Results 81 to 90 of about 5,479 (219)
Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.Abstract Variations in nighttime airglow at mid‐latitudes during geomagnetic disturbances reflect the propagation of atmospheric and plasma disturbances from polar heating as well as local chemical processes. However, their detailed mechanisms remain unclear.
Y. Hotta +4 more
wiley +1 more source
D- and F-Region Ionospheric Response to the Severe Geomagnetic Storm of April 2023
AtmosphereThis study investigates the impact on the Earth’s ionosphere of a severe geomagnetic storm (Dst ∼ −212 nT) that began on 23 April 2023 at around 17:37 UT according to very low-frequency (VLF, 3–30 kHz) or low-frequency (LF, 30–300 kHz) radio signals and ...
Arnab Sen +3 more
doaj +1 more source
Assessment of Global Ionospheric Maps Performance by Means of Ionosonde Data
Remote Sensing, 2020 This work presents a new method for assessing global ionospheric maps (GIM) using ionosonde data. The method is based on the critical frequency at the F2 layer directly measured by ionosondes to validate VTEC (vertical total electron content) values from
Gabriel O. Jerez +4 more
doaj +1 more source
Method and apparatus for calibrating the ionosphere and application to surveillance of geophysical events [PDF]
, 1984 The columnar electron content of the ionosphere between a spacecraft and a receiver is measured in realtime by cross correlating two coherently modulated signals transmitted at different frequencies (L1,L2) from the spacecraft to the receiver using a ...
Macdoran, P. F.
core +1 more source
Analysis of Ionospheric Correlation Time Variations Based on Long‐Term GIMs Data
Space Weather, Volume 24, Issue 3, March 2026.Abstract Ionospheric correlation time measures the temporal correlation of the ionosphere and is an important parameter for characterizing the temporal connection of ionospheric variability. Ionospheric correlation times are obtained from high resolution global ionospheric TEC maps spanning 2005 to 2020.
Sicheng Wang, Sheng Guo, Sixun Huang
wiley +1 more source
Neutral winds derived from IRI parameters and from the HWM87 wind model for the sundial campaign of September, 1986 [PDF]
Meridional neutral winds derived from the height of the maximum ionization of the F2 layer are compared with values from results of the HWM87 empirical neutral wind model. The time period considered is the SUNDIAL-2 campaign, 21 Sept. through 5 Oct. 1986.
Hedin, A. E. +4 more
core +1 more source
Space Weather, Volume 24, Issue 3, March 2026.Abstract The sporadic E (Es) layer, a key manifestation of ionosphere‐neutral atmosphere coupling, is highly sensitive to geomagnetic storms. Using more than 25,000 daily radio occultation profiles from the Tianmu‐1 and COSMIC‐2 constellations, this study investigates the global response of the Es layer to the May 2024 storm.
Sheng Guo +4 more
wiley +1 more source
Учёные записки Казанского университета: Серия Физико-математические науки, 2017 To analyze midlatitude medium-scale traveling ionospheric disturbances (MSTIDs), the sufficiently dense network of GNSS receivers (more than 150 ground-based stations) have been used. For the first time, daytime MSTIDs in the form of their main signature
R.O. Sherstyukov, A.D. Akchurin
doaj
Food security dynamics in Oman: VECM approach [PDF]
, 2020 The paper examines the determinants of food security in Oman during the period 1980-2019. It investigates the influence of population growth rate and GDP per capita on food security.
Devesh, Sonal +1 more
core
Space Weather, Volume 24, Issue 3, March 2026.Abstract Modeling the high‐latitude ionosphere‐thermosphere system is imperative to understanding the impacts of space weather on modern technology, such as communications and navigation systems. At low‐ and mid‐latitudes, physics‐based and empirical models are well‐developed and capture the variability of the ionosphere to a good degree of accuracy ...
Emma‐Claire Gurney +3 more
wiley +1 more source