Abstract #300731

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JSM 2003 Abstract #300731
Activity Number: 82
Type: Contributed
Date/Time: Monday, August 4, 2003 : 8:30 AM to 10:20 AM
Sponsor: Section on Statistical Consulting
Abstract - #300731
Title: A Study Evaluating Aerosol Particulate Concentration and Size in the Stratospheric Plumes of Rockets
Author(s): Gary Gadbury*+ and Andrew P. Rutter and Donald E. Hagen and Philip Whitefield
Companies: University of Missouri, Rolla and University of Missouri, Rolla and University of Missouri, Rolla and University of Missouri, Rolla
Address: Dept. of Mathematics and Statistics, Rolla, MO, 65409-0001,
Keywords: aerosol ; smoother ; robust ; concentration
Abstract:

The composition of rocket engine emissions are studied to understand their impact on the stratosphere. High altitude aircraft collect particulate data in the exhaust plume from a rocket launch. One instrument used on the aircraft is a laser particle counter (LPC) that measures concentration and size of particulates. The measured concentrations are biased low at high concentrations due to an effect called "coincidence loss." We report on the challenges, issues, and methods to correct for coincidence loss using concentration data for CO2, measured using a different instrument on the aircraft. Smoothing methods are combined with robust regression to associate CO2 measurements with those from a LPC.

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