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  • INORGANIC AND PHYSICAL CHEMISTRY  (3)
  • AIR TRANSPORTATION AND SAFETY  (2)
  • 1
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    Measurement of O(P3), O3, OH, HO2, H2O, NO, NO2, Cl, ClO and HCl in the stratosphere of the Earth and development of measurement techniques for CH4, Br, BrO and HNO3 (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: NASA, Washington Upper Atmosphere Res. Program; p 10-12
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    A new reeling technique for very long extension scanning in the stratosphere (1985)
    In:  Other Sources
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    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
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    NASA TECHNICAL REPORTS
  • 3
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    Kinetics of the reaction OH + D yields OD + H (1975)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: The reaction of OH radicals with D-atoms to form OD has been studied at room temperature in a discharge-flow system utilizing UV resonance fluorescence detection of the molecular species. A rate constant of approximately 1.3 by 10 to the -10th power cu cm per sec is reported where the error limits include systematic error estimates. Astrophysical and kinetic implications are discussed briefly.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: Chemical Physics Letters; 34; Aug. 1
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  • 4
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    Kinetics of the reaction OH + HNO3 yields H2O + NO3 (1975)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: The reaction OH + HN3 yields H2O + NO3 was studied over the temperature range 270-470 K in a flow system utilizing UV resonance fluorescence detection of OH. A temperature independent rate constant of (8.9 plus or minus 1.3) x 10 to the -14 cu cm/s was obtained, where the reported uncertainty represents a single standard deviation including estimates of systematic errors.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: Symposium on Chemical Kinetics Data for the Upper and Lower Atmosphere; Sep 15, 1974 - Sep 18, 1974; Warrenton, VA
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  • 5
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    Long extension reeling in the stratosphere - A progress report (1987)
    In:  Other Sources
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    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
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    NASA TECHNICAL REPORTS
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