Download or read book Compositional Analysis and Classification of Projectile Residues in LDEF Impact Craters written by Friedrich Horz and published by . This book was released on 1992 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Compositional Analysis and Classification of Projectile Residues in Ldef Impact Craters written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-23 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 ...
Download or read book LDEF Materials Results for Spacecraft Applications written by and published by . This book was released on 1994 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book LDEF 69 Months in Space Third Post Retrieval Symposium Part 1 written by and published by . This book was released on 1995 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Conference Publication written by and published by . This book was released on 1993 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Orbital Debris written by Committee on Space Debris and published by National Academies Press. This book was released on 1995-06-21 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1993 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Penetration Experiments in Aluminum 1100 Targets Using Soda lime Glass Projectiles written by Friedrich Hörz and published by . This book was released on 1995 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book The Cosmic Dust Connection written by J. Mayo Greenberg and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Space Debris written by COSPAR. Scientific Commission B. B0.1-PEDAS1 Symposium and published by . This book was released on 2001 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Second LDEF Post Retrieval Symposium Abstracts written by and published by . This book was released on 1992 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In situ Impact Detection Techniques Interplanetary Dust and Future Mars Exploration written by COSPAR. Scientific Assembly and published by Elsevier Science & Technology. This book was released on 1995 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume details future exploration programme plans to Mars and also reports on investigations of Mars. Additionally, considerable space is devoted to in-situ impact techniques - derivation of physical properties and also the interaction of interplanetary dust with planets.
Download or read book Sample Return Missions to Small Bodies written by COSPAR. Scientific Commission B. B0.1 Symposium (Nagoya, Japan) and published by . This book was released on 2000 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Space Debris written by COSPAR. Scientific Commission B. Symposium BO. 7 and published by Elsevier Science & Technology. This book was released on 1997 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paperback. Space debris is a steadily growing hazard for all space activities. Despite a decreasing annual launch rate, the number and mass of space debris are increasing. The first confirmed casualty of space debris is the French spacecraft CERISE which was hit in 1996 by a fragment of a rocket upper stage. The twenty-eight papers presented in this volume address the main areas of current research in the field of space debris and meteoroids in the Earth's environment. New concerns arise with the planned satellite constellations in low and medium altitude orbital regions. These proceedings provide an up-to-date picture of the space debris research activities and contribute to an improved understanding of the space debris issue.
Download or read book LDEF 69 Months in Space Second Post Retrieval Symposium Part 2 written by and published by . This book was released on 1993 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document is a compilation of papers presented at the Second Long Duration Exposure Facility (LDEF) Post Retrieval Symposium. The papers represent the data analysis of the 57 experiments flown on the LDEF. The experiments include materials, coatings, thermal systems, power and propulsion, science (cosmic ray, interstellar gas, heavy ions, micrometeoroid, etc.), electronics, optics, and life science.
Download or read book Space Debris written by Walter Flury and published by Pergamon. This book was released on 1993 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paperback. Space surveillance has confirmed the increasing number of large and useless objects orbiting the Earth. Of the known 7000 objects which have a minimum size of about ten centimeters in low Earth orbit and about one metre in the geostationary orbit, only about 6% are active satellites. Over 40% are fragments of breakups of rocket upper stages and satellites. The increasing amount of man-made objects in space as a result of space operation now gives cause for concern. Several independent analyses conclude that current practices in space will eventually lead to collisions between Earth orbiting objects. The forty papers presented in this volume comprise an overview of the current situation and also outline measures which could be taken to control the growth of debris.
