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  • 1
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    NASA Global Atmospheric Sampling Program (GASP) data report for tape VL0015, VL0016, VL0017, VL0018, VL0019, and VL0020 (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This is the twelfth of a series of reports which describes the data currently available from GASP, including flight routes and dates, instrumentation, data processing procedures, and data tape specifications. In-situ measurements of atmospheric ozone, cabin ozone, carbon monoxide, water vapor, particles, clouds, condensation nuclei, filter samples and related meteorological and flight information obtained during 1732 flights of aircraft N533PA, N4711U, N655PA, and VH-EBE from January 5, 1978 through October 9, 1978 are reported. These data are now available from the National Climatic Center, Asheville, NC, 22801. In addition to the GASP data, tropopause pressures obtained from time ans space interpolation of National Meteorological Center archived data for the dates of the flights are included.
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA-TM-81661 , E-679
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    NASA Global Atmospheric Sampling Program (GASP) data report for tape VL0014 (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The data currently available from GASP, including flight routes and dates, instrumentation, data processing procedures, and data tape specifications are described. Measurements of atmospheric ozone, cabin ozine, carbon monoxide, water vapor, particles, clouds, condensation nuclei, filter samples and related meteorological and flight information obtained during 562 flights of aircraft N533PA, N4711U, N655PA, and VH-EBE from October 3, 1977 through January 5, 1978 are reported. Data representing tropopause pressures obtained from time and space interpolation of National Meteorological Center archived data for the dates of the flights are included.
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA-TM-81579 , E-549
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Ozone concentration in the cabin of a Gates Learjet measured simultaneously with atmospheric ozone concentrations (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A Gates Learjet Model 23 was instrumented with monitors to measure simultaneously the atmospheric and the cabin concentrations of ozone at altitudes up to 13 kilometers. Six data flights were made in February 1978. Results indicated that only a small amount of the atmospheric ozone is destroyed in the cabin pressurization system. Ozone concentrations measured in the cabin near the conditioned-air outlets were only slightly lower than the atmospheric ozone concentration. For the two cabin configurations tested, the ozone retention in the cabin was 63 and 41 percent of the atmospheric ozone concentration. Maximum cabin ozone concentration measured during these flights was 410 parts per billion by volume.
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA-TP-1340 , E-9653
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    NASA Global Atmospheric Sampling Program (GASP) data report for tapes VL0007 and VL0008 (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The Global Atmospheric Sampling Program (GASP) is obtaining measurements of atmospheric trace constituents in the upper troposphere and lower stratosphere using fully automated air sampling systems on board the NASA CV-990 research aircraft and four commerical B-747 aircraft in routine airline service. In-situ measurements of atmospheric ozone and water vapor, data from laboratory analysis of filters exposed in flight, and related flight and meteorological data obtained from September 1976 through January 1977 are reported. These data are now available on GASP tapes VL0007 & VL0008 from the National Climatic Center, Asheville, North Carolina. In addition to the GASP data, tropopause pressure fields obtained from NMC archives for the dates of the GASP flights are included on the data tape. Flight routes and dates, instrumentation, data processing procedures, and data tape specifications are described.
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA-TM-73784 , E-9348
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Comparison of ozone measurement techniques using aircraft, balloon, and ground-based measurements (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: In order to verify the ultraviolet absorption technique used in the Global Atmospheric Sampling Program, two flight experiments were conducted employing several techniques, both in situ and remote, for measuring atmospheric ozone. The first experiment used the NASA CV-990 equipped with an ultraviolet absorption ozone monitor and an ultraviolet spectrophotometer, a balloon ozonesonde, and a Dobson station for determining and comparing the ozone concentration data. A second experiment compared ozone data from an automated sampling system aboard a B-747 with data from a manned system installed on the NASA CV-990 during a cross-country flight with both aircraft following the same flight path separated by 32 kilometers.
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA-TM-X-3520 , E-8951
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    In situ measurements of nitric oxide, water vapour and ozone from an aircraft (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: This paper describes flight tests of prototype instruments for the NASA global atmospheric sampling program (GASP). Three gas sampling instruments were included in the installation: (1) a chemiluminescent nitric oxide monitor; (2) an ultraviolet absorption ozone monitor; and (3) an aluminum oxide water vapor hygrometer. Results indicate the range and kind of variability in NO, H2O, and O3 that can be expected in routine tropospheric air sampling. They have also demonstrated the need for increasing instrument sensitivities, particularly in NO measurement.
    Keywords: ENVIRONMENT POLLUTION
    Type: International Conference on the Environmental Impact of Aerospace Operations in the High Atmosphere; Jul 08, 1974 - Jul 10, 1974; San Diego, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    In situ measurements of particulate number density and size distribution from an aircraft (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Two different commercial particulate measuring instruments were flown aboard the NASA Convair 990. A condensation nuclei monitor was utilized to measure particles larger than approximately 0.003 micron in diameter. A specially designed pressurization system was used with this monitor at cabin altitude pressure. A near-forward light scattering counter was used to measure the number and size distribution particles in the size range from 0.5 to 5 microns and greater in diameter. Considerable variation in number density was encountered for both classes of particles at the test altitudes ranging from 5 to 12 km. Presence of clouds could be detected by the light scattering instrument because large numbers of particles would then be registered by the instrument, especially in the size range above 5.0 microns in diameter.
    Keywords: ENVIRONMENT POLLUTION
    Type: International Conference on the Environmental Impact of Aerospace Operations in the High Atmosphere; Jul 08, 1974 - Jul 10, 1974; San Diego, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    In situ measurements of Arctic atmospheric trace constituents from an aircraft (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: In situ measurements of the ambient concentrations of several atmospheric trace constituents were obtained using instruments installed on board the NASA Convair 990 aircraft at altitudes up to 12.5 kilometers over Alaska and the Arctic Ocean. Concentration data on ozone, carbon monoxide, water vapor, and particles larger than 0.5 micrometer in diameter were acquired.
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA-TN-D-8491 , E-9040
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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