COMBIC Modifications to Determine Aerosol Cloud Densities for Multiple Obscurant Input Sources

Modifications were made to the Combined Obscuration Model for Battlefield Induced Contaminants (COMBIC) code to obtain aerosol cloud-density values for multiple obscurant types. The main purpose of COMBIC has traditionally been to obtain the transmittance or optical depth for one or more lines of si...

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Bibliographic Details
Main Authors: Mungiole, Michael, Wetmore, Alan
Format: Report
Language:English
Subjects:
AEROSOLS
BATTLEFIELDS
CLOUD CONCENTRATIONS
COMBIC(COMBINED OBSCURATION MODEL FOR BATTLEFIELD INDUCED CONTAMINANTS)
CONTAMINANTS
DEBRIS
DENSITY
DUST CLOUDS
EXPLOSIONS
LINE OF SIGHT
MULTIPLE OBSCURANTS
OBSCURATION
OPTICAL PROPERTIES
Optics
Physical Chemistry
SMOKE MUNITIONS
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Summary:Modifications were made to the Combined Obscuration Model for Battlefield Induced Contaminants (COMBIC) code to obtain aerosol cloud-density values for multiple obscurant types. The main purpose of COMBIC has traditionally been to obtain the transmittance or optical depth for one or more lines of sight (LOS). If one specifies optical depth uses consistent units, and ensures that the product of mass extinction coefficient and optical path length is unity, output values will be numerically equal to the cloud density (g/m3). This report provides information on the required in put values, the modifications made to COMBIC, and the resulting output obtained when one or more sources comprising various obscurant types are provided as input. Examples are included that show various cases containing sources with one or more obscurant types as input. The density output files and the resulting visualized clouds are also given in this report. Specific recommendations for the appropriate input values required to produce valid cloud-density grids are indicated. --Original contains color plates: All DTIC reproductions will be in black and white.