lunar exploration, X-ray spectroscopy, X-ray spectrometer, X-ray spectrum, solar altitude, KAGUYA, SELENE, SELenological and ENgineering Explorer, signal to noise ratio, solar radiation, lunar surface, lunar geology, solar activity
Japan Aerospace Exploration Agency Department of Planetary Science, Institute of Space and Astronautical Science
Japan Aerospace Exploration Agency Department of Planetary Science, Institute of Space and Astronautical Science
Japan Aerospace Exploration Agency Department of Planetary Science, Institute of Space and Astronautical Science
Japan Aerospace Exploration Agency Department of Planetary Science, Institute of Space and Astronautical Science
Japan Aerospace Exploration Agency Department of Planetary Science, Institute of Space and Astronautical Science
Japan Aerospace Exploration Agency Department of Planetary Science, Institute of Space and Astronautical Science
Japan Aerospace Exploration Agency Department of Planetary Science, Institute of Space and Astronautical Science
出版者
宇宙航空研究開発機構宇宙科学研究本部
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
雑誌名
第40回月・惑星シンポジウム
雑誌名(英)
Proceedings of the 40th ISAS Lunar and Planetary Symposium
ページ
181 - 184
発行年
2007-07-25
抄録（英）
We evaluated potentiality of lunar terminator observations by X-Ray Spectrometer (XRS) onboard SELENE (SELenological and Engineering Explorer: KAGUYA). We quantitatively estimated X-ray spectra at low solar altitudes by a numerical X-ray interaction model, and investigated critical measuring times which are required for analyses of the X-ray fluorescence lines from the target elements. The results show that effective observations at the terminator can be carried out within a double or triple measuring time as long as that at the sub solar point. Better signal-to-noise ratios at the terminator, furthermore, provide suitable situation to detect Ca and Fe, and possibly Cr and Mn.
Terminator observation by X-Ray Spectrometer onboard SELENE
