Results 31 to 40 of about 1,515 (120)

Forecasting Equatorial Plasma Bubbles From Precursor TEC Signatures Observed by C/NOFS

Space Weather, Volume 24, Issue 1, January 2026.
Abstract This study investigates the potential of localized total electron content (TEC) perturbation measurements, possibly associated with bottomside upwelling of the F‐layer, as precursors for forecasting ionospheric plasma irregularities, particularly the equatorial plasma bubbles (EPBs).
S. K. Das, C. Stolle, Y. Yamazaki, T. Yokoyama, M. Yamamoto, S. Perwitasari   +5 more
wiley   +1 more source

Electron distribution in the ionosphere [PDF]

, 1965
Ionospheric electron density profiles for D, E, and F ...
Bourdeau, R. E.
core   +1 more source

Upwelling Metallic Ions Producing Valley Region Irregularities Over Low Latitude During the 2025 New Year Magnetic Storm

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract Valley region irregularities (VRIs) have been previously investigated using radar, ionosonde, and rocket‐borne in situ observations. In this paper, based on a joint observational experiment by lidar and radars performed in Hainan, China, we report a case of low‐latitude VRIs generated in association with uplifted metallic ions for the first ...
Jing Jiao, Wenjie Sun, Guozhu Li, Yajun Zhu, Biqiang Zhao, Guotao Yang, Tatsuhiro Yokoyama, Septi Perwitasari, Lianhuan Hu, Jianfei Liu, Haiyong Xie, Zhaoguo Huang, Xiaofei Wu, Chunxiao Yan   +13 more
wiley   +1 more source

Photometric Studies of Auroral Luminosity and its Connection with Some Atmosphere Ionization Phenomena [PDF]

, 1958
The auroral radiation, 3914 AO, received from the entire sky on a horizontal diffusing plate was monitored continuously during the nights of 1955-56 and 1956-57. The 1955-56 data and part of the 1956-57 data were used to obtain a diurnal curve for the
Murcray, W. B.
core  

First Observation of Localized F Region Bottom‐Type Scattering Layer by All‐Sky Radar at Low Latitude

Geophysical Research Letters, Volume 52, Issue 23, 16 December 2025.
Abstract F‐region bottom‐type scattering layers (BSLs) occurring over equatorial and low latitudes may act as the precursor of plasma bubbles, usually observed by narrow‐beam very high frequency radars. However, their spatial features remain unknown due to the radar narrow field‐of‐view.
Wenjie Sun, Guozhu Li, Lianhuan Hu, Biqiang Zhao, Jianfei Liu, Haiyong Xie, Guofeng Dai, Xiukuan Zhao, Yi Li, Baiqi Ning   +9 more
wiley   +1 more source

Radar Polarimetry in Glaciology: Theory, Measurement Techniques, and Scientific Applications for Investigating the Anisotropy of Ice Masses

Reviews of Geophysics, Volume 63, Issue 4, December 2025.
Abstract Dielectric anisotropy in ice alters the propagation of polarized radio waves, so polarimetric radar sounding can be used to survey anisotropic properties of ice masses. Ice anisotropy is either intrinsic, associated with ice‐crystal orientation fabric (COF), or extrinsic, associated with material heterogeneity, such as bubbles, fractures, and ...
Benjamin H. Hills, T. J. Young, David A. Lilien, Esther Babcock, Nicole Bienert, Donald Blankenship, John Bradford, Giancorrado Brighi, Alex Brisbourne, Jørgen Dall, Reinhard Drews, Olaf Eisen, M. Reza Ershadi, Tamara A. Gerber, Nicholas Holschuh, Daniela Jansen, Thomas M. Jordan, Nanna B. Karlsson, Jilu Li, Carlos Martín, Kenichi Matsuoka, Daniel May, Falk M. Oraschewski, John Paden, Nicholas M. Rathmann, Neil Ross, Dustin M. Schroeder, Martin Siegert, Matthew R. Siegfried, Emma Smith, Ole Zeising   +30 more
wiley   +1 more source

GPS scintillation and irregularities at the front of an ionization tongue in the nightside polar ionosphere [PDF]

, 2014
In this paper we study a tongue of ionization (TOI) on 31 October 2011 which stretched across the polar cap from the Canadian dayside sector to Svalbard in the nightside ionosphere. The TOI front arrived over Svalbard around 1930 UT. We have investigated
Alfonsi, Alfonsi, Anghel, Baker, Basu, Basu, Basu, Basu, Beach, Briggs, Buchau, Buchau, Béniguel, Béniguel, Carlson, Carlson, Carlson, Carlson, Carlson, Carlson, Carrano, Carrano, Chisham, Coker, Cousins, De Franceschi, Dungey, Forte, Forte, Forte, Foster, Foster, Foster, Franceschi, Fremouw, Gondarenko, Gondarenko, Greenwald, Grocott, Hey, Hosokawa, Hosokawa, Hosokawa, Keskinen, Kintner, Knudsen, Lehtinen, Lepping, Li, Lockwood, Lockwood, Lorentzen, Lorentzen, Lyons, Millward, Mitchell, Moen, Moen, Moen, Moen, Moen, Mushini, Nishimura, Ogilvie, Oksavik, Oksavik, Oksavik, Ossakow, Prikryl, Prikryl, Prikryl, Romano, Romano, Sato, Spogli, Tiwari, Tsunoda, Weber, Weber, Wickwar, Zhang, Zhang, Zou   +82 more
core   +2 more sources

In Situ Validation of Small‐Scale Spatial Variability in Significant Wave Height Observations From SWOT

Earth and Space Science, Volume 12, Issue 12, December 2025.
Abstract Ocean surface wave climates are shaped by both atmospheric forcing and underlying ocean conditions. Variability in open‐ocean wave heights subsequently reflects complex interactions occurring across a broad range of spatial and temporal scales.
Allison Ho, Jinbo Wang, Bruce Haines, Andy Wu, Scott Stalin   +4 more
wiley   +1 more source

New sounding modes for SuperDARN HF radars [PDF]

, 2001
We have developed several new sounding modes for SuperDARN HF radars to increase operation flexibility ("Nasu" mode, etc.) as well as to obtain both higher time resolution special camping beams data and global convection patterns simultaneously ...
Akira Sessai Yukimatu, Hisao Yamagishi, Natsuo Sato   +2 more
core   +1 more source

Are Cusp‐Aligned Arcs the Equivalent of Auroral Streamers in a Closed Magnetosphere?

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract We present the first observations of a 3‐hour quasi‐periodic intensification of the polar auroras during a prolonged interval of strongly‐northward interplanetary magnetic field (IMF). This takes the form of a localized spot of auroral emission that appears near the pole which subsequently spreads sunward and antisunward to produce a sun ...
S. E. Milan, M. K. Mooney, G. E. Bower, G. Kennedy, X.‐Y. Wang, B. Hubert, M. R. Hairston, L. J. Paxton   +7 more
wiley   +1 more source