Validation of electron density and temperature observed by DEMETER

Sie sind hier: Homepage > Suche

Validation of electron density and temperature observed by DEMETER

Kakinami, Yoshihiro / Kamogawa, Masashi / Onishi, Tatsuo / Mochizuki, Kaori / Lebreton, Jean-Pierre / Watanabe, Shigeto / Yamamoto, Masa-Yuki / Mogi, Toru

Abstract

Abstract Measuring electron density (Ne) and temperature (Te) using a DC Langmuir probe in the ionosphere is very often degraded by the electrode contamination. In order to examine the accuracy of DEMETER observations, we compared DEMETER Ne and Te with several other satellites observations and IRI2012 as reference data. DEMETER Ne and Te show well-known dependencies on the solar irradiance except for the range of F10.7>100. However, DEMETER Ne are about 70% lower than those of IRI in day time data and its solar irradiance dependency is consistent with the reference data in night time data. It was confirmed that the negative slope appears in deep solar minimum solar cycle 23/24. DEMETER Te are higher than IRI data by 500–1500K in day time and by 800K in night time. The relation between Ne and Te is well defined by a negative slope both in DEMETER and IRI during day time, while such a similarity is not recognized in night time data. DEMETER Te is 700K higher than IRI Te for the same value of Ne. When Ne is less than 10⁴ cm⁻³ in night time, significant reductions in DEMETER Te are observed, which is close to expected values. Such discrepancies from the reference data and some peculiar behaviors of DEMETER Te and Ne data necessitate a careful attention in using them in consideration of their data alterations. However, their relative variations and averaged behavior in time contain useful information for scientific studies such as dependencies on solar irradiance and wave-4 longitudinal structure under certain conditions (Ne>10⁴ cm⁻³ and F10.7<100).

Zugriff

Zugriff prüfen

Verfügbarkeit in meiner Bibliothek prüfen

Bestellung bei Subito €

Exportieren, teilen und zitieren

Dokumentinformationen

Titel :

Validation of electron density and temperature observed by DEMETER

Beteiligte:

Kakinami, Yoshihiro (Autor:in) / Kamogawa, Masashi (Autor:in) / Onishi, Tatsuo (Autor:in) / Mochizuki, Kaori (Autor:in) / Lebreton, Jean-Pierre (Autor:in) / Watanabe, Shigeto (Autor:in) / Yamamoto, Masa-Yuki (Autor:in) / Mogi, Toru (Autor:in)

Erschienen in:

Advances in Space Research ; 52 , 7 ; 1267-1273

Erscheinungsdatum :

2013-07-06

Format / Umfang :

7 pages

ISSN :

0273-1177

DOI :

https://doi.org/10.1016/j.asr.2013.07.003

Medientyp :

Aufsatz (Zeitschrift)