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  • AIR TRANSPORTATION AND SAFETY  (2)
  • 1985-1989  (2)
  • 1
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    Unknown
    A new reeling technique for very long extension scanning in the stratosphere (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: A balloon-borne winching system has been developed for extending a very long tether with payload down into the stratosphere and recovering it, this has been flight proven by being carrried to an altitude of 40 km, lowering a 62-kg stratospheric photochemistry experiment 12 km at a descent velocity of about 6-8 m/sec and recovering it at comparable velocities. During the first flight, the data gave no evidence of dynamic instabilities due to the system or the stratospheric interactions. The future utility of this payload is discussed with attention to the design factors that bound the range of performance of this type of system.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Type: Advances in Space Research (ISSN 0273-1177); 5; 1, 19; 45-48
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Long extension reeling in the stratosphere - A progress report (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Results of the second flight of the Harvard Reel Down balloon-born winching system, in which a more complex photochemical detection package was twice lowered from a float altitude of 39 km and reeled back to the winch, are reported. Modifications over the original package design include improvements to the winch platform and reconstruction of the suspended detection package for specific ClO measurement and for tight weight control. Controlled velocities of 4-7 m/sec were implemented for both of the scans, and the package was brought to a brief stop during the first scan to evaluate dynamic effects. The results demonstrate the operational effectiveness of the system.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Type: Advances in Space Research (ISSN 0273-1177); 7; 7 19; 97-100
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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