Accession Number:

ADB004783

Title:

The Detection and Tracking of Stack Effluent with a Forward Looking Infrared Imaging Sensor

Descriptive Note:

Technical rept.

Corporate Author:

NAVAL SURFACE WEAPONS CENTER DAHLGREN LAB VA

Report Date:

1975-06-01

Pagination or Media Count:

48.0

Abstract:

Experimental results of using a forward looking infrared FLIR thermal imaging system to monitor the spray dryer stack effluent at Rocky Mountain Arsenal, Colorado, are presented. The effluent was emitted in the demilitarization process of GB nerve gas. Since the effluent was mostly water vapor with very small quantities of residue GB, a strong infrared absorber that approximated the molecular weight of GB, sulfur hexafluoride SF6, was added to the stack to aid tracking. Without the SF6, the plume extent was seen as readily by visual means as with a FLIR. With SF6 added to the stack, the plume was tracked from ranges of hundreds of yards to several miles, depending upon the meteorological and background conditions. Finally, two FLIR units, in conjunction with a mobile air sampler unit of the Army Environmental Hygiene Agency, used triangulation to successfully locate the area where the spray dryer plume reached ground level under several meteorological conditions. Furthermore, it was concluded that a thermal imaging device, coupled with a high spectral resolution spectrometer, would be useful in detecting air pollution during day or night operations.

Subject Categories:

  • Chemical, Biological and Radiological Warfare
  • Infrared Detection and Detectors
  • Air Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE