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  • Chemistry  (41,324)
  • GEOPHYSICS  (4,117)
  • LUNAR AND PLANETARY EXPLORATION  (3,082)
  • AERODYNAMICS  (2,967)
  • 1985-1989  (51,490)
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Years
Year
  • 1
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    Publication Date: 2019-08-28
    Description: This video describes Voyager 2's encounter with Neptune. Computer animation and actual data convey Voyager's discoveries such as turbulent storms and dark spots in Neptune's atmosphere, six new moons, Neptune's three rings, and the presence of frozen methane on Triton, as researchers at NASA's Jet Propulsion Laboratory describe Voyager's achievements.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: ASR-251 , NASA-TM-109361 , NONP-NASA-VT-94-198208
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  • 2
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    Publication Date: 2019-08-28
    Description: The Global Surface Radiation Budget Experiment, which determines if current climate models are accurate, is explained.
    Keywords: GEOPHYSICS
    Type: ASR-250 , NASA-TM-109612 , NONP-NASA-VT-93-190410
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  • 3
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    Publication Date: 2019-08-28
    Description: Early results from Voyager's pass of Uranus and its moon, Miranda, are shown.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: ASR-240 , NASA-TM-109619 , NONP-NASA-VT-93-190417
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  • 4
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    Publication Date: 2019-08-28
    Description: This videotape discusses NASA's plans for a lunar base. Additionally, the videotape features interviews with George Keyworth, James Beggs, and Harrison Schmidt.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: ASR-236 , NASA-TM-109607 , NONP-NASA-VT-93-190405
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  • 5
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    Publication Date: 2019-08-28
    Description: Issues, problems, and potential solutions of the lunar and Mars missions which will be undertaken in the first decade of the next century are discussed. Arguments are made for the feasibility and usefulness of a lunar base, and an evolutionary approach to a manned Mars mission involving a preliminary mission to Phobos is outlined. The Shuttle Z concept for both moon and Mars missions which involves a dual use of a spacecraft transfer stage operating also as a booster third stage is defined.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Spaceflight (ISSN 0038-6340); 31; 297-302
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  • 6
    Publication Date: 2019-08-28
    Description: Planetary maps being produced today will represent views of the solar system for many decades to come. The primary objective of the planetary cartography program is to produce the most complete and accurate maps from hundreds of thousands of planetary images in support of scientific studies and future missions. Here, the utilization of digital techniques and digital bases in response to recent advances in computer technology are emphasized.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-TM-4092 , NAS 1.15:4092
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  • 7
    Publication Date: 2019-08-28
    Description: A semianalytical approach is developed for the sensitivity analysis of linear unsteady aerodynamic loads. The semianalytical approach is easier to implement than the analytical approach. It is also computationally less expensive than the finite difference approach when used with panel methods which require a large number of panels. The semianalytical approach is applied to an isolated airfoil in a two-dimensional flow and rotating propfan blades in three-dimensional flow. Sensitivity coefficients with respect to nonshape-dependent variables are shown for some cases.
    Keywords: AERODYNAMICS
    Type: AIAA PAPER 88-2377 , Structures, Structural Dynamics and Materials Conference; Apr 18, 1988 - Apr 20, 1988; Williamsburg, VA; United States
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  • 8
    Publication Date: 2019-08-28
    Description: Papers are presented on satellite observations of new particle and field signatures associated with SAR arc field lines at magnetospheric heights, the structure of the polar oval from simultaneous observations of the optical emissions and particle precipitations during the period of high solar activity between 1981 and 1982, and SAR-arcs and emissions in the main trough of the electron concentration. Also considered are a model calculation of hydrogen Balmer emissions under various modes of proton precipitation, electron precipitation near L = 4, and an investigation of the thermosphere-ionosphere interaction by means of the neutral post-storm effect. Other topics include auroral electric field penetration into the middle-latitude trough, field-aligned currents and related phenomena in the cust, and the positive phase of ionospheric storms and its connection with the dayside cusp.
    Keywords: GEOPHYSICS
    Type: (ISSN 0273-1177)
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  • 9
    Publication Date: 2019-08-28
    Description: Discussed is new information recently published on the higher contents of siderophilic in the block breccia, fragments of coesite rocks in the Glubokinskiy series within the Kamenskiy astrobleme. New geological data which have refined the concept regarding the structure and age of the Kamenskiy astrobleme are presented.
    Keywords: GEOPHYSICS
    Type: NASA-TT-20212 , NAS 1.77:20212
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  • 10
    Publication Date: 2019-08-28
    Description: The need to study the lower thermosphere with the new instrument, data handling, and spacecraft technology available in the 1960s led to the formulation and establishment of the Atmospheric Explorer program. This book provides an overview of this program with particular emphasis on the AE3, AE4, and AE5 satellites, which represent early examples of problem-dedicated missions. Both the satellites and their instrumentation on the one hand and the experimental and scientific considerations in studying the thermosphere on the other are discussed.
    Keywords: GEOPHYSICS
    Type: NASA-SP-490 , NAS 1.21:490 , LC-87-14156
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