Results 21 to 30 of about 1,392 (166)

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

Calibration of GRACE on-board accelerometers for thermosphere density derivation [PDF]

Geo-spatial Information Science, 2022
Low Earth Orbit satellite on-board accelerometers play an important role in improving our understanding of thermosphere density; however, the accelerometer-derived densities are subject to accelerometer calibration errors. In this study, two different dynamic calibration schemes, the accelerometer parameter-incorporated orbit fitting and precise orbit ...
Min Li, Zhuo Lei, Wenwen Li, Kecai Jiang, Youcun Wang, Qile Zhao   +5 more
openaire   +2 more sources

A new method for studying the thermospheric density variability derived from CHAMP/STAR accelerometer data for magnetically active conditions [PDF]

Annales Geophysicae, 2007
Thermospheric densities deduced from STAR accelerometer measurements onboard the CHAMP satellite are used to characterize the thermosphere and its response to space weather events. The STAR thermospheric density estimates are analysed using a Singular
M. Menvielle, M. Menvielle, C. Lathuillère, S. Bruinsma, R. Viereck   +4 more
doaj   +1 more source

Thermospheric Neutral Density Variation During the “SpaceX” Storm: Implications From Physics‐Based Whole Geospace Modeling

Space Weather, 2022
The Starlink satellites launched on 3 February 2022 were lost before they fully arrived in their designated orbits. The loss was attributed to two moderate geomagnetic storms that occurred consecutively on 3–4 February.
Dong Lin, Wenbin Wang, Katherine Garcia‐Sage, Jia Yue, Viacheslav Merkin, Joseph M. McInerney, Kevin Pham, Kareem Sorathia   +7 more
doaj   +1 more source

Thermospheric and ionospheric structure

, 2020
Thermospheric and ionospheric density during the 2018 global dust ...
niu, D
core   +3 more sources

Density‐Temperature Synchrony in the Hydrostatic Thermosphere [PDF]

Journal of Geophysical Research: Space Physics, 2019
AbstractThe paper presents a detailed analysis of the density‐temperature (ρ‐T) synchrony in the thermosphere using a hydrostatic general circulation model. The numerical models in general offer not only great potential for forecasting the transient response of the thermosphere but also are excellent tools for understanding the driving mechanisms of ...
Timothy Kodikara, Brett Carter, Robert Norman, Kefei Zhang   +3 more
openaire   +1 more source

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., E. Sutton, C. La Hoz, H. Vickers, Ogawa, Y., Y. Ogawa, Vickers, Hannah, Kosch, M. J., M. J. Kosch, Vickers, H., La Hoz, Cesar   +11 more
core   +1 more source

TND-IGG RL01: Thermospheric neutral density from accelerometer measurements of GRACE, CHAMP and Swarm

, 2021
TND-IGG RL01: This dataset is the first release of thermospheric neutral densities (TND) processed at the Institute of Geodesy and Geoinformation (IGG), University of Bonn, Germany. TNDs are derived from accelerometer measurements of the satellites GRACE-
Forootan, Ehsan, Corbin, Armin, Löcher, Anno, Vielberg, Kristin, Lück, Christina, Kusche, Jürgen   +5 more
core   +1 more source

A New Method for Deriving the Nightside Thermospheric Density Based on GUVI Dayside Limb Observations

Space Weather, 2020
We propose a new method to derive the nightside thermospheric density by extending Global Ultraviolet Imager (GUVI) dayside limb observations using empirical orthogonal function (EOF) analysis. First, we acquire the GUVI dayside total mass density during
Tingting Yu, Zhipeng Ren, You Yu, Weixing Wan   +3 more
doaj   +1 more source

Time-dependent responses of the neutral mass density to fixed magnetospheric energy inputs into the cusp region in the thermosphere during a period of large IMF B Y: a high-resolution two-dimensional local modeling

Earth, Planets and Space, 2021
Thermospheric mass density values around the 400-km altitude in the cusp can be significantly enhanced as compared to regions around the cusp. To gain insights into the extent to which the magnitude of the cusp mass density enhancements can be explained ...
Tomokazu Oigawa, Hiroyuki Shinagawa, Satoshi Taguchi   +2 more
doaj   +1 more source