[P-PS02_28AM1] Mars

[PPS02-04] Examination of Mission Scenario and Spacecraft System to Study Martian Atmospheric Escape

*Ayako MATSUOKA¹, Kanako SEKI², Naoki TERADA³, Shoichiro YOKOTA¹, Atsushi YAMAZAKI¹, Yasuhiro KAWAKATSU¹, Takumi ABE¹, Yoshifumi FUTAANA⁴, Masafumi HIRAHARA², Takeshi IMAMURA¹, Keigo ISHISAKA⁵, Atsushi KUMAMOTO³, Junichi KURIHARA⁶, Hiromu NAKAGAWA³, Satoshi OGURA¹, Takeshi SAKANOI⁷, Makoto TAGUCHI⁸, Satoshi YAGITANI⁹ (1.ISAS/JAXA, 2.STEL, Nagoya Univ., 3.Dept. Geophys., Grad. Sch. Sci., Tohoku Univ., 4.IRF, Sweden, 5.Toyama Pref. Univ., 6.Planet. Plasma Atmos. Res. Cent., Tohoku Univ., 7.Cosmosciences, Hokkaido Univ., 8.Rikkyo Univ., 9.Kanazawa Univ.)

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 at least two orbiters; one of the orbiters is aimed to make in-situ observation of plasma and thin atmosphere at about 100 km altitude, and the other is for the atmospheric imaging and solar-wind monitor. We are planning to make simultaneous observation of the atmospheric escape by the interaction with the solar wind by both of in-situ measurement orbiter and remote-sensing one. 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.