Results 31 to 40 of about 7,987 (248)

Numerical modeling of spatial perturbations of the ionosphere from local tropospheric sources

Solar-Terrestrial Physics
The paper presents the results of modeling of spatial and temporal perturbations of the thermosphere during a strong meteorological disturbance. The modeling was performed using the Global Self-Consistent Model of the thermosphere, ionosphere, and ...
Karpov Ivan, Bessarab Fedor, Borchevkina Olga   +2 more
doaj   +1 more source

Detection of wave activity in measurements of thermospheric vertical winds and temperatures at subauroral latitudes

Frontiers in Astronomy and Space Sciences
The need for high precision measurements of vertical winds with uncertainties on the scale of 3–5 m s−1 and a temporal cadence of 1–2 min to achieve detection of gravity wave (GW) structure has made it exceedingly difficult to study the response of the ...
Anneliese L. Schmidt, John W. Meriwether, Matthew B. Cooper, Andrew J. Gerrard, Lindsay V. Goodwin, Shun-Rong Zhang, Ying Ye   +6 more
doaj   +1 more source

Validation of Auric Model with EUV/FUV Dayglow Observation of STP78-1 Satellite [PDF]

Journal of Astronomy and Space Sciences, 2007
We carried out a validation study on AURIC FUV/EUV dayglow calculation with OII 834AA, OI 989AA, OI 1027AA, NII 1085AA, NI 1134AA, NI 1200AA, OI 1304AA, OI 1356AA dayglows observed by STP78-1 satellite.
Mi Ji Kang, Jeong-Han Kim, Yong Ha Kim
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

Drag Coefficient Constraints for Space Weather Observations in the Upper Thermosphere

Space Weather, 2022
The space weather research community relies heavily on thermospheric density data to understand long‐term thermospheric variability, construct assimilative, empirical, and semiempirical global atmospheric models and validate model performance. One of the
Valerie Bernstein, Marcin Pilinski
doaj   +1 more source

Structure, Propagation and Variability of the 5‐Day Rossby‐Haurwitz Wave

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 15, 16 August 2026.
Abstract The 5‐day wave is the gravest free Rossby mode predicted by the Laplace shallow water equations, with a latitudinally symmetric, zonal wavenumber one theoretical structure in geopotential extending from pole to pole. It propagates westward along the equator at about 98 m s−1 ${\mathrm{s}}^{-1}$ and was first observed in surface pressure data ...
G. N. Kiladis, R. A. Madden
wiley   +1 more source

Science Through Machine Learning: Quantification of Post‐Storm Thermospheric Cooling

Space Weather, 2022
Machine learning (ML) models are universal function approximators and—if used correctly—can summarize the information content of observational data sets in a functional form for scientific and engineering applications.
Richard J. Licata, Piyush M. Mehta, Daniel R. Weimer, Douglas P. Drob, W. Kent Tobiska, Jean Yoshii   +5 more
doaj   +1 more source

Empirical Assessment of Storm‐Time Thermospheric Density Inversion Methods From LEO POD Data

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract Thermospheric mass density is one of the largest sources of operational uncertainty for spacecraft in low Earth orbit, particularly during geomagnetic storms. The growing population of Global Navigation Satellite System‐equipped satellites presents a data set of opportunity: precise orbit determination (POD) data streams can be used to ...
Charles Constant, Indigo Brownhall, Anasuya Aruliah, Marek Ziebart, Santosh Bhattarai   +4 more
wiley   +1 more source

Seasonal and Altitude Dependence of Thermospheric Metastable Helium Densities Measured by Fluorescence Lidar

Geophysical Research Letters
Airglow originating from metastable helium He(23S) at 1,083 nm has been used to study the upper thermosphere since its discovery in 1959, yielding insights into, for example, solar EUV intensities and thermospheric photoelectron densities.
C. Geach, B. Kaifler
doaj   +1 more source

Impacts of Different Causes on the Inter‐Hemispheric Asymmetry of Ionosphere‐Thermosphere System at Mid‐ and High‐Latitudes: GITM Simulations

Space Weather, 2021
In this study, the Global Ionosphere Thermosphere Model is utilized to investigate the inter‐hemispheric asymmetry in the ionosphere‐thermosphere (I‐T) system at mid‐ and high‐latitudes (|geographic latitude| > 45°) associated with inter‐hemispheric ...
Yu Hong, Yue Deng, Qingyu Zhu, Astrid Maute, Cheng Sheng, Daniel Welling, Ramon Lopez   +6 more
doaj   +1 more source