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Interhemispheric Asymmetry in the High‐Latitude Neutral Density Variations During the 13–14 March 2022 Storm [PDF]

Space Weather
During the second recovery phase of the 13–14 March 2022 storm, intense high‐latitude neutral mass density spikes are detected by satellites at ∼500 km in both hemispheres.
Qingyu Zhu, Gang Lu, Sarah Vines, Marc Hairston   +3 more
doaj   +2 more sources

Importance of lower atmospheric forcing and magnetosphere-ionosphere coupling in simulating neutral density during the February 2016 geomagnetic storm

Frontiers in Astronomy and Space Sciences, 2022
During geomagnetic storms a large amount of energy is transferred into the ionosphere-thermosphere (IT) system, leading to local and global changes in e.g., the dynamics, composition, and neutral density.
Astrid Maute, Gang Lu, Delores J. Knipp, Delores J. Knipp, Brian J. Anderson, Sarah K. Vines   +5 more
doaj   +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

Storm time neutral density assimilation in the thermosphere ionosphere with TIDA

Journal of Space Weather and Space Climate, 2022
To improve Thermosphere–Ionosphere modeling during disturbed conditions, data assimilation schemes that can account for the large and fast-moving gradients moving through the modeled domain are necessary.
Codrescu Mihail V., Codrescu Stefan M., Fedrizzi Mariangel   +2 more
doaj   +1 more source

Uncertainty quantification of the DTM2020 thermosphere model

Journal of Space Weather and Space Climate, 2021
Aims: The semi-empirical Drag Temperature Models (DTM) calculate the Earth’s upper atmosphere’s temperature, density, and composition. They were applied mainly for spacecraft orbit computation.
Boniface Claude, Bruinsma Sean
doaj   +1 more source

Comparative Accuracies of Models for Drag Prediction During Geomagnetically Disturbed Periods: A First Principles Model Versus Empirical Models

Space Weather, 2023
We examine the accuracy of density prediction by the first principles model Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM) developed by the National Center for Atmospheric Research and compare it to the accuracy of three ...
R. L. Walterscheid, M. W. Chen, C.‐C. Chao, S. Gegenheimer, J. Cabrera‐Guzman, J. McVey   +5 more
doaj   +1 more source

A Novel Method to Derive Exospheric Temperatures from Swarm Thermospheric Densities during Quiet Times

Remote Sensing, 2022
One of the most important parameters in the atmosphere, the neutral temperature, becomes difficult to measure at high altitudes such as the exosphere. Therefore, based on the assumption of static equilibrium and isothermal atmosphere, a new method was ...
Yingyun Lin, Jiyao Xu, Jose van den IJssel, Wei Yuan   +3 more
doaj   +1 more source

Improving the estimation of thermospheric neutral density via two-step assimilation of in situ neutral density into a numerical model

Earth, Planets and Space, 2022
Neutral thermospheric density is an essential quantity required for precise orbit determination of satellites, collision avoidance of satellites, re-entry prediction of satellites or space debris, and satellite lifetime assessments.
Armin Corbin, Jürgen Kusche
doaj   +1 more source

Approximating Isoneutral Ocean Transport via the Temporal Residual Mean

Fluids, 2019
Ocean volume and tracer transports are commonly computed on density surfaces because doing so approximates the semi-Lagrangian mean advective transport. The resulting density-averaged transport can be related approximately to Eulerian-averaged quantities
Andrew L. Stewart
doaj   +1 more source

Comparison of a Neutral Density Model With the SET HASDM Density Database

Space Weather, 2021
The EXospheric TEMperatures on a PoLyhedrAl gRid (EXTEMPLAR) method predicts the neutral densities in the thermosphere. The performance of this model has been evaluated through a comparison with the Air Force High Accuracy Satellite Drag Model (HASDM ...
Daniel R. Weimer, W. Kent Tobiska, Piyush M. Mehta, R. J. Licata, Douglas P. Drob, Jean Yoshii   +5 more
doaj   +1 more source