日本地球惑星科学連合2018年大会

講演情報

[EJ] ポスター発表

セッション記号 P (宇宙惑星科学) » P-PS 惑星科学

[P-PS07] 火星と火星圏の科学

2018年5月20日(日) 15:30 〜 17:00 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:宮本 英昭(東京大学)、臼井 寛裕(東京工業大学地球生命研究所)、松岡 彩子(宇宙航空研究開発機構 宇宙科学研究所 太陽系科学研究系、共同)、Sushil K Atreya (University of Michigan Ann Arbor)

[PPS07-P08] A simulation for Phobos gravity field recovery from a quasi-satellite orbit

*Xuan Yang1Jianguo Yan1Weitong Jin1Mao Ye1 (1.State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, China)

キーワード:Phobos, Quasi-satellite orbit, Gravity field recovery

Owing to the gravitational acceleration of Phobos is far less than Mars, the satellite cannot orbit Phobos. Currently the information of Phobos gravity field are mainly retrieved from several Mars Express flybys. The Mars missions in plan, like Martian moons exploration mission (MMX) from JAXA and DePhine proposed by ESA, will apply a quasi-satellite orbit on Phobos, which is supposed to make a great contribution to gravity field recovery. In this work, a quasi-satellite orbit is designed for Phobos gravity field recovery. This orbit has nearly a comprehensive global mapping on Phobos surface and do not need frequent track maneuvering. The simulation shows that a ten-degree gravity field model could be recovered and the model accuracy is assessed by power spectrum analysis. With such a quasi-satellite orbit, the Phobos gravity field will gain significant improvement.