Mathematics – Logic
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh22a..01r&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SH22A-01
Mathematics
Logic
0355 Thermosphere: Composition And Chemistry, 0358 Thermosphere: Energy Deposition (3369), 2431 Ionosphere/Magnetosphere Interactions (2736), 3369 Thermospheric Dynamics (0358), 7549 Ultraviolet Emissions
Scientific paper
The thermosphere, at altitudes of approximately 90-500 km, affects human technological systems through the drag it exerts on low-Earth-orbit spacecraft and debris, and through its influence on the embedded ionosphere, affecting radio-wave transmissions, and, consequently, communications and geolocation. We have formed a team under the NASA Living With a Star Targeted Research and Technology program to carry out an integrated research program on the focused science topic of thermospheric density and composition. Our goal is to improve scientific understanding of the thermosphere-ionosphere system, leading to improved first-principles models that accurately specify the variations of thermospheric density and composition with latitude, longitude, local time, solar flux, season, magnetic activity level, and orientation of the interplanetary magnetic field. We are developing improved quantitative models of solar and magnetospheric inputs to the thermosphere and improved physical parameterizations in the first-principles global models; we are analyzing thermospheric responses to solar and magnetospheric inputs on time scales from minutes to the length of the solar cycle; and we are developing an improved empirical model of thermospheric winds. These research products will be made available to the scientific community. This work is helping to clarify critical problem areas in thermospheric physics for planned NASA missions like the Ionosphere-Thermosphere Storm Probes, Geospace Electrodynamics Connections, and the Global-scale Observation of the Limb and Disk.
Akmaev Rashid
Anderson Philip C.
Crowley Geoff
Drob Douglas P.
Lummerzheim Dirk
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