The National Aeronautics and Space Administration (NASA) is progressing toward long-term lunar habitation. Critical to the design of a lunar habitat is an understanding of the lunar surface environment; of specific importance is the primary meteoroid and subsequent ejecta environment. The document, NASA SP-8013, was developed for the Apollo program and is the latest definition of the ejecta environment. There is concern that NASA SP-8013 may over-estimate the lunar ejecta environment. NASA's Meteoroid Environment Office (MEO) has initiated several tasks to improve the accuracy of our understanding of the lunar surface ejecta environment. This paper reports the results of experiments on projectile impact into powered pumice and unconsolidated JSC-1A Lunar Mare Regolith stimulant (JSC-1A) targets. The Ames Vertical Gun Range (AVGR) was used to accelerate projectiles to velocities in excess of 5 km/s and impact the targets at normal incidence. The ejected particles were detected by thin aluminum foil targets placed around the impact site and angular distributions were determined for ejecta. Comparison of ejecta angular distribution with previous works will be presented. A simplistic technique to characterize the ejected particles was formulated and improvements to this technique will be discussed for implementation in future tests.


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    Titel :

    Comparison of Ejecta Distributions from Normal Incident Hypervelocity Impact on Lunar Regolith Simulant


    Beteiligte:
    Edwards, David L. (Autor:in) / Cooke, William (Autor:in) / Scruggs, Rob (Autor:in) / Moser, Danielle E. (Autor:in)

    Kongress:

    46th AIAA Aerospace Sciences Meeting and Exhibit ; 2008 ; Reno, NV


    Erscheinungsdatum :

    2008-01-07


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Comparison of Primary Ejecta Distributions from Normal Incident Hypervelocity Impact on Lunar Regolith Simulant

    Edwards, D. / Cooke, W. / Suggs, R. et al. | British Library Conference Proceedings | 2008



    Analysis of Regolith Simulant Ejecta Distributions from Normal Incident Hypervelocity Impact

    Edwards, David L. / Cooke, William / Suggs, Rob et al. | NTRS | 2008


    Analysis of Regolith Simulant Ejecta Distributions from Normal Incident Hypervelocity Impact

    Edwards, D.L. / Cooke, W. / Suggs, R. et al. | British Library Conference Proceedings | 2009


    Measurement of Primary Ejecta From Normal Incident Hypervelocity Impact on Lunar Regolith Simulant

    Edwards, David L. / Cooke, William / Moser, Danielle et al. | NTRS | 2007