Absolute tracer dye concentration using airborne laser-induced water Raman backscatter
Reported here for the first time is the use of simultaneous airborne laser-induced fye fluorescence and the 3400-cm/sup -1/ OH-stretch water Raman backscatter spectra to yield the absolute concentration of an ocean-dispersed tracer dye. Using a straightforward theoretical model, the concentration is calculated by numerically comparing the airborne laser-induced fluorescence and Raman backscatter spectra to similar laboratory data for a known dye concentration measured under comparable environmental and instrumental conditions. The dye is assumed to be uniformly mixed throughout the water column together with other interfering, fluorescent, organic matter. A minimum, detectable integrated water column dye concentration of approx.2 ppb by weight as limited by background and instrument noise is obtained. A dye concentration contour map produced from the conical scan lidar data is given.
- Research Organization:
- NASA Wlalops Flight Center Wallops Island, Virginia 23337
- OSTI ID:
- 6413050
- Journal Information:
- Appl. Opt.; (United States), Vol. 20:7
- Country of Publication:
- United States
- Language:
- English
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