Rapid plume tracking

Elastic scattering is also the basis for Hdar, in which a laser pulse is propagated into a telescope s field of view, and the return signal is collected for detection and in some cases spectral analysis (14,196). The azimuth and elevation of the scatterers (from the orientation of the telescope), their column density (from the intensity), range (from the temporal delay), and velocity (from Doppler shifts) can be deterrnined. Such accurate, rapid three-dimensional spatial information about target species is useful in monitoring air mass movements and plume transport, and for tracking aerosols and pollutants (197). 

Azamethiphos degrades rapidly in seawater and does not bioaccumulate. A study evaluated movement of azamethiphos after application in salmon aquaculture. Dye was added to aid tracking of plumes, and samples were analyzed for azamethiphos content as well as toxicity to a small crustacean. The results suggested that azamethiphos used under recommended conditions posed little contamination or nontarget toxicity potential. 

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