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Volume 58 Supplement 9

Special Issue: International Sessions of Japan Earth and Planetary Science Joint Meeting 2005

Electron temperature variation associated with the auroral energy input during the DELTA campaign

Earth, Planets and Space volume 58, pages 1139–1146 (2006)Cite this article

Abstract

Japanese sounding rocket “S-310-35” was launched from Andøya Rocket Range in Norway on December 13, 2004 during Dynamics and Energetics of the Lower Thermosphere in Aurora (DELTA) campaign, in which the rocket-borne in-situ measurements and ground-based measurements were coordinated to conduct a comprehensive observation of the upper atmospheric response against the auroral energy input. The Fast Langmuir Probe (FLP) was installed on the sounding rocket to study thermal structure and energy balance of the plasma by measuring the electron temperature in the polar lower ionosphere. The FLP observations indicate that the electron temperatures were found to be remarkably high in an altitude range from 106 km to 114 km during the ascending phase of the rocket. The lowest part of this high temperature region might be affected by artificial electron beam which was generated by the N2 temperature instrument on the same rocket. On the other hand, a small increase of the electron temperature was observed at the altitude from 114 to 119 km in the descending phase. This is possibly the first time that both the temperature increase and density fluctuation that may be caused by the Farley-Buneman instability were detected by in-situ observation.

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Authors and Affiliations

  1. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1, Yoshinodai, Sagamihara, Kanagawa, 229-8510, Japan

    Takumi Abe, Koh-Ichiro Oyama & Akihiro Kadohata

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  1. Takumi Abe
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  2. Koh-Ichiro Oyama
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  3. Akihiro Kadohata
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Correspondence to Takumi Abe.

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Abe, T., Oyama, KI. & Kadohata, A. Electron temperature variation associated with the auroral energy input during the DELTA campaign. Earth Planet Sp 58, 1139–1146 (2006). https://doi.org/10.1186/BF03352003

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  • DOI: https://doi.org/10.1186/BF03352003

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