Japan Geoscience Union Meeting 2015

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International Session (Oral)

Symbol P (Space and Planetary Sciences) » P-PS Planetary Sciences

[P-PS05] Mars

Wed. May 27, 2015 2:15 PM - 3:00 PM 106 (1F)

Convener:*Takehiko Satoh(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Masaki Ishiwatari(Department of Cosmosciences, Graduate school of Science, Hokkaido University), Sho Sasaki(Department of Earth and Space Sciences, School of Science, Osaka University), Yoshiyuki O. Takahashi(Graduate School of Science, Kobe University), Ayako Matsuoka(Research Division for Space Plasma, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Hideaki Miyamoto(The University Museum, The University of Tokyo), Chair:Hideaki Miyamoto(The University Museum, The University of Tokyo)

2:15 PM - 2:30 PM

[PPS05-01] Examination of Mission Strategy and Spacecraft System to Study Martian Atmospheric Escape

*Ayako MATSUOKA1, Kanako SEKI2, Naoki TERADA3, Shoichiro YOKOTA1, Atsushi YAMAZAKI1, Takumi ABE1, Takeshi IMAMURA1, Yasuhiro KAWAKATSU1, Yoshifumi FUTAANA4, Masafumi HIRAHARA2, Keigo ISHISAKA5, Atsushi KUMAMOTO3, Junichi KURIHARA6, Hiromu NAKAGAWA3, Takeshi SAKANOI7, Makoto TAGUCHI8, Kazunori OGOHARA9 (1.ISAS/JAXA, 2.STEL, Nagoya Univ., 3.Dept. Geophys., Grad. Sch. Sci., Tohoku Univ., 4.IRF, Sweden, 5.Toyama Pref. Univ., 6.Cosmosciences, Hokkaido Univ., 7.Planet. Plasma Atmos. Res. Cent., Tohoku Univ., 8.College of Science, Rikkyo Univ., 9.School of Engineering, The Univ. of Shiga Prefecture)

Keywords:Mars, Planetary atmosphere, Solar wind, Planetary Magnetic Field, Plasma

The atmospheric escape from Mars is considered to be closely associated with the evolution of the Martian atmosphere as well as the existence of the water on Mars. We are now investigating a project to study the global feature and the physical process of the atmospheric escape from Mars. It is expected to consist of two orbiters; the mother satellite is aimed to make in-situ observation of plasma and thin atmosphere at about 150 km altitude, and atmospheric imaging at the apo-apsis of 3RM altitude. The daughter satellite is the solar-wind monitor. We are planning to make simultaneous observation of the atmospheric escape by the interaction with the solar wind by these two satellites. Now we are examining the quantitative measurement targets to fully understand the Martian atmospheric escape. At the same time, the sorts and performance of scientific instruments on these orbiters are examined. And furthermore, the preliminary spacecraft design, orbit design and mission plan to achieve the scientific goal are investigated.