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  • SPACE SCIENCES  (7)
  • 1970-1974  (7)
  • 1955-1959
  • 1925-1929
  • 1
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    Surface electrical properties experiment (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The surface electrical properties (SEP) experiment was used to explore the subsurface material of the Apollo 17 landing site by means of electromagnetic radiation. The experiment was designed to detect electrical layering, discrete scattering bodies, and the possible presence of water. From the analysis of the data, it was expected that values of the electrical properties (dielectric constant and loss tangent) of lunar material in situ would be obtained. The basic principle of the SEP experiment is interferometry. This principle involves only the interference of two or more waves to produce an interference pattern. The inversion of the interference pattern in terms of the spatial distribution of the electrical properties is the basic aim of the experiment (fig. 15-1). The experiment is most easily understood in terms of a single dipole antenna for radiating electromagnetic energy and a loop receiver for measuring the magnitudes of the fields.
    Keywords: SPACE SCIENCES
    Type: NASA. Johnson Space Center Apollo 17 Prelim. Sci. Rept.; 14 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Abort separation of the shuttle (1972)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A sensitivity analysis of the factors which affect a successful abort maneuver following a space shuttle launching is presented. Wind tunnel tests were conducted using optimum simulation techniques and data acquisition procedures. Static stability, dynamic stability, and local loads were investigated. It is concluded that parallel abort separation of the space shuttle components is possible at both high and low dynamic pressures. Successful separation is dependent upon configuration, Mach number, rocket exhaust impingement and relative position and attitude of the stages.
    Keywords: SPACE SCIENCES
    Type: Space Shuttle Aerothermodyn. Tech. Conf., vol. 4 p1105-1164 (SEE N72-20880 11-31)
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Research related to measurements of atomic species in the earth's upper atmosphere Final report (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Interaction kinetics of atomic oxygen and hydrogen on metal surfaces of satellite-borne mass spectrometers
    Keywords: SPACE SCIENCES
    Type: NASA-CR-111117
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Simple method of using onboard optical measurements to predict the orbit established after the lunar-ascent-transfer orbit (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Onboard optical measurements of angles for orbit prediction established after lunar-ascent and transfer orbits
    Keywords: SPACE SCIENCES
    Type: NASA-TN-D-5618 , L-6680
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    The magnetosphere of Jupiter as observed with Pioneer 10. I - Instrument and principal findings (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Description of the first in situ observations of energetic electrons of energy greater than 0.06 MeV in the magnetosphere of Jupiter during November-December 1973. The outer magnetosphere has the form of a thin disklike quasi-trapping region extending from about 20 to over 100 Jovian radii. This magnetodisk is confined near the magnetic equatorial plane and has approximate axial symmetry about the magnetic axis of the planet. The observations inside a radial distance of 12 Jovian radii are well organized by a centered dipolar model of the planet's magnetic field with a tilt of 9.5 plus or minus 0.5 deg to the rotational axis and with pole at a system III longitude of 230 plus or minus 3 deg. Absolute omnidirectional intensities of electrons within the stable trapping region inside 20 Jovian radii are given for five energy ranges greater than 0.06, 0.55, 5.0, 21, and 31 MeV.
    Keywords: SPACE SCIENCES
    Type: AD-A000274 , Journal of Geophysical Research; 79; Sept. 1
    Format: text
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  • 6
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    Energetic electrons in the magnetosphere of Jupiter (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Observations of energetic electrons (above 7 MeV) show that the outer magnetosphere of Jupiter consists of a thin disklike, quasi-trapping region extending from about 20 to 100 planetary radii. This magnetodisk is confined to the vicinity of the magnetic equatorial plane and appears to be an approximate figure of revolution about the magnetic axis of the planet. Hard trapping is observed within a radial distance of about 20 Jovian radii. The omnidirectional intensity of electrons with energy above 21 MeV between 3 and 20 Jovian radii is described by a provisional expression in terms of radial distance and magnetic latitude. There is tentative evidence for mild effects of the Galilean satellite Europa and possibly Io and Ganymede but not Callisto.
    Keywords: SPACE SCIENCES
    Type: Science; 183; Jan. 25
    Format: text
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  • 7
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    Surface electrical properties experiment study phase, volume 1 (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The evolution of a conceptual design of the flight hardware for the surface electrical properties experiment (SEP), the definition of requests for proposals, the analysis of proposals submitted by prospective flight hardware subcontractors, and recommendations for the flight configuration to be implemented are discussed. Initial efforts were made to assess the electromagnetic environment of the SEP experiment. An EMI receiver and tri-loop antenna were constructed and tests of opportunity were performed with a lunar roving vehicle (LRV). Initial analyses were made of data from these tests with support from this contract, analyses which were continued in depth under the hardware contract.
    Keywords: SPACE SCIENCES
    Type: NASA-CR-128918
    Format: application/pdf
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