日本地球惑星科学連合2018年大会

講演情報

[EE] Evening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-PS01] Outer Solar System Exploration Today, and Tomorrow

2018年5月21日(月) 17:15 〜 18:30 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:木村 淳(大阪大学)、笠羽 康正(東北大学大学院 理学研究科 地球物理学専攻)、Vance Steven(Jet Propulsion Laboratory, Caltech、共同)、Kunio M. Sayanagi (Hampton University)

[PPS01-P07] Small Next-generation Atmospheric Probe (SNAP) 小型大気突入プローブによる天王星・海王星の将来探査構想

*Sayanagi Kunio1Dillman Robert2Atkinson David3Li Jing8Saikia Sarag4Simon Amy5Spilker Thomas6Wong Michael7Hope Drew2Arora Archit4Bowen Steven2Bowes Angela2Goggin David2Steven Horan2Infeld Samantha2Lecky John2Marvel Timothy2McCabe Ryan2Parikh Anish2Peterson David2Primeaux Stephanie2Scammell Alexander2Somervill Kevin2Taylor Lawrence2Thames Christopher2Tosoc Hernani2Tran Loc2 (1.Hampton University、2.NASA Langley Research Center、3.Jet Propulsion Laboratory, California Institute of Technology、4.Purdue University、5.NASA Goddard Space Flight Center、6.Planetary Mission Architect、7.University of California, Berkeley、8.NASA Ames Resaerch Center)

キーワード:天王星、海王星、大気、惑星探査

We present a concept for a small, atmospheric probe that could be flexibly added to future missions that orbit or fly-by a giant planet as a secondary payload, which we call the Small Next-generation Atmospheric Probe (SNAP). SNAP’s main scientific objectives are to determine the vertical distribution of clouds and cloud-forming chemical species, thermal stratification, and wind speed as a function of depth. As a case study, we present the advantages, cost and risk of adding SNAP to the future Uranus Orbiter and Probe flagship mission; in combination with the mission’s main probe, SNAP would perform atmospheric in-situ measurements at a second location, and thus enable and enhance the scientific objectives recommended by the 2013 Planetary Science Decadal Survey and the 2014 NASA Science Plan to determine atmospheric spatial variabilities.

We envision that the science objectives can be achieved with a 30-kg entry probe ~0.5m in diameter (less than half the size of the Galileo probe) that reaches 5-bar pressure-altitude and returns data to Earth via the carrier spacecraft. As the baseline instruments, the probe will carry an Atmospheric Structure Instrument (ASI) that measures the temperature, pressure and acceleration, a carbon nanotube-based NanoChem atmospheric composition sensor, and an Ultra-Stable Oscillator (USO) to conduct a Doppler Wind Experiment (DWE). We also catalog promising technologies currently under development that will strengthen small atmospheric entry probe missions in the future. While SNAP is applicable to multiple planets, we examine the feasibility, benefits and impacts of adding SNAP to the Uranus Orbiter and Probe flagship mission.