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  • ASTRONAUTICS (GENERAL)  (4)
  • GEOPHYSICS  (4)
  • MATHEMATICS  (4)
  • LUNAR AND PLANETARY EXPLORATION  (2)
  • EARTH RESOURCES AND REMOTE SENSING  (1)
  • 1
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    Bearing strength of the lunar soil (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A discussion is presented on the bearing strength and bearing load-penetration relations in lunar soil. These were measured in air as a function of bulk density. It was found that the relation between bulk density and the logarithm of the bearing capacity is about linear. Shapes of the load vs penetration curves were observed to be similar to those obtained with particulate material of terrestrial origin.
    Keywords: GEOPHYSICS
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 227-232
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Cracking of the lunar soil (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Rather than a pattern of cracks in an apparently flat surface, the Apollo 12 photographs suggest an irregular surface that consists of clods or fragments. The impression of flat tiles and crusting, obtained by monoscopic viewing, is an illusion. Instead, the lunar soil deforms and cracks in the same manner as homogeneous isotropic terrestrial soils of moderate bulk density, having a small amount of cohesion.
    Keywords: GEOPHYSICS
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 233-235
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Mars sample return through parking orbit (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: A Mars surface sample return mission using Mars direct entry and Mars parking orbit return is described. The mission is designed for a minimum energy requirement and is relatively simple in comparison to the alternative Mars orbital rendezvous mode. The design calls for minimal science, and uses a single Titan IIIE/Centaur launch vehicle. The primary science areas included are biology, biochemistry, geochemistry, and petrology, for detecting life, age dating, and determining chemical compositions and rock types. The total minimum sample requirement would be 30 g. Sampling conditions and recommended measurements are discussed. Maximum use of hardware and experience from the Mariner, Pioneer, and Viking missions is contemplated. The profile for a 1979 conjunction-class mission would include a total time of 1025 days, including one year in Mars parking orbit after sampling. The lander structure, components, and recovery alternatives are explained.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Astronautics and Aeronautics; 13; Jan. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    THERMAL PROPERTIES OF A SIMULATED LUNAR MATERIAL IN AIR AND IN VACUUM (1963)
    In:  Other Sources
    Details
    Publication Date: 2019-05-10
    Description: Thermal properties of simulated lunar materials in air and in a vacuum
    Keywords: MATHEMATICS
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    NASA TECHNICAL REPORTS
  • 5
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    EFFECTS OF SPACE ENVIRONMENT UPON PLASTICS AND ELASTOMERS (1963)
    In:  Other Sources
    Details
    Publication Date: 2019-05-10
    Description: Effects of vacuums, ionization, electromagnetic radiation and meteoroids on plastics, elastomers and organic coatings used in space vehicles
    Keywords: MATHEMATICS
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    NASA TECHNICAL REPORTS
  • 6
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    HIGH-TEMPERATURE TENSILE PROPERTIES OF GRAPHITES (1957)
    In:  Other Sources
    Details
    Publication Date: 2019-05-10
    Keywords: MATHEMATICS
    Type: JPL-PR-20-326
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  • 7
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    EVAPORATION EFFECTS ON MATERIALS IN SPACE (1963)
    In:  Other Sources
    Details
    Publication Date: 2019-05-10
    Description: Vacuum environmental effects on the evaporation, sublimation and decomposition rates of materials for space application
    Keywords: MATHEMATICS
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    NASA TECHNICAL REPORTS
  • 8
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    A prelude to interstellar flight (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A 20 to 50 year interstellar precursor mission extending 400 to 1000 AU from the solar system is outlined as a means of bringing out and solving engineering problems inherent in a star mission, and of studying the heliopause, the interstellar medium, and cosmic rays outside the heliosphere. Solar or laser sailing combined with a 500 kWe nuclear-electric propulsion system using fission would achieve a heliocentric excess velocity of 100km/s for the 32,000 kg spacecraft having a Shuttle derivative as a launch vehicle, and containing a Pluto flyby or separate orbiter powered by radioiosotope thermoelectric generators. X-band transmission using 40 w of power, a 15 m diameter spacecraft antenna and a 100 m receiving antenna on earth and providing 100 b/s is proposed, but a rate of 2 to 4 kb/s via 500 to 1000 w of power using the K-band and a 300 m diameter receiving antenna located on an Orbiting Deep Space Relay Station is also considered.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: Astronautics and Aeronautics; 18; Jan. 198
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  • 9
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    An interstellar precursor mission (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A mission out of the planetary system, with launch about the year 2000, could provide valuable scientific data as well as test some of the technology for a later mission to another star. Primary scientific objectives for the precursor mission concern characteristics of the heliopause, the interstellar medium, stellar distances (by parallax measurements), low energy cosmic rays, interplanetary gas distribution, and mass of the solar system. Secondary objectives include investigation of Pluto. Candidate science instruments are suggested. Individual spacecraft systems for the mission were considered, technology requirements and problem areas noted, and a number of recommendations made for technology study and advanced development. The most critical technology needs include attainment of 50-yr spacecraft lifetime and development of a long-life NEP system.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: NASA-CR-156152 , JPL-PUB-77-70
    Format: application/pdf
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  • 10
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    Aerospace technology can be applied to exploration 'back on earth' (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Applications of aerospace technology to petroleum exploration are described. Attention is given to seismic reflection techniques, sea-floor mapping, remote geochemical sensing, improved drilling methods and down-hole acoustic concepts, such as down-hole seismic tomography. The seismic reflection techniques include monitoring of swept-frequency explosive or solid-propellant seismic sources, as well as aerial seismic surveys. Telemetry and processing of seismic data may also be performed through use of aerospace technology. Sea-floor sonor imaging and a computer-aided system of geologic analogies for petroleum exploration are also considered.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Oil and Gas Journal; Aug. 15
    Format: text
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