日本地球惑星科学連合2018年大会

講演情報

[EE] 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-PS02] Regolith Science

2018年5月22日(火) 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:和田 浩二(千葉工業大学惑星探査研究センター)、中村 昭子(神戸大学大学院理学研究科地球惑星科学専攻)、Patrick Michel(共同)、Kevin John Walsh (Southwest Research Institute Boulder)

[PPS02-P02] Bed depth detection from impact penetrometry

*Kevin John Walsh1Alex Harrison Parker1 (1.Southwest Research Institute Boulder)

キーワード:Penetrometry, Asteroids, Regolith

Many current spacecraft and landers, by their very nature, perform low-velocity penetrometry experiments on the surfaces of small bodies. Spacecraft instrumentation observe the spacecraft-asteroid interactions and will allow the determination of some surface properties of the asteroids by analyzing imaging and spectra - but also spacecraft telemetry. For future missions directed penetrometry experiments could provide critical information to the sample-site selection processes prior to the interaction with the surface by the main spacecraft.

Here we explore the dynamics of low-velocity penetrometry that allows for the determination of a regolith bed depth and discuss its applications to exploring the subsurface of an asteroid. Combined laboratory experiments, numerical modeling and common universal force laws provide a framework to interpret acceleration profiles of impactors hitting granular materials at low-velocities with minimal prior knowledge of the local material properties.