[P-CG21] 宇宙・惑星探査の将来計画と関連する機器開発の展望

[PCG21-02] 超小型衛星へＤＣラングミューアプローブ搭載不可について

*小山 孝一郎¹、方 恵寛¹ (1.国立成功プラズマ宇宙科学研究所 　台湾)

キーワード：小型衛星、電離圏、新たな測定器

Tiny satellite such a scubsat is expexted to be useful for scientific purpose, especially if the mision is organized as constellation. One field is ionosphere research. Dc Langmuir probe has been used since 1945 to measure two basic parameters (Te and Ne). The measurement with DC probe works only when conductive surface of reference electrode (satellite surface) is large enough compared with the surface area of the electrode. However this requirement is not fullfilled for tiny satellite. Accordingly this leades to serious problem by two reason: (1) potential of the satellite changes as the voltage of DC Langmuir probe is swept, and (2) contamination of both satellite and electrode can't provide us relialbe measurent values.
The paper discusses problems discribed above and propose two possible solutions.