Results 11 to 20 of about 2,463,978 (199)

Latitudinal Discrepancy Between Thermospheric Density and Temperature Associated With Neutral Composition Effect

Geophysical Research Letters
In this study, multi‐source thermospheric observations and TIEGCM simulations were used to explore the latitudinal variations of thermospheric temperature and total mass density at equinoxes.
Zhongli Li, Xiaoli Luan, Jiuhou Lei, Dexin Ren   +3 more
doaj   +2 more sources

Sources of the High-Latitude Thermospheric Neutral Mass Density Variations [PDF]

Journal of Astronomy and Space Sciences, 2010
We investigate the sources of the variation of the high-latitude thermospheric neutral mass density depending on the interplanetary magnetic field (IMF) conditions.
Young-Sil Kwak, Arthur Richmond, Yue Deng, Byung-Ho Ahn, Kyung-Suk Cho   +4 more
doaj   +2 more sources

Inversion of Global Thermospheric Density Map Based on Satellite Measurements Using Deep Learning RFR Network

Earth and Space Science
The estimation error of neutral mass density is a major source of uncertainty in calculating thermospheric drag, which is the primary non‐gravitational perturbation affecting satellites in low Earth orbit.
Kun Zhang, Fengsi Wei, Yanshi Huang, Pingbing Zuo, Mengfei Sun, Shijin Wang, Hao Yang, Jinlong Ji, Huan Shi, Liping Lv, Zehao Chen   +10 more
doaj   +2 more sources

Thermospheric atomic oxygen density estimates using the EISCAT Svalbard Radar [PDF]

, 2013
[1] Coupling between the ionized and neutral atmosphere through particle collisions allows an indirect study of the neutral atmosphere through measurements of ionospheric plasma parameters. We estimate the neutral density of the upper thermosphere above ~
Sutton, E., La Hoz, C., Ogawa, Y., Kosch, M. J., Vickers, H.   +4 more
core   +5 more sources

Spatial sampling of the thermospheric vertical wind field at auroral latitudes [PDF]

, 2011
Results are presented from two nights of bistatic Doppler measurements of neutral thermospheric winds using Fabry!Perot spectrometers at Mawson and Davis stations in Antarctica.
Davies, Theo, Conde, Mark, Kosch, Michael, Dyson, Peter, Anderson, Callum   +4 more
core   +5 more sources

Mesoscale observations of Joule heating near an auroral arc and ion-neutral collision frequency in the polar cap E region [PDF]

, 2011
We report on the first mesoscale combined ionospheric and thermospheric observations, partly in the vicinity of an auroral arc, from Svalbard in the polar cap on 2 February 2010. The EISCAT Svalbard radar employed a novel scanning mode in order to obtain
Wild, J.A., Yiu, I., Kosch, M.J., Anderson, C., Ogawa, Y., Aruliah, A., Tsuda, T., Nozawa, S., Howells, V., Baddeley, L.J., McCrea, I.W.   +10 more
core   +6 more sources

Case study of the mesospheric and lower thermospheric effects of solar x-ray flares: Coupled ion-neutral modelling and comparison with EISCAT and riometer measurements [PDF]

, 2008
Two case studies of upper mesospheric and lower thermospheric (UMLT) high-latitude effects of solar X-ray flares are presented. Sodankylä Ion-neutral Chemistry Model (SIC) electron density profiles agree with D-region EISCAT and riometer ...
Beharrell, M.J., A. Seppälä, Verronen, P.T., Seppälä, A., Ulich, T., C.-F. Enell, Enell, C.-F., Honary, F., P. T. Verronen, J. P. Vierinen, T. Ulich, A. Kero, E. Turunen, M. J. Beharrell, Vierinen, J.P., Turunen, E., F. Honary, Kero, A.   +17 more
core   +5 more sources

Tidal signatures of the thermospheric mass density and zonal wind at midlatitude: CHAMP and GRACE observations [PDF]

Annales Geophysicae, 2015
By using the accelerometer measurements from CHAMP and GRACE satellites, the tidal signatures of the thermospheric mass density and zonal wind at midlatitudes have been analyzed in this study.
C. Xiong, C. Xiong, Y.-L. Zhou, H. Lühr, H. Lühr, S.-Y. Ma   +5 more
doaj   +1 more source

Two‐Line Elements Based Thermospheric Mass Density Specification From Parameter Optimization of a Physics‐Based Model

Space Weather, 2023
Accurately estimating the mass density of the thermosphere can assist satellite operators in planning missions and optimizing satellite orbits, reducing the risk of collisions.
Dexin Ren, Jiuhou Lei
doaj   +1 more source

Evaluation of Physics‐Based Data Assimilation System Driven by Neutral Density Data From a Single Satellite

Space Weather, 2020
Accurate forecast of the thermospheric density is critical to the space community. The data assimilation approach that is based on the self‐consistent upper‐atmosphere model may provide better predictive capability of the coupled thermosphere system.
Dexin Ren, Jiuhou Lei
doaj   +1 more source