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  • 1
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    Airborne measurements of Space Shuttle exhaust constituents (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: AIAA Journal (ISSN 0001-1452); 23; 283-287
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Hydrogen chloride measurements in the Space Shuttle exhaust cloud - First launch, April 12, 1981 (1982)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Partitioning of hydrogen chloride between the aerosol and gaseous phases in the first Space Shuttle exhaust cloud was experimentally investigated as the exhaust cloud was diluted with ambient air. Airborne measurements were obtained of gaseous hydrogen chloride (HCl), total HCl, relative humidity, and temperature to determine the conditions controlling HCl aerosol formation in the Shuttle exhaust cloud. Two segments of the cloud, each at a significantly different relative humidity, were monitored. Equilibrium predictions of HCl aerosol formation agreed with the measured HCl partitioning at the higher and lower relative humidity conditions, but do not agree at the aerosol formation threshold region. Measurements were taken in the Shuttle exhaust cloud from 8.6 min until 2 h and 8 min after launch. HCl concentrations ranged from 17.5 to 0.9 ppm and relative humidity from 86% to less than 10%.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: Journal of Spacecraft and Rockets; 19; July-Aug
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Laboratory investigations of cloud nuclei from combustion of Space Shuttle propellant (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Small quantities of solid rocket motor propellant, of the type to launch the Space Shuttle, were burned at ambient pressure in the laboratory to provide aerosol samples for characterization. A portion of each sample was injected into an isothermal cloud chamber and the remainder into a 770-liter holding tank. Portable ice nucleus (IN) counters, filter devices for IN determinations and a cloud condensation nucleus (CCN) counter sampled from the tank. The measurements show that particles resulting from the combustion of the propellant are active IN (3.3 times 10 to the 8th to 1.5 times 10 to the 11th/g active at 20 C). The portable counters and filters detected significantly fewer IN than the isothermal cloud chamber. The propellant aerosol is a prolific source of CCN that swamped the instrument.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: Journal of Applied Meteorology; 19; Feb. 198
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Airborne measurements of Space Shuttle exhaust constituents (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Airborne measurements of hydrogen chloride (HCl) and particulates made during penetrations into and flights under Space Shuttle exhaust clouds from launches STS-1, -2, and -5 are presented to permit comparison with dispersion model predictions for Space Shuttle exhaust clouds, and with previous measurements made in Titan III exhaust clouds. Analytical techniques employed for the Shuttle measurements were developed and refined during earlier Titan III exhaust cloud measurements and include the measurements of particulate concentrations, size distributions, and the partitioning of HCl between the gaseous and aerosol phases. The results are useful in understanding the dynamics of ground cloud development, atmospheric dispersion, and potential environmental effects of Shuttle effluents.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: AIAA PAPER 83-2587
    Format: text
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    NASA TECHNICAL REPORTS
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