.png){kind=icon}
返回
Rapid Impactor Sample Return (RISR) mission scenario
.png){kind=icon}
PRE
AI
DOI：10.1016/j.ijimpeng.2003.10.023.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Due to the long lead time and great expense of traditional sample return mission plans to Mars and other astronomical bodies, there is a need for a new and innovative way to return samples more quickly and at a lower cost. The Rapid Impactor Sample Return (RISR) mission is one such proposal. The scenario involves a single pass of Mars, a Martian moon or an asteroid at high speeds (7 km/s), with the sample return vehicle skimming just 1 or 2 meters above a high point (such as a top ridge on Olympus Mons on Mars) and releasing an impactor. The impactor strikes the ground, throwing up debris. The debris with roughly the same forward velocity is captured by the sample return vehicle and returned to Earth. There is no delay or orbit in the vicinity of Mars or the asteroid: RISR is a one-pass mission. This paper discusses some of the details of the scenario. Calculations are presented that address the question of how much material can be recovered with this technique. There are concerns about the effect of Mars tenuous atmosphere; however, it will be noted that such issues do not occur for RISR style missions to Phobos, Deimos, or asteroids and Near-Earth Objects. Recent test results in the missile defense community (Integrated Flight Tests 6 - 8 in 2001, 2002) have scored direct hits at better than 1 meter accuracy with closing velocities of 7.6 km/s, suggesting that accuracy and sensing technologies are sufficiently developed that the RISR mission scenario is feasible. (C) 2003 Elsevier Ltd. All rights reserved.
Keyword:
sample return techniques
Mars sample return
asteroid sample return
hypervelocity impact
impactor sample return
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
