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  • 11
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    Description and review of global measurements of atmospheric species from GASP (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A large volume of atmospheric constituent data is being collected in the global airlanes by specially equipped B-747 aircraft. This NASA program also obtains data from the similarly equipped NASA CV-990 aircraft during dedicated flights such as a recent near pole-to-pole latitude survey mission. Aerosol composition data are also collected with a NASA F-106 aircraft. Present measurements include ozone, carbon monoxide, water vapor, aerosol and condensation nuclei number densities, sulphates, nitrates, and the chlorofluoromethanes. Meteorological and flight parameters are also recorded for use in data analysis. The present aircraft operations obtain data between 6 and 13.5 km from 65 deg N between Europe and the North Pacific, and from 23 deg S over South America and 42 deg S over New Zealand. Typical constituent data from the aircraft operations during the first one and a half years are presented. Instrumentation is discussed.
    Keywords: GEOPHYSICS
    Type: Conference on Air Quality Meteorology and Atmospheric Ozone; Jul 31, 1977 - Aug 06, 1977; Boulder, CO; US
    Format: text
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    NASA TECHNICAL REPORTS
  • 12
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    Description and review of global measurements of atmospheric species from GASP (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Aerosol composition data were collected with a NASA F-106 aircraft. Present measurements include ozone, carbon monoxide, water vapor, aerosol and condensation nuclei number densities, sulphates, nitrates, and the chlorofluoromethanes. Meteorological and flight parameters are also recorded for use in data analysis. The present aircraft operations obtain data between 6 and 13.5 km from 65 degree N between Europe and the north Pacific, and from 23 degree S over South America and 42 degree S over New Zealand. Typical constituent data from the aircraft operations during the first one and a half years are presented. Instrumentation is discussed.
    Keywords: GEOPHYSICS
    Type: NASA-TM-73781 , E-9338 , Conf. on Air Quality Meteorology and Atmospheric Ozone; Jul 31, 1977 - Aug 06, 1977; Boulder, CO; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 13
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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
  • 14
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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
  • 15
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    Thermal investigation of an ion engine microthrustor (1967)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Thermal design and analysis of cesium contact-ion microthrustor
    Keywords: PROPULSION SYSTEMS
    Type: NASA-TM-X-1473
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 16
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    Nitric oxide, water vapor, and ozone in the atmosphere as measured in SITU from an aircraft (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: As part of the instrument evaluation plan for the NASA Global Atmospheric Sampling Program, prototype instruments were tested aboard the NASA Convair 990 during four flights in January and February of 1974. All the data were taken in maritime air between Hawaii and San Francisco and between Hawaii and 155 deg W, 35 deg N. A chemiluminescent instrument was used to measure nitric oxide. Water vapor, which was measured by using an aluminum oxide hygrometer, ranged from 5.2 micro g/g to saturation. Ozone was measured by an instrument using the ultraviolet absorption technique and ranged up to 235 ppbv. Typical temporal plots of the concentrations of the three constituents are presented. All the constituents showed considerable spatial and day-to-day variation in concentration at each altitude flown. Measurements of the three constituents were made simultaneously at various altitudes between 7.6 and 12.5 km.
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-3174 , E-8077
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 17
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    Flight test of a pressurization system used to measure minor atmospheric constituents from an aircraft (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A flight evaluation of an ambient air sample pressurization system was conducted at altitudes between 6 and 12 km. The system regulated the sample pressure to 10.15 + or - 0.1 N/sq n and provided sample flow to three gas analysis instruments included in the system. Ozone concentrations measured by two instruments employing different techniques varied from about 30 parts per billion by volume (ppbv) to over 350 ppbv, and the two ozone monitors agreed to within 20 ppbv. A carbon dioxide analyzer indicated modifications required for future installations.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-TN-D-7576 , E-7701
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 18
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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
  • 19
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    Use of an air-assist fuel nozzle to reduce exhaust emissions from a gas turbine combustor at simulated idle conditions (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Use of air-assist fuel nozzle to reduce exhaust emissions from gas turbine combustor at simulated idle conditions - J-57 engine
    Keywords: PROPULSION SYSTEMS
    Type: NASA-TN-D-6404 , E-6247
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 20
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    Effect of fuel distribution and flame stabilization techniques on combustion stability limits for swirl-can combustor modules burning ASTM-A1 fuel (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Effect of fuel distribution and flame stabilization techniques on combustion stability limits for swirl-can combustor modules
    Keywords: PROPULSION SYSTEMS
    Type: NASA-TM-X-2185 , E-5968
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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