Results 51 to 60 of about 408,077 (211)

Observations of three-dimensional ionospheric plasma properties in a space hurricane

Frontiers in Astronomy and Space Sciences
The space hurricane is a newly discovered large-scale three-dimensional magnetic vortex structure that spans the polar ionosphere and magnetosphere.
Sheng Lu, Zan-Yang Xing, Qing-He Zhang, Qing-He Zhang, Yongliang Zhang, Kjellmar Oksavik, Kjellmar Oksavik, L. R. Lyons, Michael Lockwood, Yu-Zhang Ma, Xiang-Yu Wang, N. Balan, Hui-Gen Yang, Hui-Gen Yang, Yong Wang, Zhong-Xin Deng, Tong Xu, Shu-Ji Sun   +17 more
doaj   +1 more source

Ionospheric challenges of the International Polar Year [PDF]

Eos, Transactions American Geophysical Union, 2007
Fifty years ago, the first International Geophysical Year (IGY) generated a huge step function increase in observations of ionospheric variability associated with the almost continuous geomagnetic activity experienced during the largest solar maximum of the past 100 years. In turn, these observations fueled more than a decade of theoretical advancement
Sojka, Jan Josef, Schunk, Robert W., van Eyken, Tony, Kelly, John, Heinselman, Craig, McCready, Mary   +5 more
openaire   +2 more sources

Lightning electromagnetic emission location using arrival time differencing (LEELA): An introduction to the Met Office's next generation Very Low Frequency lightning location system

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This paper describes the Met Office's new lightning location system LEELA. A brief overview of the upgraded hardware and geolocation algorithms is given. LEELA has improved lightning detection capabilities, especially at night. When comparing LEELA to the previous ATDnet system against ground truths LEELA has 100% storm detection efficiency within 5 km
Graeme Marlton, Mike Protts, Stephen Prust, Edmund Keith Stone, Debbie O'Sullivan, Sue Twelves, Francesco Devoto, Claire Witham   +7 more
wiley   +1 more source

The Polar Ionosphere and the Magnetosphere-Ionosphere Coupling [PDF]

, 1991
EISCAT (the Incoherent System at the northern polar region) data are used in discussion of the magnetosphere-ionosphere coupling. Comparison between samples in geomagnetic quiet days and during magnetic storms shows a significant effect of the basic ...
Minyun, Zi, Changshou, Shen
core   +1 more source

Suprathermal electrons in the polar ionosphere [PDF]

Journal of Geophysical Research, 1969
Suprathermal electrons energy distributions as function of magnetic latitude in polar ionosphere obtained by Explorer 31 satellite ...
openaire   +1 more source

Digital Twin‐Based Optimization of Service Availability in LEO Mega Constellations Considering Handover Delays in Open RAN

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT As non‐terrestrial networks (NTNs) become integral to future 6G systems, ensuring seamless connectivity and service continuity over low Earth orbit (LEO) satellite constellations is essential. This work investigates the impact of open radio access network (RAN) functional splits on handover performance in NTNs, focusing on minimizing service ...
Siva Satya Sri Ganesh Seeram, Luca Feltrin, Mustafa Ozger, Cicek Cavdar   +3 more
wiley   +1 more source

Building a Continental‐Scale Geodetic Network: The Plate Boundary Observatory (PBO)

Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Abstract The Plate Boundary Observatory (PBO) transformed the use of geodesy in North America to study crustal deformation and plate boundary processes by establishing a continental‐scale, standardized, open‐access geodetic network. Built and operated by UNAVCO between 2003 and 2018 as part of the National Science Foundation (NSF)‐funded EarthScope ...
Emily E. Zawacki, Michael E. Jackson, Glen S. Mattioli, David J. Mencin, Karl Feaux, Donna J. Charlevoix   +5 more
wiley   +1 more source

Saturn's equinoctial auroras [PDF]

, 2009
We present the first images of Saturn's conjugate equinoctial auroras, obtained in early 2009 using the Hubble Space Telescope. We show that the radius of the northern auroral oval is ∼1.5° smaller than the southern, indicating that Saturn's polar ...
Stallard, T. S., Badman, S. V., Crary, F. J., Wannawichian, S., Pryor, W. R., Mitchell, D. G., Gérard, J.-c., Grodent, D., Dougherty, M. K., Clarke, J. T., Cowley, S. W. H., Bunce, E. J., Kurth, W. S., Nichols, J. D., Talboys, D. L., Hansen, K. C.   +15 more
core   +2 more sources

Persistence and Dynamics of an Sq‐like Mid‐Latitude Current Vortex During the May 2024 Superstorm

Geophysical Research Letters, Volume 53, Issue 21, 16 November 2026.
Abstract The solar quiet (Sq) current system describes the mid‐latitude equivalent current under quiet geomagnetic conditions, but whether an Sq‐like vortex persists during intense storms remains unclear. Using dense East Asian magnetometer observations, including the Chinese Meridian Project, we reconstruct the storm‐time ionospheric equivalent ...
Fengjue Wang, Chao Xiong, Yunliang Zhou, Yixun Zhu, Yuyang Huang, Baohua Sun, Bohao Qian, Simin Wang, LinLin Li, Shuji Abe, Akimasa Yoshikawa   +10 more
wiley   +1 more source

Dynamic Drivers of TIFe Diurnal Cycle in Antarctica [PDF]

EPJ Web of Conferences, 2020
The discovery of the thermosphere-ionosphere Fe (TIFe) layers has opened a door to exploring the least understood thermosphere and ionosphere region between 100 and 200 km with ground-based lidar instruments. The characteristics of the polar TIFe layers,
Yu Zhibin, Chu Xinzhao, Lu Xian, Chen Cao   +3 more
doaj   +1 more source