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| Titel |
The Temporal Evolution of O(1D) Emission in Ionospheric Modification Experiments |
| VerfasserIn |
K. S. Kalogerakis, E. B. Byler |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250022375
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| Zusammenfassung |
| Understanding processes involving atomic oxygen is crucial for the study of energy transfer
and transport dynamics in the upper atmosphere. Until recently, the lack of reliable
information on the role of O(3P ) collisions in relaxing O(1D) has often led to the assumption
that the ionospheric atomic oxygen red line emission decay was controlled by collisions
with N2. Laboratory measurements at SRI International have established that the
removal rate constants for O(1D) + N2 and O(1D) + O are comparable and therefore
O atoms play a major role in the ionospheric O(1D) decay at altitudes between
200 and 300 km. We have previously shown that measuring the O(1D) emission
decay following ionospheric modification provides an approach for Remote O-atom
Sensing by Ionospheric Excitation (ROSIE). In this report, we present examples of
available ionospheric modification data sets from several heating facilities, examine the
details of the appearance and decay of the O(1D) emission, and interpret its temporal
evolution.
This work is supported by the CEDAR Program of the U.S. National Science Foundation
(NSF) under grant no. ATM-0737713. The participation of Eleanor B. Byler was made
possible by the NSF Research Experiences for Undergraduates Program under grant no.
PHY-0649315. |
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