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  • LUNAR AND PLANETARY EXPLORATION  (3)
  • AERODYNAMICS
  • 1985-1989  (3)
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  • 1
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    Evidence for mass-loading of the Venus magnetosheath (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The observed magnetic field configuration in the Venus magnetosheath contains information about the solar wind mass-loading processes occurring as a result of the extension of the neutral atmosphere into the magnetosheath. In this paper, magnetic field signatures of various mass-loading processes are discussed and experimental results from the Pioneer Venus Orbiter magnetometer experiment are examined for evidence of these signatures. The data suggest that the -V(bar)XB(bar) acceleration process, stochastic pickup of ionospheric ions, and J(bar)XB(bar) force 'scavenging' at the ionopause all occur at various times.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Advances in Space Research (ISSN 0273-1177); 5; 4 19
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Solar wind flow about the outer planets - Gas dynamic modeling of the Jupiter and Saturn bow shocks (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: It has been found that the solar wind is diverted about planets through the formation of bow shocks which heat and deflect the flow. These observations are based on missions concerned with Mercury, Venus, earth, and Mars during the 1960s and 1970s. The present study has the objective to extend to Jupiter and Saturn certain aspects of the analyses which have been carried out on the terrestrial planets. In particular, the Pioneer 10 and 11 and Voyager 1 and 2 observations near Jupiter and Saturn are used to characterize the relevant upstream flow parameters at 5 and 9 AU. Attention is given to solar wind parameters, bow shock and magnetopause models, and the solar wind standoff distance, and aspects of gas-dynamic modeling.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research (ISSN 0148-0227); 90; 6275-628
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    NASA TECHNICAL REPORTS
  • 3
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    A three dimensional gasdynamic model for solar wind flow past nonaxisymmetric magnetospheres - Application to Jupiter and Saturn (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The gasdynamic convected magnetic field model of Spreiter et al. (1966) and Spreiter and Stahara (1985) for predicting solar wind flow past a planetary magnetoionopause obstacle is extended to three dimensions and applied to Jupiter and Saturn, in which the effects of rapid spin, large size, and ring current phenomena are believed to result in broadening of their magnetospheres near the planetary equatorial plane. The computational procedures of the model are described, and the calculated results are presented for a number of magnetospheres of elliptic cross sections with values ranging from 1 to 2 for the ratio a/b between the major (equatorial) and minor (polar) axes. For Jupiter, the results indicate a broadening to a/b of about 1.754, a value consistent with previous estimates determined from independent calculations. For Saturn, a smaller broadening to a/b of about 1.25 is indicated.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research (ISSN 0148-0227); 94; 13353-13
    Format: text
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    NASA TECHNICAL REPORTS
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