Results 51 to 60 of about 11,342 (218)

Mesosphere and Lower Thermosphere

, 2023
The mesosphere and low thermosphere (MLT) region is defined as the region of the atmosphere between approximately 60 and 110 km in height [...
Zhibin Yu, Chen Zhou
core   +1 more source

The operational and research DTM-2020 thermosphere models

Journal of Space Weather and Space Climate, 2021
Aims: The semi-empirical Drag Temperature Models (DTM) predict the Earth’s thermosphere’s temperature, density, and composition, especially for orbit computation purposes.
Bruinsma Sean, Boniface Claude
doaj   +1 more source

Global Circulation of Martian Ionospheric Currents Revealed by Magnetometer Data

AGU Advances, Volume 7, Issue 6, September 2026.
Abstract In the dynamo region of the Martian ionosphere, a large‐scale current is generated by charge separation: ions collide with neutrals while electrons preferentially gyrate around local magnetic field lines. Using MAVEN magnetometer data and a physics‐informed neural network constrained by Ampère's law and Gauss's law for magnetism (the Neural ...
T. Delcourt, A. Mittelholz
wiley   +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

First tristatic studies of meso-scale ion-neutral dynamics and energetics in the high-latitude upper atmosphere using collocated fpis and EISCAT radar [PDF]

, 2004
A unique experiment was undertaken during the nights of 27 and 28 February 2003. Tristatic Fabry-Perot Interferometer (FPI) measurements of the upper thermosphere were co-located with tristatic EISCAT radar measurements of the ionosphere.
Aylward, A. D., McWhirter, I., Kosch, M.J., Ford, E.A.K., Aruliah, A.L., Ford, E. A. K., Griffin, E.M., Aruliah, A. L., Howells, V.S.C., Aylward, A.D., Charalambous, A., Howells, V. S. C., Kosch, M. J., Davis, C.J., Griffin, E. M., Davis, C. J.   +15 more
core  

Machine‐Learned HASDM Thermospheric Mass Density Model With Uncertainty Quantification

Space Weather, 2022
A thermospheric neutral mass density model with robust and reliable uncertainty estimates is developed based on the Space Environment Technologies (SET) High Accuracy Satellite Drag Model (HASDM) density database.
Richard J. Licata, Piyush M. Mehta, W. Kent Tobiska, S. Huzurbazar   +3 more
doaj   +1 more source

Chemistry of the thermosphere and ionosphere [PDF]

Journal of Atmospheric and Terrestrial Physics, 1979
The ionosphere offers an excellent laboratory for the study of atomic and molecular processes. Densities are low, permitting highly reactive species to accumulate in measurable quantities. Temporal and spatial scales are large, and the solar energy source causes substantial departures from thermodynamic equilibrium.
Torr, D. G., Torr, Marsha R.
openaire   +2 more sources

Quasi 6‐Day Wave Variability in the Thermosphere and Ionosphere: Observations and Modeling

Earth and Space Science, Volume 13, Issue 9, September 2026.
Abstract Satellite observations of the upper mesosphere and lower thermosphere from TIMED‐SABER and ICON‐MIGHTI reveal a clear Quasi 6‐Day Wave (Q6DW) event in the winds and temperatures in this region. This Q6DW event persists across multiple data sets throughout the middle‐to‐upper thermosphere and the F‐region ionosphere, including GOLD disk ...
Oluwafisayo P. Owolabi, Scott L. England, Yen‐Jung Wu   +2 more
wiley   +1 more source

On the importance of middle-atmosphere observations on ionospheric dynamics using WACCM-X and SAMI3 [PDF]

Annales Geophysicae
Recent advances in atmospheric observations and modeling have enabled the investigation of thermosphere–ionosphere interactions as a whole-atmosphere problem.
F. Sassi, F. Sassi, A. G. Burrell, S. E. McDonald, J. L. Tate, J. P. McCormack, J. P. McCormack   +6 more
doaj   +1 more source

Statistical Characterization of GITM Thermospheric Horizontal Winds in Comparison to GOCE Estimations

Space Weather, 2022
Characterization of the thermospheric horizontal wind is an important challenge in atmospheric modeling due to its vital role in the transport of densities and energy, associations with the diurnal tide, and interplay with vertical winds that drive ...
Daniel A. Brandt, Aaron J. Ridley
doaj   +1 more source