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  • Other Sources  (11)
  • GEOPHYSICS  (5)
  • SPACE VEHICLES  (5)
  • LUNAR AND PLANETARY EXPLORATION  (1)
  • Chemical Engineering
  • 2005-2009
  • 1990-1994
  • 1970-1974  (11)
  • 1972  (11)
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  • 2005-2009
  • 1990-1994
  • 1970-1974  (11)
Year
  • 1
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    Advanced design concepts for shuttle airframe structure (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The development of weight-saving advanced design concepts for shuttle airframe structure is presented. Design concepts under investigation employ selective composite reinforcement and/or efficient geometric arrangements. An effort to develop metallic panel designs which exploit the relaxation of smooth external-surface requirements for skin structure is reviewed. Available highlights from research and development studies which investigate the application of composite reinforcement to the design of two types of fuselage panels, a shear web, a large fuselage frame, and a landing-gear-door assembly are presented. Preliminary results from these studies suggest weight savings of 25 percent can be obtained.
    Keywords: SPACE VEHICLES
    Type: NASA Space Shuttle Technol. Conf.; p 537-572
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Space-Shuttle applications. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Discussion of the performance potential of the Space Shuttle and the high-energy transportation system to be derived from it. It is shown that, in addition to its cost effectiveness in earth-orbital missions, the Shuttle promises to be of major significance for future solar-system exploration. Eventually, the Shuttle will make possible the use of large interplanetary payloads launched at high velocities to the far reaches of the solar system.
    Keywords: SPACE VEHICLES
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Two successful geomagnetic-field-line tracing experiments. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Two field-line tracing experiments were conducted on an L = 1.26 magnetic flux tube over Kauai, Hawaii. Barium vapor was created by the detonation of a highly explosive shaped charge aligned with the geomagnetic field at a 467-km altitude. Barium ions traveled along the field line to the conjugate ionosphere in a tube 3 to 5 km in diameter, producing a visible streak along the entire 6900-km path length. Electric fields perpendicular to the magnetic field caused the ions to drift away from the true conjugate during transit, but extrapolation from subsequent ion drift rates allowed the conjugate to be identified and compared with several field models. Differing ion drift rates and directions at the conjugate points indicated that the electric field is not transferred unattenuated along field lines.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 77; June 1
    Format: text
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  • 4
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    Observations of fast auroral waves. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Results of simultaneous observation of a fast wave event from the Ester Dome Observatory (EDO) near College, Alaska, the Poker Flat Rocket Launching Facility (PKR), and Fort Yukon, Alaska (FYU). The display occurred on Mar. 27, 1971, and the general morphology is described and discussed. It is suggested that fast auroral waves occur when a preceding substorm has enhanced the particle population in the region of the magnetosphere near L = 6 in the midnight sector; then transverse hydromagnetic waves, associated with the onset of further local substorm activity, become visible through their action on this enhanced particle population as they propagate inwards in the equatorial region.
    Keywords: GEOPHYSICS
    Type: Planetary and Space Science; 20; Mar. 197
    Format: text
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  • 5
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    Effects of atmospheric aerosols on scattering reflected visible light from earth resource features (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The vertical variations in atmospheric light attenuation under ambient conditions were identified, and a method through which aerial photographs of earth features might be corrected to yield quantitative information about the actual features was provided. A theoretical equation was developed based on the Bouguer-Lambert extinction law and basic photographic theory.
    Keywords: GEOPHYSICS
    Type: NASA-CR-139382
    Format: application/pdf
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  • 6
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    Nuclear radiation environment analysis for thermoelectric outer planet spacecraft (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Neutron and gamma ray transport calculations were performed using Monte Carlo methods and a three-dimensional geometric model of the spacecraft. The results are compared with similar calculations performed for an earlier design.
    Keywords: SPACE VEHICLES
    Type: Proc. of the Natl. Symp. on Nat. and Manmade Radiation in Space; p 862-865
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  • 7
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    Ground pattern analysis in the Great Plains (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The author has identified the following significant results. During preliminary analysis of the ERTS-1 RBV band-2 images it was possible to detect many geologic features and to delineate several geologic formation boundaries. Also, the spatial frequency characteristics of some different geologic formations are distinguishable from each other. At the present time there is not enough data to provide any statistical evaluation of these differences, but it is hoped that more quantitative results will be produced within the next few months. Multispectral analysis will begin when the retrospective order for the other spectral bands of the first images is received. Since many geologic formation boundaries are visible on the single band that has been analyzed so far, even greater visibility is expected with the spectral information available in the additional bands.
    Keywords: GEOPHYSICS
    Type: E72-10122 , NASA-CR-128176
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  • 8
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    Diffusion models for Jupiter's radiation belt (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Solutions are given for the diffusion of trapped particles in a planetary magnetic field in which the first and second adiabatic invariants are preserved but the third is not, using as boundary conditions a fixed density at the outer boundary (the magnetopause) and a zero density at an inner boundary (the planetary surface). Losses to an orbiting natural satellite are included and an approximate evaluation is made of the effects of the synchrotron radiation on the energy of relativistic electrons. Choosing parameters appropriate to Jupiter, the electrons required to produce the observed synchrotron radiation are explained. If a speculative mechanism in which the diffusion is driven by ionospheric wind is the true explanation of the electrons producing the synchrotron emission it can be concluded that Jupiter's inner magnetosphere is occupied by an energetic proton flux that would be a serious hazard to spacecraft.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-CR-141967
    Format: application/pdf
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  • 9
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    Application of selected methods of remote sensing for detecting carbonaceous water pollution (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The use of aerial photography to determine the nature and extent of water pollution from carbonaceous materials is discussed. Flights were conducted over the Galveston Bay estuarine complex. Ground truth data were developed from field sampling of the waters in a region near the Houston Ship Channel. Tests conducted in the field were those for the following physical and chemical factors: (1) ph, (2) dissolved oxygen, (3) temperature, and (4) light penetration. Laboratory analyses to determine various properties of the water are described and the types of instruments used are identified. Results of the analyses are presented as charts and graphs.
    Keywords: GEOPHYSICS
    Type: NASA-CR-128824
    Format: application/pdf
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  • 10
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    Interaction of the space shuttle control system with pogo (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The asymmetric configuration of the space shuttle results in coupled pitch and axial vibration modes. This coupling results in interaction between the pogo and control systems. A detailed model of representative space shuttle structure, feedline, control, and engine systems revealed the coupled system may be unstable even though the pogo and control systems are stable individually. A method is developed for predicting the coupled system stability in terms of the stability of the separate systems.
    Keywords: SPACE VEHICLES
    Type: NASA-CR-2154 , MDC-G2961
    Format: application/pdf
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