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  • 1980-1984  (4)
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  • 1
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    Three Mars years - Viking Lander 1 imaging observations (1983)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The Mutch Memorial Station (Viking Lander 1) on Mars acquired imaging and meteorological data over a period of 2245 martian days (3.3 martian years). This article discusses the deposition and erosion of thin deposits (ten to hundreds of micrometers) of bright red dust associated with global dust storms, and the removal of centimeter amounts of material in selected areas during a dust storm late in the third winter. Atmospheric pressure data acquired during the period of intense erosion imply that baroclinic disturbances and strong diurnal solar tidal heating combined to produce strong winds. Erosion occurred principally in areas where soil cohesion was reduced by earlier surface sampler activities. Except for redistribution of thin layers of materials, the surface appears to be remarkably stable, perhaps because of cohension of the undisturbed surface material.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Science (ISSN 0036-8075); 222; 463-468
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Analysis of condensates formed at the Viking 2 lander site - The first winter (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Relative surface albedo, spectral reflectance estimates and a limited photometric function are reduced from Viking 2 lander data obtained during a 249 Mars day period, in the lander's first year, when a light ground covering appeared on the surface. During the deposition, surface broadband albedo more than doubled and blue reflectance increased by a factor of 4.0. Comparison of lander data with earlier laboratory measurements of CO2 and H2O frosts and snows shows that reflectance estimates do not resemble either of those solids. The condensate reflectance resembles that of the surface after the covering disappeared. The covering may have been colored by dust which fell before it, by dust mixed with it, or by dust on top of it; but the data strongly support a mixture of dust with H2O and CO2 solids. The covering thickness is estimated to be between 0.5 and a few millimeters.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Icarus; 47; Aug. 198
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Viking lander imaging investigation during extended and continuation automatic missions. Volume 1: Lander 1 picture catalog of experiment data record (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: All images returned by Viking Lander 1 during the extended and continuation automatic phases of the Viking Mission are presented. Listings of supplemental information which describe the conditions under which the images were acquired are included together with skyline drawings which show where the images are positioned in the field of view of the cameras. Subsets of the images are listed in a variety of sequences to aid in locating images of interest. The format and organization of the digital magnetic tape storage of the images are described as well as the mission and the camera system.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-RP-1068 , L-14054-VOL-1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Viking lander imaging investigation during extended and continuation automatic missions. Volume 2: Lander 2 picture catalog of experiment data record (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Images returned by the two Viking landers during the extended and continuation automatic phases of the Viking Mission are presented. Information describing the conditions under which the images were acquired is included with skyline drawings showing the images positioned in the field of view of the cameras. Subsets of the images are listed in a variety of sequences to aid in locating images of interest. The format and organization of the digital magnetic tape storage of the images are described. A brief description of the mission and the camera system is also included.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-RP-1068-VOL-2 , L-14054
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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