Results 51 to 60 of about 425 (190)

Traveling ionospheric disturbances detected in the FRONT Campaign [PDF]

Geophysical Research Letters, 2001
The F‐region Radio and Optical measurement of Nighttime TID (FRONT) campaign was conducted to clarify the non‐classical features of traveling ionospheric disturbances (TIDs) at mid‐latitudes in May, 1998 and August, 1999. A cluster of all‐sky CCD cameras and a GPS receiver network observed a wide area of the ionosphere over Japan to detect the spatial ...
A. Saito, M. Nishimura, M. Yamamoto, S. Fukao, M. Kubota, K. Shiokawa, Y. Otsuka, T. Tsugawa, T. Ogawa, M. Ishii, T. Sakanoi, S. Miyazaki   +11 more
openaire   +1 more source

Gravity Wave Activity in the Stratosphere and Mesosphere During Hurricane Sam

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract Multi‐instrument observations of gravity wave (GW) activity during Hurricane Sam (2021) were made using AIRS (Atmospheric Infrared Sounder) satellite data, ERA5 reanalysis, and TIMED/SABER temperature profiles. Two GW extraction methods, vertical high‐pass filtering and empirical mode decomposition, were applied to quantify wave‐induced ...
Ayden L. S. Gann, Erdal Yiğit
wiley   +1 more source

Study on Ionospheric Depletion and Traveling Ionospheric Disturbances Induced by Rocket Launches Using Multi-Source GNSS Observations and the MRMIT Method

Remote Sensing
Rocket launches constitute a major anthropogenic source of disturbance in the near-Earth space environment, inducing significant ionospheric perturbations through both chemical and dynamic mechanisms.
Jianghe Chen, Pan Xiong, Ming Ou, Ting Zhang, Xiaoran Zhang, Yuqi Lin, Jiahao Zhu   +6 more
doaj   +1 more source

Gravity Wave Influences on MSTID Climatology Over CONUS: WACCM‐X Year‐Long Simulation and GNSS Long‐Term Observation

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract Medium‐Scale Traveling Ionospheric Disturbances (MSTIDs) are prominent wave‐like structures in the ionosphere, with complex generation mechanisms involving both atmospheric gravity waves (GWs) and electrodynamic instabilities such as the Perkins instability (PI).
Jing Liu, Shun‐Rong Zhang, Hanli Liu, Anthea J. Coster, Philip J. Erickson   +4 more
wiley   +1 more source

Penetration of internal gravity waveguide modes into the upper atmosphere

Solar-Terrestrial Physics, 2016
The paper describes internal gravity waveguide modes, using dissipative solutions above the source. We compare such a description with an accurate approach and a WKB approximation for dissipationless equations.
Rudenko G.V., Dmitrienko I.S.
doaj   +1 more source

Isolated ionospheric disturbances as deduced from global GPS network [PDF]

Annales Geophysicae, 2004
We investigate an unusual class of medium-scale traveling ionospheric disturbances of the nonwave type, isolated ionospheric disturbances (IIDs) that manifest themselves in total electron content (TEC) variations in the form of single aperiodic ...
E. L. Afraimovich, E. I. Astafieva, S. V. Voyeikov   +2 more
doaj   +1 more source

Synthetic‐Data‐Driven Supervised Learning for Pixel‐Wise Recognition of Ionogram Layer Traces

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.
Abstract The significance of automatic ionogram data interpretation is growing with the increasing number of ionosondes operating at minute‐level cadence. In recent years, deep‐learning models have substantially advanced ionogram pattern recognition. However, they typically require extensive labeled ionospheric data sets for training.
Ruslan Sherstyukov, Alexander Kozlovsky, Thomas Ulich, Samson Moges, Thomas Leyser   +4 more
wiley   +1 more source

Observations of poleward-propagating large-scale traveling ionospheric disturbances in southern China [PDF]

Annales Geophysicae, 2013
We report here on two cases of poleward-propagating large-scale traveling ionospheric disturbances (LSTIDs) in China during a medium-scale storm between 27 May and 1 June 2011.
F. Ding, F. Ding, W. Wan, W. Wan, B. Ning, B. Ning, B. Zhao, B. Zhao, Q. Li, Y. Wang, L. Hu, L. Hu, R. Zhang, B. Xiong, B. Xiong   +14 more
doaj   +1 more source

Machine Learning for Local Detection of Separators in Three‐Dimensional Magnetic Fields

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.
Abstract Magnetic reconnection is a major plasma phenomenon occurring in various key environments ranging from the Sun and near‐Earth space to astrophysical plasmas. While magnetic reconnection is relatively well‐understood under two‐dimensional (2D) settings, it remains challenging to characterize in three‐dimensional (3D) magnetic fields.
Fanni Franssila, Markku Alho, Ioanna Bouri, Daniel Holmberg, Minna Palmroth, Teemu Roos   +5 more
wiley   +1 more source

Ionospheric Disturbances Triggered by the Mw7.6 Earthquake off the Coast of El Salvador on 13 January 2001

Terrestrial, Atmospheric and Oceanic Sciences, 2006
A network of five ground-based receivers of the global positioning sys- tem (GPS) was use to detect seismo-ionospheric disturbances in the total elec- tron content (TEC) triggered by the 13 January 2001 El Salvador Mw 7.6 earthquake.
Ting-Kuo Jung, Jann-Yenq Liu, Ho-Fang Tsai, Bor-Shouh Huang, Cheng-Horng Lin, Shui-Beih Yu, Yih-Shiung Yeh   +6 more
doaj   +1 more source