| Theoretical and Observational Studies of Meteor Interactions with the Ionosphere |
01 JUN 2006 |
31 pages |
| Authors:
P. Colestock; S. Close; John Zinn; LOS ALAMOS NATIONAL LAB NM
|
 | An intense flux of small-mass meteors has been seen in large-aperture radar scattering for many years. At high altitudes, these meteoroids routinely damage orbiting satellites by both direct impact as well as spacecraft charging. This flux is believed to make up the major portion of mass flux from space. At lower altitudes, meteoroids affect ionospheric and thermospheric processes by depositing heavy metallic atoms, ions and dust. Preliminary analysis of meteors ... |
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| Evaporation of High Speed Sporadic Meteors |
2004 |
5 pages |
| Authors:
Edmond Murad; C. Roth; RADEX INC BEDFORD MA
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| Recent measurements conducted at the Arecibo Observatory report high- speed sporadic meteors having velocities near 50 km/s. The results seem to indicate a bimodal velocity distribution in the sporadic meteors (maxima at approximately 20 km/s and approximately 50 km/s). The particles have a maximum mass of approximately 1 microgram. This paper will present an analysis of the ablation of 1 microgram meteoroids having velocities of 20, 30, 50 and 70 ... |
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| Analysis of the NASA Shuttle Hypervelocity Impact Database |
SEP 2003 |
93 pages |
| Authors:
Michael S. Stucky; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| A statistical analysis of the NASA Space Shuttle Hypervelocity Impact Database to find correlations between meteoroid and orbital debris (M/OD) impacts on the shuttle orbiter fleet and specific mission parameters; Inclination, Altitude, Duration and Year, M/OD impact data, regardless of location, particle type or mission was examined first, followed by the subcategories of Window data, Radiator data, Reinforced Carbon-Carbon (RCC) data, and Flexible Reusable Surface Insulation (FRSI) data, In an ... |
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| 2001 Leonid Meteoroid Storm |
15 DEC 2001 |
16 pages |
| Authors:
D. K. Lynch; R. W. Russell; G. E. Peterson; AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS
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| We present the latest predictions about the November 2001 Leonid Meteor storms and discuss their possible consequences and mitigation strategies. |
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| Proceedings of the Meteoroids 2001 Conference |
NOV 2001 |
641 pages |
| Authors:
SWEDISH INST OF SPACE PHYSICS KIRUNA
|
| The Final Proceeding for Meteroroids 2001, 6 August 2001 - 10 August 2001. This conference will cover: Historical observations and perspectives on meteoroids; Dynamics, sources and spatial distribution of meteoroids including sporadic, swarm and interstellar meteoroids; Physics and chemistry of meteoroid interaction process in the atmosphere including both head echo and trail effects; Impacts of meteoric constituents on atmospheric phenomena; Hypervelocity impact effects on spacecraft; Leonids - meteor storms and ... |
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| Discovery of Leonid Meteoric Cloud |
29 OCT 1999 |
13 pages |
| Authors:
R. Nakamura; Y. Fujii; M. Ishiguro; K. Morishige; S. Yokogawa; KOBE UNIV (JAPAN)
|
| A meteoric cloud is a faint glow of sunlight scattered by the small meteoroids in the trail along a parent comets orbit. Here we report the first detection of the meteoric cloud associated with the Leonid meteor stream. Our photometric observations, performed on Mauna Kea, Hawaii, reveal the cloud as a local enhancement in sky brightness during the meteor shower in 1998. The radius of the ... |
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| The Hazard to Civilization from Fireballs and Comets |
04 JUN 1996 |
5 pages |
| Authors:
P. A. Charles; OXFORD UNIV (UNITED KINGDOM) DEPT OF ASTROPHYSICS
|
| Asteroids which pass close to the Earth have been fully recognized by mankind for only about 20 years. The present report, then, is concerned with those other celestial bodies recorded by mankind since the dawn of civilization which either miss or impinge upon the Earth and which have also been despised. Now known respectively as comets (>1 kilometer in size) and meteoroids (<10 meters in size), it is the fireballs ... |
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| An Extraterrestrial Influence During the Current Glacial-Interglacial |
01 JUL 1993 |
32 pages |
| Authors:
S. Clube; D. J. Asher; OXFORD UNIV (UNITED KINGDOM) DEPT OF PHYSICS
|
| Evidence is presented for a category of inner Solar System fragmentation events involving substantially devolatilized cometary bodies which not only give rise to dust singularities responsible for tails, antitails and trails but also provide the bulk of the fragile meteoroidal material reaching the Earth. The most prominent of these events are apparently associated with a swarm of such bodies that moves within the 7:2 Jovian mean motion resonance. Assuming the ... |
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| Meteoroid and Debris Impact Features Documented on the Long Duration Exposure Facility |
AUG 1990 |
598 pages |
| Authors:
T. See; M. Albrooks; D. Atkinson; C. Simon; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HOUSTON TX LYNDON B JOHNSON SPACE CENTER
|
| The Long Duration Exposure Facility (LDEF) was host to several individual experiments designed to characterize aspects of the meteoroid and space debris environment in low Earth orbit. It was realized from the very start, however, that the most complete way to accomplish this goal was to exploit the meteoroid and debris record of the entire LDEF. The Meteoroid and Debris Special Investigation Group (M&D SIG) was organized to achieve this ... |
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| The 'UFO' of July 24, 1981: A Discussion with Comrade Zhang Zhousheng |
11 APR 1983 |
|
| Authors:
Yan Liu; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| An Investigation of Spray Velocity Resulting from High-Velocity Penetration of Thin Plates by Disks |
SEP 1966 |
32 pages |
| Authors:
John D. DiBattista; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CENTER
|
| An analysis based on one-dimensional shock-wave theory is presented to study the maximum velocity of the spray emanating from the rear surface of a thin meteoroid bumper. A set of experiments was designed to evaluate the analytical results. The targets used were 0.0025-cm-thick 11 aluminum foil and 0.041-cm-thick 1100 H14 aluminum plate. The projectiles used were made of tungsten and were disk shaped, 0.56 cm in diameter, and either 0.076 ... |
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| Significance of Photographic Meteor Data in the Design of Meteoroid Protection for Large Space Vehicles |
AUG 1965 |
44 pages |
| Authors:
Nestor Clough; Seymour Lieblein; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER
|
| Described herein are the method of obtaining photographic meteor data in the mass range of 10 sub -2 to 10 sub 0 gram and the treatment of these data to provide useful engineering relations for protecting large space vehicle components against meteoroid impact. The assumptions needed to convert these data to meteoroid masses and densities are discussed, and the effects of these assumptions on design relations are shown. The inferred ... |
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| The Micrometeoroid Satellite Explorer XIII (1961 CHI). Collected Papers on Design and Performance |
NOV 1964 |
201 pages |
| Authors:
Charles T. D'Aiutolo; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CENTER
|
| NASA Micrometeoroid Satellite Explorer XIII (1961 Chi) was developed to obtain a measure of the micrometeorid penetration hazard to spacecraft by recording penetrations of thin materials. In addition to providing engineering data on this problem, the satellite was designed to measure the space density of cosmic dust for particle masses of 3 X 10 sub -7 grams or greater, 3 x 10 sub-8 grams or greater, and 3 x l0 ... |
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| Hypervelocity Impact Damage Characteristics in Armored Space Radiator Tubes |
SEP 64 |
45 pages |
| Authors:
Seymour Lieblein; Nestor Clough; A. R. McMillian; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER
|
| Described herein are the results of an exploratory experimental research program to determine the damage that might be inflicted on space radiator configurations by the impact of a meteoroid. The meteoroid hazard is discussed, and the present knowledge of crater formation under conditions of hypervelocity impact is analyzed The experimental program was conducted under NASA contract on the ballistics range facilities of the General Motors Corporation Defense Research Laboratories in ... |
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| Micrometeoroid Satellite (Explorer XVI) Stainless-Steel Penetration Rate Experiment |
AUG 1964 |
19 pages |
| Authors:
Elmer H. Davison; Paul C. Winslow Jr; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER
|
| A successful experiment to assess the meteoroid hazard to thin stainless- steel skin material was flown as part of the Explorer XVI satellite. A total initial area of 3.625 square feet consisting of 0.001-, 0.003-, and 0. 006-inch- thick AlSl 304 stainless-steel segments was exposed in space for a period of 221 days. The 0.001-inch-thick surface experienced six penetrations, the 0.003-inch-thick surface experienced one penetration, and the 0.006-inch- thick surface ... |
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| Micrometeoroid Satellite (Explorer XIII) Stainless-Steel Penetration Rate Experiment |
OCT 1963 |
49 pages |
| Authors:
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER
|
| An experiment to assess the meteoroid hazard to thin stainless-steel skin material was flown as part of the XIII satellite. A total area of 3.75 square feet consisting of 3- and 6-mil-thick AISI 304 stainless-steel segments was exposed in space for a period of approximately 3 days. There were no penetrations In the exposed area during the data gathering lifetime of the experiment This report describes the development of the ... |
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| A Comparison of Meteor Activity During the Igy Period, Taken from Visual, Radar, and Telescopic Observations at Ashkhabad |
22 SEP 60 |
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| Authors:
I. S. Astapovich; DEPARTMENT OF COMMERCE WASHINGTON DC
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