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  • Other Sources  (3)
  • Lunar and Planetary Science and Exploration  (2)
  • Inorganic, Organic and Physical Chemistry  (1)
  • 2005-2009  (3)
  • 2000-2004
  • 2006  (3)
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  • Other Sources  (3)
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  • 2005-2009  (3)
  • 2000-2004
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  • 1
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    Dust Devil Tracks and Wind Streaks in the North Polar Region of Mars: A Study of the 2007 Phoenix Mars Lander Sites (2006)
    In:  Other Sources
    Details
    Publication Date: 2018-06-11
    Description: The 65-72 latitude band of the North Polar Region of Mars, where the 2007 Phoenix Mars Lander will land, was studied using satellite images from the Mars Global Surveyor (MGS) Mars Orbiter Camera Narrow-Angle (MOC-NA) camera. Dust devil tracks (DDT) and wind streaks (WS) were observed and recorded as surface evidence for winds. No active dust devils (DDs) were observed. 162 MOC-NA images, 10.3% of total images, contained DDT/WS. Phoenix landing Region C (295-315W) had the highest concentration of images containing DDT/WS per number of available images (20.9%); Region D (130-150W) had the lowest (3.5%). DDT and WS direction were recorded for Phoenix landing regions A (110-130W), B (240-260W), and C to infer local wind direction. Region A showed dominant northwest-southeast DDT/WS, Region B showed dominant north-south, east-west and northeast-southwest DDT/WS, and region C showed dominant west/northwest - east/southeast DDT/ WS. Results indicate the 2007 Phoenix Lander has the highest probability of landing near DDT/WS in landing Region C. Based on DDT/WS linearity, we infer Phoenix would likely encounter directionally consistent background wind in any of the three regions.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Geophysical Research Letters (ISSN 0094-826); Volume 33
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Contamination Detection and Mitigation Strategies for Unsymmetric Dimethylhydrazine/Nitrogen Tetroxide Non-Combustion Product Residues (2006)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: Dimethylamine and nitrite, which are non-combustion reaction products of unsymmetrical dimethylhydrazine (UDMH) and nitrogen tetroxide (NTO) propellants, can contaminate spacesuits during extra-vehicular activity (EVA) operations. They can react with water in the International Space Station (ISS) airlock to form N-nitrosodimethylamine (NDMA), a carcinogen. Detection methods for assessing nitrite and dimethylamine contamination were investigated. The methods are based on color-forming reactions in which intensity of color is proportional to concentration. A concept color detection kit using a commercially available presumptive field test for methamphetamine coupled with nitrite test strips was developed and used to detect dimethylamine and nitrite. Contamination mitigation strategies were also developed.
    Keywords: Inorganic, Organic and Physical Chemistry
    Type: 22nd S and EPS; Mar 06, 2006 - Mar 10, 2006; Sandestin, FL; United States|JANNAF 33rd PEDCS; Mar 06, 2006 - Mar 10, 2006; Sandestin, FL; United States
    Format: application/pdf
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  • 3
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    Architecting Space Exploration Campaigns: A Decision-Analytic Approach (2006)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: This paper shows the benefits of Decision Analysis techniques for campaign design and evaluation. Important concepts of decision analysis are reviewed through the lens of designing a campaign to find exploitable equatorial water on Mars. The method developed herein is general to any search campaign. The paper concludes with a discussion of the challenges and opportunities in applying similar techniques to other types of campaigns.
    Keywords: Lunar and Planetary Science and Exploration
    Type: IEEE Aerospace Conference; Mar 04, 2006 - Mar 21, 2006; Big Sky, MT; United States
    Format: text
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    NASA TECHNICAL REPORTS
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