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  • GEOPHYSICS  (2)
  • AIRCRAFT DESIGN, TESTING AND PERFORMANCE  (1)
  • 1980-1984  (3)
  • 1950-1954
  • 1940-1944
  • 1
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    Measurements of free tropospheric ozone - An aircraft survey from 44 degrees north to 46 south latitude (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Ozone data were obtained in the free troposphere at altitudes of 5 to 7.5 km and at latitudes from 44 degrees N to 46 degrees S during a 3-week period from October 19 to November 4, 1982. Flight trajectories included the continental U.S., Central America, and the western coast of South America. Maximum observed ozone was 110 ppb at about 41 degrees S latitude and at an altitude of 7.3 km (msl). Analysis of the data as a function of latitude showed a region of elevated ozone in the southern latitudes extending from about 2 degrees to 30 degrees in which latitudinal ozone averages (2 degree bands) peaked at about 80 ppb. Ozone concentrations, measured at northern latitudes, were lower, averaging about 35 ppb. A discussion of the data, including comparison with other ozone data sets, is presented.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 89; 9642-964
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Observations of atmospheric ozone - 38 to 76 deg north latitude at altitudes from 8 km to the surface (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Ozone data were obtained from 8 km to the surface and at latitudes from 38 to 76 deg N during January and February 1983. Flight lines covered northeastern U.S., Canada, and Greenland. The results of the latitudinal survey at 5- to 8-km altitude showed O3 mixing ratios to be about 40 ppbv with little variation in latitude. One region of elevated O3 was observed and extended from 54 N to 57 deg N latitude. Ozone reached 150 ppbv at 6.4-km altitude. This sampling was stratospheric air as the tropopause height was 5.6-km altitude. Profiles at 76, 67, and 53 deg N showed O3 to be be well mixed from about 5 km to the surface. In some cases, profiles identified a layer of 1 km to 100 m vertical dimension at the surface, in which O3 destruction had occurred.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters (ISSN 0094-8276); 11; 1129-113
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Integrated technology wing design study (1984)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The technology development costs and associated benefits in applying advanced technology associated with the design of a new wing for a new or derivative trijet with a capacity for 350 passengers and maximum range of 8519 km, entering service in 1990 were studied. The areas of technology are: (1) airfoil technology; (2) planform parameters; (3) high lift; (4) pitch active control system; (5) all electric systems; (6) E to 3rd power propulsion; (7) airframe/propulsion integration; (8) graphite/epoxy composites; (9) advanced aluminum alloys; (10) titanium alloys; and (11) silicon carbide/aluminum composites. These technologies were applied to the reference aircraft configuration. Payoffs were determined for block fuel reductions and net value of technology. These technologies are ranked for the ratio of net value of technology (NVT) to technology development costs.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA-CR-3586 , NAS 1.26:3586 , LR-30000
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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