1. A method of determining an attribute of a target, comprising: fitting multiple sets of concurrently acquired data to a profile template; calculating a variance between said profile template and said data sets; refining said profile template to minimize said variance between at least some of said concurrently acquired data sets to generate a refined profile; correlating said refined profile with data from a data bank stored in memory to generate correlation data; and processing said correlation data to determine said attribute of said target.