[1] NASA, Goddard Space Flight Ctr, Ocean Biol Proc Grp, Greenbelt, MD 20771 USA
[2] Sci Syst & Applicat Inc SSAI, Lanham, MD 20706 USA
[3] Florida Atlantic Univ, Harbor Branch Oceanog Inst, Ocean Visibil & Opt Lab, Ft Pierce, FL 34946 USA
[4] Florida Atlantic Univ, Harbor Branch Oceanog Inst, Indian River Lagoon Observ, Ft Pierce, FL USA