+ Visit NASA.gov + Contact NASA   + Home Select Search Field * All Report - Patent Number Abstract *Accession Number *NASA Center *Author NameDocument IDKeywordsPublication Date *Title * Find Results With All of the words At least one of the words Enter Search Term  within returned results    Search Tips: Use only the fields with * to search NIX collection. Enclose terms in double quotation marks (") to search for exact phrases, ie: "space shuttle". NOTE: Commas and dashes are removed from search term by search engine. Select Reset Search button to start a new search. See Help for more tips. + NASA Center + Publication Year + Subject + Availability Options + Item/Media Type Selected Navigations: Author > Schultz, P. H. [x] Sort results by: NASA Center | Date Added to NTRS | Publication Year There are a total of 89 record(s) matching your query. Sorted by: Date Added To NTRS in Descending order Prev 1 2 3 4 5 6 7 8 9 Next  The spatial distribution and time evolution of impact-generated magnetic fields Author(s): Crawford, D. A.; Schultz, P. H. Abstract: The production of magnetic fields was revealed by laboratory hypervelocity impacts in easily vaporized targets. As quantified by pressure measurements, high frame-rate photography, and electrostatic probes, these impacts ... NASA Center: NASA (non Center Specific) Publication Year: 1991 Added to NTRS: 2008-05-31 Accession Number: 92N10878; Document ID: 19920001660 Styles of crater gradation in Southern Ismenius Lacus, Mars Author(s): Grant, J. A.; Schultz, P. H. Abstract: Preserved morphology around selected impact craters together with results from study of long term gradational evolution are used to assess processes responsible for crater modification in southern Ismenius Lacus. Results are ... NASA Center: NASA (non Center Specific) Publication Year: 1991 Added to NTRS: 2008-05-31 Accession Number: 92N10784; Document ID: 19920001566 Impact decapitation from laboratory to basin scales Author(s): Schultz, P. H.; Gault, D. E. Abstract: Although vertical hypervelocity impacts result in the annihilation (melting/vaporization) of the projectile, oblique impacts (less than 15 deg) fundamentally change the partitioning of energy with fragments as large as 10 ... NASA Center: NASA (non Center Specific) Publication Year: 1991 Added to NTRS: 2008-05-31 Accession Number: 92N10858; Document ID: 19920001640 Characteristics of ejecta and alluvial deposits at Meteor Crater, Arizona and Odessa Craters, Texas: Results from ground penetrating radar Author(s): Grant, J. A.; Schultz, P. H. Abstract: Previous ground penetrating radar (GRP) studies around 50,000 year old Meteor Crater revealed the potential for rapid, inexpensive, and non-destructive sub-surface investigations for deep reflectors (generally greater than ... NASA Center: NASA (non Center Specific) Publication Year: 1991 Added to NTRS: 2008-05-31 Accession Number: 92N10872; Document ID: 19920001654 Styles of ejecta emplacement under atmospheric conditions Author(s): Schultz, P. H. Abstract: Laboratory experiments provide essential first-order constraints on processes affecting ballistic ejecta and styles of ejecta emplacement under different atmospheric environments at planetary scales. The NASA-Ames Vertical ... NASA Center: NASA (non Center Specific) Publication Year: 1991 Added to NTRS: 2008-05-31 Accession Number: 92N10857; Document ID: 19920001639 Atmospheric effects on oblique impacts Author(s): Schultz, P. H. Abstract: Laboratory experiments and theoretical calculations often use vertical impact angles (90 deg) in order to avoid the complicating effect of asymmetry. Nevertheless, oblique impacts represent the most likely starting condition ... NASA Center: NASA (non Center Specific) Publication Year: 1991 Added to NTRS: 2008-05-31 Accession Number: 92N10856; Document ID: 19920001638 Gradational evolution of young, simple impact craters on the Earth Author(s): Grant, J. A.; Schultz, P. H. Abstract: From these three craters, a first order gradational evolutionary sequence can be proposed. As crater rims are reduced by backwasting and downwasting through fluvial and mass wasting processes, craters are enlarged by approx. ... NASA Center: NASA (non Center Specific) Publication Year: 1991 Added to NTRS: 2008-05-31 Accession Number: 92N10783; Document ID: 19920001565 The role of impact cratering for Mars sample return Author(s): Schultz, P. H. Abstract: The preserved cratering record of Mars indicates that impacts play an important role in deciphering Martian geologic history, whether as a mechanism to modify the lithosphere and atmosphere or as a tool to sample the planet. ... NASA Center: NASA (non Center Specific) Publication Year: 1988 Added to NTRS: 2008-05-30 Accession Number: 89N18352; Document ID: 19890008981 Oblique impacts: Catastrophic vs. protracted effects Author(s): Schultz, P. H. Abstract: Proposed impacts as the cause of biologic catastrophes at the end of the Cretaceous and Eocene face several enigmas: protracted extinctions, even prior to the stratigraphic cosmogenic signature; widespread but non-uniform ... NASA Center: NASA (non Center Specific) Publication Year: 1988 Added to NTRS: 2008-05-30 Accession Number: 89N21383; Document ID: 19890012012 Non-random cratering flux in recent time Author(s): Schultz, P. H. Abstract: Proposed periodic cycles of mass mortality have been linked to periodic changes in the impact flux on Earth. Such changes in the impact flux, however, also should be recorded on the Moon. Previous studies have concluded that ... NASA Center: NASA (non Center Specific) Publication Year: 1988 Added to NTRS: 2008-05-30 Accession Number: 89N21384; Document ID: 19890012013 Prev 1 2 3 4 5 6 7 8 9 Next  + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007