Japan Geoscience Union Meeting 2018

Presentation information

[EJ] Evening Poster

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

[P-PS07] Mars and Mars system: results from a broad spectrum of Mars studies and aspects for future missions

Sun. May 20, 2018 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

convener:Hideaki Miyamoto(University of Tokyo), Tomohiro Usui(Earth-Life Science Institute, Tokyo Institute of Technology), Ayako Matsuoka(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 Yang1, Jianguo Yan1, Weitong Jin1, Mao Ye1 (1.State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, China)

Keywords: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.