Results 61 to 70 of about 451,064 (205)

Mesoscale ionospheric electrodynamics of omega bands determined from ground-based electromagnetic and satellite optical observations [PDF]

, 2005
International audienceWe present ground-based electromagnetic data from the MIRACLE and BEAR networks and satellite optical observations from the UVI and PIXIE instruments on the Polar satellite of an omega band event over Northern Scandinavia on 26 June
Viljanen, A., Aksnes, A., A. Aksnes, J. Stadsnes, N. Østgaard, G. A. Germany, O. Amm, G.A. Germany, Østgaard, N., A. Viljanen, R.R. Vondrak, Lu, G., Stadsnes, J., R. R. Vondrak, Amm, O., Vondrak, R.R., Germany, G.A., G. Lu   +17 more
core   +2 more sources

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

The Impacts of Tropospheric Gravity Wave‐Generated MSTIDs on Skywaves at Mid‐latitude North American Sector Observed and Modeled Using SuperDARN HF Radars

Radio Science, Volume 61, Issue 9, September 2026.
Abstract Trans‐ionospheric high frequency (HF: 3–30 MHz) response to atmospheric gravity waves (GWs) is studied in the middle‐latitude ionosphere in relation to thunderstorm activity. SuperDARN HF radar observations are compared against the model simulations to quantify the impact of GW‐generated medium‐scale traveling ionospheric disturbances (MSTID ...
S. Chakraborty, P. A. Inchin, S. Debchoudhury, B. Bergsson, M. Zettergren, J. M. Ruohoniemi   +5 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

Correlation of High‐Latitude Scintillation With Auroral Precipitation: Case Studies Using GNSS Radio Occultation Data From PlanetiQ

Space Weather, Volume 24, Issue 9, September 2026.
Abstract This study presents a survey of high‐latitude ionospheric scintillation using GNSS radio occultation (RO) data from the PlanetiQ satellite. The analysis examines 483 high‐latitude RO tracks between January and May 2023, with 371 tracks exhibiting scintillation events.
Margaret W. Chen, Endawoke Yizengaw, James H. Hecht, Paul Straus, Charles S. Carrano, Tibor Durgonics, Keith M. Groves   +6 more
wiley   +1 more source

Exploring the Applicability of Three Popular Models for Predicting the Received Field Strength of HF Sky‐Wave Propagation and Communication

Space Weather, Volume 24, Issue 9, September 2026.
Abstract High‐frequency (HF) radio signals rely on ionospheric reflection and refraction to enable long‐range and transcontinental transmission, making them essential for military command, emergency response, and strategic communications. The received field strength is a key parameter for quantifying propagation conditions and optimizing HF circuit ...
Zhanfeng Zhu, Qiao Yu, Yafei Shi, Cheng Yang, Jieqing Fan, Jian Wang   +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

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

First Observational Results of the Neutral Gas Mass Spectrometer Onboard the China's TianMu‐1 Constellation

Earth and Space Science, Volume 13, Issue 9, September 2026.
Abstract In situ observations of thermospheric composition have long been scarce, limiting our understanding of the upper atmosphere and its response to space weather. This study focuses on the Neutral Gas Mass Spectrometer (NGMS) onboard the TM19 and TM20 satellites of China's TianMu‐1 constellation, presenting the first systematic elaboration of its ...
Jiangzhao Ai, Yongping Li, Xianguo Zhang, Yueqiang Sun, Hong Zeng, Weihua Bai, Hongbo Wang, Xiaoliang Zheng, Jia Li, Yujie Wang, Yuanyuan Cao, Xinchun Tang   +11 more
wiley   +1 more source

A multi-instrumental study of ionospheric disturbances associated with the 2024 Mw 7.4 Hualien earthquake

Earth, Planets and Space
This study investigates the ionospheric disturbances triggered by the 2024 Mw 7.4 Hualien earthquake using a dense network of ground-based GNSS receivers and space-borne FORMOSAT-7/COSMIC-2 (F7/C2) radio occultation (RO) data.
Chia-Hung Chen, Yung-Ming Wang, I.-Te Lee   +2 more
doaj   +1 more source