Results 31 to 40 of about 853 (193)

Spectral analysis of IAR oscillations to determine the value and variability of the peak electron density NmF2

Solar-Terrestrial Physics, 2023
This methodical paper explores the possibility of estimating the peak electron density of the F2-region of the ionosphere (NmF2) under different conditions, using data on the frequency of spectral bands (harmonics) of the ionospheric Alfvén resonator ...
Potapov A. S., Polyushkina T. N., Guglielmi A. V., Ratovsky K. G., Moskalev I. S.   +4 more
doaj   +1 more source

Inferring the Ionospheric State With the Far Ultraviolet Imager on the Fengyun‐4C Geostationary Satellite: Retrieval Algorithm and Verification

Earth and Space Science, 2023
The Multiband Ultraviolet Spectrum Imager (MUSI) is an optical remote sensing instrument scheduled to launch on the Fengyun‐4C meteorological satellite in 2024. MUSI is designed to measure the airglow emissions between ∼120 and 160 nm above the East Asia
Jianqi Qin, Hang Liu, Xiaohan Yin, Menghang Liu, Jingsong Wang, Tian Mao, Mohan Liu, Xiaoxin Zhang, Weiguo Zong, Feng Lu, Liping Fu   +10 more
doaj   +1 more source

Model of mid-and low-latitude F region ionosphere and protonosphere

Geofísica Internacional, 1981
En este trabajo se resuelven las ecuaciones combinadas de continuidad y momentum de los iones O+ y H+, en la región F y la protonosfera, para una estación de latitud media (Arecibo) y una estación de latitud baja (Jicamarca) con el fin de investigar el ...
A. Tan, S.T. Wu
doaj   +1 more source

Global morphology of night-time NmF2 enhancements [PDF]

, 2002
An overall statistical study of night-time enhancements of NmF2 has been carried out. All available foF2 observations since 1955 at 53 ionosonde stations distributed worldwide in the latitude range fgeom = 15° - 60° were used in the analysis ...
A. F. Farelo, M. Herraiz, A. V. Mikhailov   +2 more
core   +3 more sources

Behaviour of the ionospheric F2-layer during geomagnetic storms in southern middle latitudes

Geofísica Internacional, 1996
En este trabajo se estudia el comportamiento de la capa F2 durante dos tormentas geomagnéticas usándose valores horarios de NmF2 y h'F2 de cuatro estaciones del hemisferio sur.
Gustavo Adolfo Mansilla
doaj   +1 more source

Variability of NmF2 and its correlation with solar and geomagnetic variations at an equatorial station in the African sector [PDF]

, 2020
180-196This study focuses on the variability of NmF2 and the impact of the solar and geomagnetic activity on the variability of NmF2 over Ouagadougou, an equatorial ionisation anomaly station in the African sector. The daily hourly values of the critical
Kazeem, Abdullahi Kikelomo, Rabiu, Akeem Babatunde, Olawepo, Adeniji Olayinka   +2 more
core  

Observation of the ionosphere by ionosondes in the Southern and Northern hemispheres during geospace events in October 2021

Український антарктичний журнал, 2022
The paper presents the results of ionospheric observations performed over the Ukrainian Antarctic Akademik Vernadsky station and Millstone Hill (USA).
M. Reznychenko, O. Bogomaz, D. Kotov, T. Zhivolup, O. Koloskov, V. Lisachenko   +5 more
doaj   +1 more source

Long‐Term Trends in the Ionospheric Equivalent Slab Thickness as a Proxy of Climate Change in the Ionosphere

Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.
Abstract Global warming warms the lower atmosphere, but cools and contracts the upper atmosphere. These changes also affect the ionosphere, altering the vertical distribution of plasma through changes in the plasma scale height. Here, we use ionospheric equivalent slab thickness (τ) multidecadal time series, derived through observations from co‐located
A. Pignalberi, T. Alberti
wiley   +1 more source

Seasonal variations in daily maximum of electron density in the F2 ionospheric layer depending on solar activity according to the Tomsk ionospheric station data

Solar-Terrestrial Physics
The paper analyzes variations in the maximum electron density of the F2 ionospheric layer (NmF2), using data from the Tomsk ionospheric station for the period from 1947 to 2024, including seven 11-year solar cycles, with the aim of identifying seasonal ...
Kolesnik Sergey, Borisevich Alexei
doaj   +1 more source

Ionospheric response to the February 27, 2023 intense geomagnetic storm over Kharkiv and the Akademik Vernadsky station

Український антарктичний журнал
This study aims to investigate ionospheric responses to the February 27, 2023 intense geomagnetic storm over Kharkiv and the Akademik Vernadsky (hereinafter – Vernadsky) station using ionosondes.
Maryna Reznychenko, Dmytro Kotov, Oleksandr Bogomaz, Taras Zhivolup, Artem Reznychenko, Andriy Zalizovski, Oleksandr Koloskov, Volodymyr Lisachenko, Dmytro Dzyubanov   +8 more
doaj   +1 more source