Gas Filter Correlation Imagery for HCI Monitoring.
Abstract
The feasibility of applying gas filter correlation techniques and infrared imaging technology to the problem of quantifying gaseous HCl produced in the exhaust of the Space Transportation System (STS) is explored. Modeling of HCl absorption and emission for various spectral bandpasses, atmospheric conditions, and concentrations is performed to obtain estimates of modulated detected power as a function of HCl concentration. Several optical system designs are examined. Results of a laboratory demonstration of the gas filter correlation technique for quantifying HCl while rejecting broadbnad absorbers are presented. The findings of the study are: 1. Commercial infrared imagers do not have sufficient sensitivity to detect HCl emissions; 2. Gas filter correlation systems detecting HCl absorption of solar radiation or a high-intensity source can quantify HCl to better than 30 parts per million-meters (ppm-m); and 3. Specially designed high-sensitivity instruments can be built to detect HCl emissions while operating in a staring mode or slow line scanning mode. Several designs for HCl detection systems are presented with estimates of technical feasibility. Potential applications of this work include inexpensive remote monitoring of industrial gaseous pollutants discharged into the atmosphere. Keywords: Pollutant monitoring; Environmental Protection Technology.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1986
- Accession Number
- ADA166386
Entities
People
- Brian K. Matise
- Frederick G. Smith
- Lucian W. Chaney
- Timothy J. Rogne