of integer ambiguity resolution enabled precise point positioning (aka PPP-RTK) algorithms is inextricably linked to the ability of a user to perform near real-time positioning by quickly and reliably resolving the integer carrier-phase ambiguities.
G. Olivares-Pulido, M. Terkildsen, K. Arsov, P. J. G. Teunissen, A. Khodabandeh, V. Janssen   +5 more
openaire   +4 more sources

A New Strategy for Improving Multi‐Frequency PPP‐RTK Ionospheric Correction Availability and User Performance in Low‐ and Middle‐Latitudes

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract High‐precision regional ionospheric correction products are essential for achieving accurate and fast‐convergence solutions in Precise Point Positioning Real‐Time Kinematic (PPP‐RTK). For users in low‐ and middle‐latitudes, PPP‐RTK server narrow‐lane (NL) ambiguity resolution (AR) typically requires more than 10 min, which largely affects the ...
Pan Li, Shitong Chen, Jiahuan Hu, Xin Xie, Jiadi Dai, Bao Shu, Guanwen Huang   +6 more
wiley   +1 more source

Geomorphic Effectiveness of an Extreme Flood in a Mountain River: Evidence From Pre‐ and Post‐Event Surveys in a Subtropical Region of Southern Brazil

Hydrological Processes, Volume 40, Issue 5, May 2026.
The extreme flooding of April 2024 caused a complete “geomorphic reset”, resulting in a 24% widening of the channel and a transition to critical or supercritical flow regimes. The energy of the event broke through the stable armouring layer, reducing the armouring ratio from 7.9 to 4.9 and intensely removing fine sediments from the subsurface.
Gabriel Augusto Feyh, Jean Paolo Gomes Minella, Eno Darci Saatkamp, Lidiane Buligon, Gustavo Henrique Merten, Felipe Bernardi, Cristiano Carvalho da Silva, Angelo Garcia Costa, Alice Prates Bisso Dambroz   +8 more
wiley   +1 more source

RT‐FAIRS: Real‐Time Factor‐Adjusted Ionospheric Residual Statistics Approach for Generating Accuracy Information in Global Ionospheric Maps

Space Weather, Volume 24, Issue 4, April 2026.
Abstract Ionospheric delays remain a major error source in Global Navigation Satellite Systems (GNSS). The International GNSS Service (IGS) provides Global Ionospheric Maps (GIMs) that offer vertical total electron content (VTEC) estimates together with RMS maps as accuracy information.
Ang Li, Ningbo Wang, Manuel Hernández‐Pajares, Ang Liu, Zishen Li, Axel Rülke, Andrzej Krankowski, Heng Yang, Reza Ghoddousi‐Fard, Adam Froń, Zhouyu Zhang   +10 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   +3 more sources