Results 91 to 100 of about 18,179 (315)

Unveiling Ionospheric Response to the May 2024 Superstorm With Low‐Earth‐Orbit Satellite Observations

Space Weather, Volume 23, Issue 4, April 2025.
Abstract The space weather event on 10–11 May 2024 was a high‐impact geomagnetic storm, resulting in a SYM‐H index decrease to −518 nT, the lowest level registered in several decades. We investigated the response of the Earth's ionosphere during the main phase of this storm using a comprehensive data set of ionospheric observations (in situ plasma ...
Irina Zakharenkova, Iurii Cherniak, John J. Braun, Jan‐Peter Weiss, Qian Wu, Teresa VanHove, Douglas Hunt, Maggie Sleziak‐Sallee   +7 more
wiley   +1 more source

Integrated positioning method of roadheader based on inertial technology

Meitan kexue jishu
In view of the environmental constraints such as long working cycle and large vibration amplitude during the cutting of the roadheader in the fully mechanized excavation face, it is difficult for a single inertial navigation system to realize autonomous,
Lingfei SUN, Ya LIU, Jiguo PENG, Muyi YANG, Zhiyuan MA, Kun ZHANG   +5 more
doaj   +1 more source

The direct application and potential indirect contribution of space law for solar radiation modification governance

Review of European, Comparative &International Environmental Law, Volume 34, Issue 1, Page 170-180, April 2025.
Abstract Solar radiation modification (SRM) reflects sunlight back into space and could rapidly cool Earth, potentially reducing the harms of dangerous climate change. Current international law fails to directly and comprehensively address the transboundary, regional and global governance challenges that SRM presents.
Rachel Neef
wiley   +1 more source

First Observation of Ionospheric Plasma Bubble Signatures by Ca+ Lidar at Low Latitude

Geophysical Research Letters, Volume 52, Issue 6, 28 March 2025.
Abstract Ionospheric plasma bubbles refer to density depletion structures in the ionosphere, which are usually seen in the electron density profiles observed by radar, and have never been observed in the density profiles of metallic ions. In this letter, we report the first observation of plasma bubble signatures captured by lidar, manifested as ...
Wenjie Sun, Jing Jiao, Guotao Yang, Guozhu Li, Haiyong Xie, Biqiang Zhao, Yajun Zhu, Xiao Wang, Lianhuan Hu, Haoran Zheng, Bing Zheng, Lifang Du, Chunxiao Yan   +12 more
wiley   +1 more source

Near-real-time VTEC maps: new contribution for Latin America Space Weather [PDF]

, 2019
The development of regional services able to provide ionospheric vertical totalelectron content (VTEC) maps and ionospheric indexes with a high spatialresolution, and in near-real-time, are of great importance for both civilianapplications and the research community. We provide here the methodolo-gies, and an assessment, of such a system.
arxiv   +1 more source

A ground-based dataset and a diffusion model for on-orbit low-light image enhancement [PDF]

arXiv, 2023
On-orbit service is important for maintaining the sustainability of space environment. Space-based visible camera is an economical and lightweight sensor for situation awareness during on-orbit service. However, it can be easily affected by the low illumination environment. Recently, deep learning has achieved remarkable success in image enhancement of
arxiv  

First assessment of geophysical sensitivities from spaceborne Galileo and BeiDou GNSS-Reflectometry data collected by the UK TechDemoSat-1 Mission [PDF]

, 2020
The UK’s TechDemoSat-1 (TDS-1), launched 2014, has demonstrated the use of global positioning system (GPS) signals for monitoring ocean winds and sea ice.
Foti, Giuseppe, Gommenginger, Christine, Hammond, Matthew L., King, Lucinda, Rawlinson, Jonathan, Roselló, Josep, Srokosz, Meric, Unwin, Martin   +7 more
core   +1 more source

Deep Learning Driven Detection of Tsunami Related Internal GravityWaves: a path towards open-ocean natural hazards detection [PDF]

arXiv, 2023
Tsunamis can trigger internal gravity waves (IGWs) in the ionosphere, perturbing the Total Electron Content (TEC) - referred to as Traveling Ionospheric Disturbances (TIDs) that are detectable through the Global Navigation Satellite System (GNSS). The GNSS are constellations of satellites providing signals from Earth orbit - Europe's Galileo, the ...
arxiv  

Direct Evidence of the Lower Atmosphere Perturbations Producing Abnormal Ionospheric Longitudinal Gradients During Quiescent Geomagnetic Conditions

Geophysical Research Letters, Volume 52, Issue 5, 16 March 2025.
Abstract An unusual case of a large ionospheric longitudinal gradient in East Asia on 11 May 2021 occurred during a geomagnetically‐quiet period. It shows the largest east‐west difference in electron density at Yamagawa and Wuhan stations when Kp < 2 for 13:00–17:00 LT in 2021.
Yuyan Jin, Biqiang Zhao, Xu Zhou, Honglian Hao, Guozhu Li, Xinan Yue, Zishen Li   +6 more
wiley   +1 more source

Crop-GPA: an integrated platform of crop gene-phenotype associations

npj Systems Biology and Applications
With the increasing availability of large-scale biology data in crop plants, there is an urgent demand for a versatile platform that fully mines and utilizes the data for modern molecular breeding.
Yujia Gao, Qian Zhou, Jiaxin Luo, Chuan Xia, Youhua Zhang, Zhenyu Yue   +5 more
doaj   +1 more source