Results 61 to 70 of about 5,388 (217)

Multilayered Sporadic‐E Response to the Annular Solar Eclipse on June 21, 2020

Space Weather, 2021
A moon shadow of annular solar eclipse passed through East Asia in the afternoon on June 21, 2020, which was a good opportunity to study the rapid ionospheric response to the solar radiation variations. In the study, the high‐frequency echoes recorded by
Jin Wang, Xiaomin Zuo, Yang‐Yi Sun, Tao Yu, Yungang Wang, Lihui Qiu, Tian Mao, XiangXiang Yan, Na Yang, Yifan qi, Jiuhou Lei, Lingfeng Sun, Biqiang Zhao   +12 more
doaj   +1 more source

Topside Ionosphere and Plasmasphere Modelling Using GNSS Radio Occultation and POD Data

Remote Sensing, 2021
A 3D-model approach has been developed to describe the electron density of the topside ionosphere and plasmasphere based on Global Navigation Satellite System (GNSS) measurements onboard low Earth orbit satellites.
Fabricio S. Prol, M. Mainul Hoque
doaj   +1 more source

Ionosonde Data Analysis in Relation to the 2016 Central Italian Earthquakes

, 2019
Ionospheric characteristics and crustal earthquakes that occurred in 2016 next to the town of Amatrice, Italy are studied together with the previous events that took place from 1984 to 2009 in Central Italy.
A. Ippolito, L. Perrone, A. De Santis, D. Sabbagh   +3 more
semanticscholar   +1 more source

Comparison of IRI‐2016 F2 Layer Model Parameters with Ionosonde Measurements

Journal of Geophysical Research - Space Physics, 2019
International Reference Ionosphere (IRI) is the international standard ionospheric climatic model. Since the original formation of the international task force in 1970s, the IRI model has been continuously improved by ingesting developments in research ...
F. Arıkan, U. Sezen, T. Gulyaeva
semanticscholar   +1 more source

High Latitude Thermosphere and Ionosphere Density Response to the May 2024 Geomagnetic Storm Observed by the LLITED CubeSat Mission

Journal of Geophysical Research: Space Physics, Volume 131, Issue 7, July 2026.
Abstract The May 2024 G5 geomagnetic storm produced significant disturbances in the ionosphere and thermosphere, particularly at high latitudes. Using high‐resolution in situ ion and neutral density measurements from the NASA Low‐Latitude Ionosphere/Thermosphere Enhancements in Density (LLITED) CubeSat at 430 km altitude, this study documents notable ...
Diana J. Swanson, James H. Clemmons, Huixin Liu, Rebecca Bishop, Shantanab Debchoudhury, Aroh Barjatya, Asti Bhatt   +6 more
wiley   +1 more source

Quantifying Errors in the Midpoint Transform Applied to Oblique Ionograms

Radio Science, Volume 61, Issue 7, July 2026.
Abstract It is important to specify the state of the ionosphere for Over‐the‐Horizon communications and surveillance. Both vertical and oblique ionograms provide valuable data to this end. Oblique ionograms can probe the ionosphere in locations where it would be impractical to build a vertical ionosonde, but their measurements are not straightforward ...
Joe Hughes, L. J. Nickisch, Sergey Fridman, Gregory Bullock, Shawn Kraut, Matt Hogan, Victoriya Forsythe   +6 more
wiley   +1 more source

Seismoionospheric anomalies associated with earthquakes from the analysis of the ionosonde data

Journal of Atmospheric and Solar-Terrestrial Physics, 2018
Previous researchers have reported the earthquakes (EQs) induced ionospheric abnormalities, such as electron density depletion and/or enhancement, which they claimed were related to the impending EQs.
Junaid Ahmed, Munawar Shah, Waqar Ali Zafar, M. Amin, Talat Iqbal   +4 more
semanticscholar   +1 more source

Global Effect of Long‐Lasting 07–12 October 2024 Geomagnetic Storms During the Transition From a Strong (G3) to a Severe (G4) on the Geomagnetic Field and Ionospheric Parameters Distribution

Space Weather, Volume 24, Issue 7, July 2026.
Abstract This study investigates the co‐evolution of geomagnetic field disturbances with ionospheric parameters and their characteristic latitudinal signatures by conducting a location and time‐dependent analysis of the 07–12 October 2024 events, to fill crucial gaps in understanding the coupled response of the magnetosphere‐ionosphere system. This has
Yekoye Asmare Tariku
wiley   +1 more source

Observation of Short‐Period Ionospheric Disturbances Using a Portable Digital Ionosonde at Sanya

Radio Science, 2018
A number of ionosondes have been operated in China to detect ionospheric disturbances for many years. These ionosondes, however, are not very suitable for the short‐period (5 min).
Jiaping Lan, B. Ning, Guozhu Li, Zhengping Zhu, Lianhuan Hu, Wenjie Sun   +5 more
semanticscholar   +1 more source

Development and Cancellation of Long‐Duration Positive Ionospheric Storms: Both Changes of the F2‐Layer Peak Height and O/N2 Ratio Can Be Decisive

Space Weather, Volume 24, Issue 7, July 2026.
Abstract For decades, two competing hypotheses on the key drivers of mid‐latitude long‐duration positive ionospheric storms (LDPS) have been considered: (a) an increase of the F2‐layer peak height (hmF2) and (b) an increase in the atomic oxygen to molecular nitrogen density ratio (O/N2).
D. V. Kotov, M. O. Reznychenko, P. G. Richards, O. V. Bogomaz, L. P. Goncharenko, L. J. Paxton, M. Hernández‐Pajares, A. I. Reznychenko, D. P. Shkonda, V. V. Barabash, L. Ya. Emelyanov, I. F. Domnin, A. Ye. Miroshnikov, V. P. Burmaka, D. A. Dzyubanov, Yu. I. Podyachiy   +15 more
wiley   +1 more source