Photometric Measurementof
Ground-Level Fugitive Dust Emissionsfrom
Open-Lot Animal Feeding Operations
S. L. M. Preece, B. W. Auvermann, T. Kwon, G. W. Marek, K. Heflin, K. J. BushTexas A&M AgriLife Research, Amarillo TX; University of Minnesota-Duluth, Duluth MN
Photo: J. Sweeten
Photo: S. Sakirkin
Photo: S. Preece
Photo: S. Preece
© 2009, Google Earth
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Dow
nwin
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Contrast in Visually Assessed Dust Conditions
Image Pairs
Inhe
rent
Tar
get
Con
tras
t
Moderate Dust High DustLow Dust
Honing the Approach
• Sky glare• Polarized light• Wide-spectrum CCD• Dust on targets• Number of TEOMs relative to path-length• TEOM-associated errors• Image resolution• RGB to Grayscale conversion equation• Night Measurements
Sky Glare
Polarized Light
Wide Spectrum Camera
Dust on Targets
TEOM Data
• Number of TEOMs• Placement of TEOMs• R2 associated with TEOM data
Image Resolution / Path Length
RGB to Grayscale Conversion
I = (0.2989R) + (0.5870G) + (0.1140B)
Night
Automation
ACKNOWLEDGMENT
The authors gratefully acknowledge the funding support of USDA-CSREES under National Research Initiative grant number 2009-55112-05235.
DISCLAIMER
References to specific, commercial brand names in this paper are not exclusive of other, functionally equivalent brands or products and should not be construed as an endorsement of those brand names by Texas AgriLife Research or any of its research partners.
REFERENCES
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