| Main Title |
Comparison of Teleradiometric and Sensitometric Techniques for Visibility Measurements. |
| Author |
Seigneur, C. ;
Hogo, H. ;
Johnson, C. D. ;
|
| CORP Author |
Systems Applications, Inc., San Rafael, CA.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab. |
| Year Published |
1984 |
| Report Number |
EPA-68-02-3225; EPA/600/J-84/400; |
| Stock Number |
PB87-178802 |
| Additional Subjects |
Sensitometers ;
Visibility ;
Plumes ;
Photographs ;
Optical detection ;
Monitors ;
Measurement ;
Air pollution ;
Reprints ;
Teleradiometers ;
VISTTA
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB87-178802 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
9p |
| Abstract |
Visibility measurements of power plant and smelter plumes were conducted as part of the 1981 VISTTA field programs by means of sensitometry of color photographic slides and teleradiometry. The results obtained with these two techniques at three wavelengths (450, 550, and 630 nm) were compared and showed good agreement for plume/sky radiance ratios, with correlation coefficients on the order of 0.9 and average absolute differences of 2 to 4 percent. The uncertainty in the plume/sky radiance ratio is about 4 percent for sensitometry. Although this value is slightly higher than the uncertainty of 2 percent previously reported for teleradiometry (Bergstrom et al., 1982), sensitometry offers the advantage of an instantaneous measurement. In contrast, a teleradiometer scan takes on the order of 15 minutes, and plume visual effects can show large variations in this short time period. (Copyright (c) 1984 Pergamon Press Ltd.) |
| Supplementary Notes |
Pub. in Atmospheric Environment, v18 n1 p227-233 Jan 84. Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: Comparison of Teleradiometric and Sensitometric Techniques for Visibility Measurements. |
| PUB Date Free Form |
c1984 |
| Category Codes |
68A; 48C |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/09 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
716921962 |
| Origin |
NTIS |
| Type |
CAT |
