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  • 1
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    The interplanetary and near-Jupiter meteoroid environments (1974)
    American Geophysical Union
    Details
    Publikationsdatum: 1974-09-01
    Print ISSN: 0148-0227
    Digitale ISSN: 2156-2202
    Thema: Geologie und Paläontologie
    Publiziert von American Geophysical Union
    Standort Signatur Erwartet Verfügbarkeit
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    AKTUELLE ARTIKEL
  • 2
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    Results of Pioneer 10 and 11 Meteoroid Experiments: Interplanetary and near-Saturn (1980)
    American Geophysical Union
    Details
    Publikationsdatum: 1980-01-01
    Print ISSN: 0148-0227
    Digitale ISSN: 2156-2202
    Thema: Geologie und Paläontologie
    Publiziert von American Geophysical Union
    Standort Signatur Erwartet Verfügbarkeit
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    AKTUELLE ARTIKEL
  • 3
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    Space debris impact experiment (S0001) (1984)
    In:  CASI
    Details
    Publikationsdatum: 2006-02-14
    Beschreibung: The specific objectives of this experiment are to establish the population and size distribution of meteoroids in the mass range from 10 to the minus 10 power to 10 to the minus 4 power G, to establish the current population of man-made debris in the same mass range, and to obtain data on the physical properties (composition and density) of meteoroids.
    Schlagwort(e): ASTROPHYSICS
    Materialart: Long Duration Exposure Facility (LDEF); p 136-137
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 4
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    Manmade orbital debris studies at NASA Langley (1985)
    In:  CASI
    Details
    Publikationsdatum: 2006-02-14
    Beschreibung: In the past, flight experiments to define the meteoroid environment near the Earth and in interplanetary space were undertaken. The effectiveness of meteoroid bumpers was investigated. These flight experiments were aboard Pioneer 10, Pioneer 11, and Explorer 46. Hypervelocity impact tests were conducted in the laboratory to study protective structures and the composition of meteoroids from the hundreds of meteor spectra obtained. It was also found that manmade debris presented a similar hazard to spacecraft near the Earth. An assessment of that hazard is made in this paper. An analysis of the collision probability problem with much attention given to the population of small untrackable fragments created during explosions is presented.
    Schlagwort(e): ASTRONAUTICS (GENERAL)
    Materialart: NASA. Lyndon B. Johnson Space Center Orbital Debris; p 45-68
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 5
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    The interplanetary and near-Jupiter meteoroid environments (1974)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: The meteoroid penetration detectors on the Pioneer 10 spacecraft recorded 67 meteoroid penetrations through the 25-micron stainless steel test material while the spacecraft was between 1.0 and 5.1 AU. Ten of these penetrations occurred during the encounter with Jupiter. The cumulative spatial density of meteoroids with masses greater than 2 nanograms has been calculated from these data for interplanetary space and for the near-Jupiter space. The spatial density is found to be essentially constant in interplanetary space between 1 and 5 AU, approximately 1 meteoroid per cubic km, and 1-2 orders of magnitude greater near Jupiter. There was no increase in the spatial density of meteoroids in the asteroid belt and hence no evidence that there is a significant asteroidal component of 2-nanogram meteoroids. It is uncertain whether the meteoroids detected near Jupiter were in orbit about Jupiter or were gravitationally focused toward the planet from solar orbits.
    Schlagwort(e): SPACE SCIENCES
    Materialart: Journal of Geophysical Research; 79; Sept. 1
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 6
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    Interplanetary and near-Jupiter meteoroid environments - Preliminary results from the meteoroid detection experiment (1974)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: Data on interplanetary and near-Jupiter micrometer-sized particle encounters from the meteoroid-detection experiment on Pioneer 10 indicate that Jupiter is much 'dustier' than interplanetary space. Whereas the near-earth particulate flux showed very little increase over the interplanetary flux, the near-Jupiter penetration flux was over two orders of magnitude higher than the interplanetary flux.
    Schlagwort(e): SPACE SCIENCES
    Materialart: Science; 183; Jan. 25
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 7
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    Lunar lava tube radiation safety analysis (2002)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-24
    Beschreibung: For many years it has been suggested that lava tubes on the Moon could provide an ideal location for a manned lunar base, by providing shelter from various natural hazards, such as cosmic radiation, meteorites, micrometeoroids, and impact crater ejecta, and also providing a natural environmental control, with a nearly constant temperature, unlike that of the lunar surface showing extreme variation in its diurnal cycle. An analysis of radiation safety issues on lunar lava tubes has been performed by considering radiation from galactic cosmic rays (GCR) and Solar Particle Events (SPE) interacting with the lunar surface, modeled as a regolith layer and rock. The chemical composition has been chosen as typical of the lunar regions where the largest number of lava tube candidates are found. Particles have been transported all through the regolith and the rock, and received particles flux and doses have been calculated. The radiation safety of lunar lava tubes environments has been demonstrated.
    Schlagwort(e): Aerospace Medicine
    Materialart: Journal of radiation research (ISSN 0449-3060); Volume 43 Suppl; S41-5
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 8
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    Pioneer 11 meteoroid detection experiment - Preliminary results (1975)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: The concentration of meteoroids of mass about 0.01 microgram in interplanetary space, in the asteroid belt, and near Jupiter has been measured. The data confirm the Pioneer 10 observation that the asteroid belt is not highly populated with small meteoroids, suggest that the high concentration of small particles around Jupiter is the result of gravitational focusing, and provide an indication of the mass distribution of meteoroids in interplanetary space.
    Schlagwort(e): LUNAR AND PLANETARY EXPLORATION
    Materialart: Science; 188; May 2
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 9
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    Preliminary comparison of laser and solar space power systems (1983)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-18
    Beschreibung: Four laser receiver systems are compared to onboard solar photovoltaic power generation for spacecraft electrical requirements. The laser photovoltaic and laser MHD receivers were found to be lighter than a comparable planar solar photovoltaic system. The laser receiver also shows less drag at lower altitudes. Panel area is also reduced for the laser receiver allowing fewer Shuttle trips for construction. Finally, it is shown that a 1 megawatt laser and receiver system might be constructed with less weight than a comparable planar solar photovoltaic system.
    Schlagwort(e): SPACECRAFT PROPULSION AND POWER
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 10
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    Enabling lunar and space missions by laser power transmission (1992)
    In:  CASI
    Details
    Publikationsdatum: 2013-08-31
    Beschreibung: Applications are proposed for laser power transmission on the Moon. A solar-pumped laser in lunar orbit would beam power to the lunar surface for conversion into either electricity or propulsion needs. For example, lunar rovers could be much more flexible and lighter than rovers using other primary power sources. Also, laser power could be absorbed by lunar soil to create a hard glassy surface for dust-free roadways and launch pads. Laser power could also be used to power small lunar rockets or orbital transfer vehicles, and finally, photovoltaic laser converters could power remote excavation vehicles and human habitats. Laser power transmission is shown to be a highly flexible, enabling primary power source for lunar missions.
    Schlagwort(e): LUNAR AND PLANETARY EXPLORATION
    Materialart: NASA. Johnson Space Center, The Second Conference on Lunar Bases and Space Activities of the 21st Century, Volume 1; p 69-73
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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