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Title: Measurements of the particles and gases in the ground cloud from an Atlas/Centaur rocket

Abstract

Fifty-two airborne penetrations were made of the concentrations of NO and NO/sub 2/. The rate of conversion of NO to NO/sub 2/ was limited by the rate at which ambient O/sub 3/ was mixed into the ground cloud. Methane concentrations in the ground cloud were similar to those in the ambient air, but up to 49 min after the launch the total non-methane hydrocarbon in the ground cloud was slightly higher than in the ambient air.The concentrations of particles in the ground cloud were particularly prominent around particle sizes of 5 x 10/sup -3/ ..mu..m and 0.1 ..mu..m. The larger particles were probably due to direct injection from the rocket and the smaller particles to gas-to-particle conversion in the plume. Within 25 min of the launch, most of the mass of the particles in the ground cloud were less than a few micrometers in size. The average of the particles was 1.1 g m/sup -3/. The total mass of particles having diameters < 2 ..mu..m remained fairly constant after the initial sedimentation process for at least 70 min, but it was surprisingly small (approx. 1 kg, or 0.012.2% of the propellant that was burned).

Authors:
; ; ;
Publication Date:
Research Org.:
Washington Univ., Seattle (USA). Dept. of Atmospheric Sciences
OSTI Identifier:
5064144
Report Number(s):
ANL/EES-TM-98
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; ATLAS ROCKETS; EXHAUST GASES; METHANE; MONITORING; NITRIC OXIDE; NITROGEN DIOXIDE; OZONE; ROCKETS; AEROSOL MONITORING; AEROSOLS; AIR POLLUTION; CLOUDS; DATA COMPILATION; GRAPHS; PARTICLES; SPACE FLIGHT; TABLES; ALKANES; CHALCOGENIDES; COLLOIDS; DATA; DATA FORMS; DISPERSIONS; GASEOUS WASTES; HYDROCARBONS; INFORMATION; NITROGEN COMPOUNDS; NITROGEN OXIDES; NUMERICAL DATA; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; POLLUTION; SOLS; WASTES; 500200* - Environment, Atmospheric- Chemicals Monitoring & Transport- (-1989)

Citation Formats

Radke, L.F., Eltgroth, M.W., Hegg, D.A., and Hobbs, P.V. Measurements of the particles and gases in the ground cloud from an Atlas/Centaur rocket. United States: N. p., 1979. Web. doi:10.2172/5064144.
Radke, L.F., Eltgroth, M.W., Hegg, D.A., & Hobbs, P.V. Measurements of the particles and gases in the ground cloud from an Atlas/Centaur rocket. United States. doi:10.2172/5064144.
Radke, L.F., Eltgroth, M.W., Hegg, D.A., and Hobbs, P.V. Thu . "Measurements of the particles and gases in the ground cloud from an Atlas/Centaur rocket". United States. doi:10.2172/5064144. https://www.osti.gov/servlets/purl/5064144.
@article{osti_5064144,
title = {Measurements of the particles and gases in the ground cloud from an Atlas/Centaur rocket},
author = {Radke, L.F. and Eltgroth, M.W. and Hegg, D.A. and Hobbs, P.V.},
abstractNote = {Fifty-two airborne penetrations were made of the concentrations of NO and NO/sub 2/. The rate of conversion of NO to NO/sub 2/ was limited by the rate at which ambient O/sub 3/ was mixed into the ground cloud. Methane concentrations in the ground cloud were similar to those in the ambient air, but up to 49 min after the launch the total non-methane hydrocarbon in the ground cloud was slightly higher than in the ambient air.The concentrations of particles in the ground cloud were particularly prominent around particle sizes of 5 x 10/sup -3/ ..mu..m and 0.1 ..mu..m. The larger particles were probably due to direct injection from the rocket and the smaller particles to gas-to-particle conversion in the plume. Within 25 min of the launch, most of the mass of the particles in the ground cloud were less than a few micrometers in size. The average of the particles was 1.1 g m/sup -3/. The total mass of particles having diameters < 2 ..mu..m remained fairly constant after the initial sedimentation process for at least 70 min, but it was surprisingly small (approx. 1 kg, or 0.012.2% of the propellant that was burned).},
doi = {10.2172/5064144},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {2}
}