Compositional Analysis and Classification of Projectile Residues in LDEF Impact Craters PDF Download
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Author: Friedrich Horz
Publisher:
ISBN:
Category : Cosmic dust
Languages : en
Pages : 214
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Book Description
Contains preliminary analyses of residues of hypervelocity projectiles that encountered gold substrates exposed by instrument A0187-1 on the Long Duration Exposure Facility (LDEF). The purpose of this catalog is to provide detailed evidence and criteria that may be used to arrive at specific particle types on a case-by-case basis and to group such particles into compositional classes.
Author: Friedrich Horz
Publisher:
ISBN:
Category : Cosmic dust
Languages : en
Pages : 214
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Book Description
Contains preliminary analyses of residues of hypervelocity projectiles that encountered gold substrates exposed by instrument A0187-1 on the Long Duration Exposure Facility (LDEF). The purpose of this catalog is to provide detailed evidence and criteria that may be used to arrive at specific particle types on a case-by-case basis and to group such particles into compositional classes.
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781723544187
Category :
Languages : en
Pages : 214
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Book Description
This catalog contains preliminary analyses of residues of hypervelocity projectiles that encountered gold substrates exposed by instrument A0187-1 on the Long Duration Exposure Facility (LDEF). This instrument was on LDEF's trailing edge where relative encounter speeds should be lowest for any non-spinning platform in low Earth orbit (LEO). Approximately 0.6 m(exp 2) of Au substrates yielded 198 impact craters greater than 20 micrometers in diameter. Some 30 percent of the craters were made by natural cosmic dust particles and some 15 percent by man-made objects. Some 50 percent of all features, however, have residues, if any, that are beyond the detection threshold of the SEM-EDXA method used. The purpose of this catalog is to provide detailed evidence and criteria that may be used to arrive at specific particle types on a case-by-case basis and to group such particles into compositional classes. Clearly this is a somewhat interpretative undertaking. For that reason, we encourage and solicit critique and comments from those interested in the systematic analysis of all impact features on LDEF. Horz, Friedrich and Bernhard, Ronald P. Johnson Space Center NASA-TM-104750, S-678, NAS 1.15:104750 ...
Author:
Publisher:
ISBN:
Category : Materials
Languages : en
Pages : 566
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Book Description
Author: Arlene S. Levine
Publisher:
ISBN:
Category : Materials
Languages : en
Pages : 564
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 564
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 574
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Book Description
Author: Committee on Space Debris
Publisher: National Academies Press
ISBN: 0309587166
Category : Science
Languages : en
Pages : 225
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Book Description
Since the beginning of space flight, the collision hazard in Earth orbit has increased as the number of artificial objects orbiting the Earth has grown. Spacecraft performing communications, navigation, scientific, and other missions now share Earth orbit with spent rocket bodies, nonfunctional spacecraft, fragments from spacecraft breakups, and other debris created as a byproduct of space operations. Orbital Debris examines the methods we can use to characterize orbital debris, estimates the magnitude of the debris population, and assesses the hazard that this population poses to spacecraft. Potential methods to protect spacecraft are explored. The report also takes a close look at the projected future growth in the debris population and evaluates approaches to reducing that growth. Orbital Debris offers clear recommendations for targeted research on the debris population, for methods to improve the protection of spacecraft, on methods to reduce the creation of debris in the future, and much more.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 518
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Book Description
Author: Friedrich Hörz
Publisher:
ISBN:
Category : Aluminum alloys
Languages : en
Pages : 338
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Book Description
The cratering and penetration behavior of annealed aluminum 1100 targets, with thickness varied from several centimeters to ultra-thin foils less than 1 micrometer thick, were experimentally investigated using 3.2 mm diameter spherical soda-lime glass projectiles at velocities from 1 to 7 km/s.
Author: J. Mayo Greenberg
Publisher: Springer Science & Business Media
ISBN: 9401156522
Category : Science
Languages : en
Pages : 532
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Book Description
Solid particles are followed from their creation through their evolution in the Galaxy to their participation in the formation of solar systems like our own, these being now clearly deduced from observations by the Hubble Space Telescope as well as by IR and visual observations of protostellar disks, like that of the famous Beta Pictoris object. The most recent observational, laboratory and theoretical methods are examined in detail. In our own solar system, studies of meteorites, comets and comet dust reveal many features that follow directly from the interstellar dust from which they formed. The properties of interstellar dust provide possible keys to its origin in comets and asteroids and its ultimate origin in the early solar system. But this is a continuing story: what happens to the solid particles in space after they emerge from stellar sources has important scientific consequences since it ultimately bears on our own origins - the origins of solar systems and, especially, of our own earth and life in the universe.
