NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Clustered impacts - Experiments and implicationsThe characteristics of impact by clusters of projectiles are experimentally studied by launching grouped projectiles of aluminum shot, steel shot, iron filings, and sand. Cratering efficiency is considered as a function of a dimensionless parameter related to projectile size and impact velocity. The effects of different target and projectile densities on cratering efficiency are examined. Crater morphology is addressed by considering a typical example, reviewing the systematics between cluster dispersion and crater morphology for vertical impacts, and examining oblique angle impacts which have relevance for planetary secondary cratering processes. These results are compared with impacts by single bodies with different strengths. The evolution of the ejecta plume for clustered impacts is compared to that for single-body impacts for vertical and oblique impacts from 1.3 to 1.8 km/s. The experimental results are discussed in the context of planetary surface processes, emphasizing processes in an atmosphere-free environment and secondary impact cratering.
Document ID
19850048379
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Schultz, P. H.
(Lunar and Planetary Institute, Houston, TX; Brown University Providence, RI, United States)
Gault, D. E.
(Murphys Center of Planetology Murphys, CA, United States)
Date Acquired
August 12, 2013
Publication Date
April 10, 1985
Publication Information
Publication: Journal of Geophysical Research
Volume: 90
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Accession Number
85A30530
Funding Number(s)
CONTRACT_GRANT: NASW-3389
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available