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  • Aurora
  • Geoelektrik
  • Lunar and Planetary Science and Exploration
  • Quantum optics, physics of lasers, nonlinear optics, classical optics
  • 2015-2019
  • 1965-1969  (9)
  • 1967  (9)
Collection
Keywords
Years
  • 2015-2019
  • 1965-1969  (9)
Year
  • 1
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    Unknown
    In:  CASI
    Publication Date: 2019-06-27
    Description: Manned orbiting stopover round trips to Venus are studied for departure dates between 1975 and 1986 over a range of trip times and stay times. The use of highly elliptic parking orbits at Venus leads to low initial weights in Earth orbit compared with circular orbits. For the elliptic parking orbit, the effect of constraints on the low altitude observation time on the initial weight is shown. The mission can be accomplished with the Apollo level of chemical propulsion, but advanced chemical or nuclear propulsion can give large weight reductions. The Venus orbiting mission weights than the corresponding Mars mission.
    Keywords: Lunar and Planetary Science and Exploration
    Type: NASA-TM-X-52311
    Format: application/pdf
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  • 2
    Publication Date: 2019-07-23
    Description: One of the primary functions of the Lunar Orbiter Program was to provide high-resolution photographic coverage of potential Apollo landing sites. The photographs were screened by using Apollo lunar landing criteria to exclude rough areas and to select the smoothest sites for further study. On this basis, eight potential landing areas have been located and are undergoing detailed analysis.
    Keywords: Lunar and Planetary Science and Exploration
    Type: NASA-TM-X-58014 , JSC-E-DAA-TN70519
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  • 3
    Publication Date: 2019-06-27
    Description: The purpose of the first application of the "Successive Transformations Method" described in the second report was to determine, for a manned spacecraft, the optimum landing site on the moon. The results obtained, made by extrapolating the temperature TO furnished by Surveyor, can be summarized as follows: (1) The method is efficient in allowing selection of the optimum landing area. ( 2 ) The zrea selected is extensive and relatively flat; consequently, it is sufficient to allow trine for the difficult landing operation which results from the high speed of the spacecraft when reaching the moon. ( 3 ) The relative temperature obtained is lower than that where Surveyor landed. In this third report, a second application of the "Successive Transformations" is described to determine the safest conditions of a given landing site for the astronaut, especially in relation to determining the composition of the lunar surface material. As a means of accomplishing this task, it is the intent of this paper to analyze lunar craters since they are present over so much of the lunar surface.
    Keywords: Lunar and Planetary Science and Exploration
    Type: NASA-TM-X-69484 , REPT-3 , JSC-E-DAA-TN65505
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  • 4
    Publication Date: 2019-06-27
    Description: Report 1 of these studies described a basic method for predicting lunar surface temperatures, using readings recorded by Surveyor I and extrapolating to obtain surface temperatures in other selected areas. The areas selected were those considered as potential Apollo landing sites. This second report indicates that the temperature isotherms are directly related to the topographical profile of the surface areas they cover. If, after further observations by Surveyor 11, it becomes evident that the "Successive Transformation Method" provides accurate temperature data, this technique would become a valuable tool for charting the profile of any remote surface where manned spacecraft could be landed.
    Keywords: Lunar and Planetary Science and Exploration
    Type: NASA-TM-X-69486 , REPT-2 , 671-40-030 , JSC-E-DAA-TN65504
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  • 5
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    In:  CASI
    Publication Date: 2019-06-27
    Description: Surveyor III soft-landed on the Moon at 00:04 GMT on April 20, 1967. Data obtained have significantly increased our knowledge of the Moon. The Surveyor III spacecraft was similar to Surveyor I; the only major change in scientific instrumentation was the addition of a soil mechanics surface sampler. Surveyor III results at this preliminary evaluation of data give valuable information about the relation between the surface skin of under-dense material responsible for the photometric properties and the deeper layers of material whose properties resemble those of ordinary terrestrial soils. In addition, they provide new insight into the relation between the general lunar surface as seen by Surveyor I and the interior of a large subdued crater. The new results have also contributed to our understanding of the mechanism of downhill transport. Many critical questions cannot, however, be answered until final reduction of experimental data.
    Keywords: Lunar and Planetary Science and Exploration
    Type: NASA-CR-106136 , JPL-PD-125
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  • 6
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    In:  CASI
    Publication Date: 2019-08-14
    Description: Lunar surface, temperature, mechanical properties, and geological observations from Surveyor 5 spacecraft soft landing
    Keywords: Lunar and Planetary Science and Exploration
    Type: NASA-CR-91361 , JPL-TR-32-1246
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  • 7
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    In:  Other Sources
    Publication Date: 2019-08-14
    Description: Lunar soil composition determined to be porous fine-grain moderately cohesive rock powder, from Surveyor I and Luna IX pictures
    Keywords: Lunar and Planetary Science and Exploration
    Type: Icarus; 6; p. 254-269
    Format: text
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  • 8
    Publication Date: 2019-08-10
    Description: No abstract available
    Keywords: Lunar and Planetary Science and Exploration
    Type: NASA-TM-X-72951 , W67-10642 , N76-70875 , JSC-E-DAA-TN70557
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  • 9
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    In:  Other Sources
    Publication Date: 2019-08-14
    Description: Permafrost layer existence beneath lunar surface, noting possible detection techniques
    Keywords: Lunar and Planetary Science and Exploration
    Type: Planetary and Space Science; 15; p. 771-774
    Format: text
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