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| Titel |
Multi-instrument comparisons of D-region plasma measurements |
| VerfasserIn |
M. Friedrich, K. M. Torkar, U.-P. Hoppe, T.-A. Bekkeng, A. Barjatya, M. Rapp |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 31, no. 1 ; Nr. 31, no. 1 (2013-01-29), S.135-144 |
| Datensatznummer |
250017743
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| Publikation (Nr.) |
 copernicus.org/angeo-31-135-2013.pdf |
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| Zusammenfassung |
| The ECOMA (Existence and Charge state Of Meteoric dust grains in the middle Atmosphere) series of sounding rocket flights consisted of nine flights with
almost identical payload design and flight characteristics. All flights
carried a radio wave propagation experiment together with a variety of
plasma probes. Three of these measured electron densities, two ion
densities. The rockets were all launched from the Andøya Rocket Range,
Norway, in four campaigns between 2006 and 2010. Emphasis is on the final
three flights from 2010 where the payloads were equipped with four
instruments capable of measuring plasma densities in situ, among them a novel probe
flown for the first time in conjunction with a wave propagation experiment.
Deviation factors of all probe data relative to the wave propagation results
were derived and revealed that none of the probe data were close to the wave
propagation results at all heights, but – more importantly – the instruments
showed very different behaviour at different altitudes. The novel
multi-needle Langmuir probe exhibits the best correlation to the wave
propagation data, as there is minimal influence of the payload potential,
but it is still subject to aerodynamics, especially at its location at the
rear of the payload. For all other probe types, the deviation factor comes
closer to unity with increasing plasma density. No systematic difference of
the empirical deviation factor between day and night can be found. The large
negative payload potential in the last three flights may be the cause for
discrepancies between electron and ion probe data below 85 km. |
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