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arXiv 1107.4229astro-ph.EPphysics.space-ph
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减缓近地小行星撞击示范飞行任务的测量要求

Measurement requirements for a near-Earth asteroid impact mitigation demonstration mission

Stephen D. Wolters, Andrew J. Ball, Nigel Wells, Christopher Saunders, Neil McBride

摘要:

一个名为“堂吉诃德”的减缓撞击准备任务的概念是向近地小行星发射两个航天器:一个轨道器和一个撞击器。撞击器与小行星碰撞,而轨道器则通过撞击前后进行的无线电科学实验(RSE)测量小行星轨道的变化。为欧洲航天局开展了三项关于堂吉诃德的A阶段平行研究:这里介绍的研究反映了QinetiQ的研究成果。我们讨论了任务目标的有效载荷仪器的优先级,重点是解释的影响。介绍了无线电科学实验,并研究了太阳辐射压力如何可能增加测量目标小行星轨道的不确定性。它被确定为测量轨道的变化准确的热红外光谱仪是强制性的,以测量雅科夫斯基效应。激光高度计的优点进行了讨论。一个专用的广角影响相机的优点进行了讨论,并通过一个简单的模型的影响,最初的视野大小。

英文摘要:

A concept for an Impact Mitigation Preparation Mission, called Don Quijote, is to send two spacecraft to a Near-Earth Asteroid (NEA): an Orbiter and an Impactor. The Impactor collides with the asteroid while the Orbiter measures the resulting change in the asteroid's orbit, by means of a Radio Science Experiment (RSE) carried out before and after impact. Three parallel Phase A studies on Don Quijote were carried out for the European Space Agency: the research presented here reflects outcomes of the study by QinetiQ. We discuss the mission objectives with regards to the prioritisation of payload instruments, with emphasis on the interpretation of the impact. The Radio Science Experiment is described and it is examined how solar radiation pressure may increase the uncertainty in measuring the orbit of the target asteroid. It is determined that to measure the change in orbit accurately a thermal IR spectrometer is mandatory, to measure the Yarkovsky effect. The advantages of having a laser altimeter are discussed. The advantages of a dedicated wide-angle impact camera are discussed and the field-of-view is initially sized through a simple model of the impact.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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