Abstract
The simulation of a line source of aerosol by a moving-point source is set within a mathematical framework that combines characteristics of the boundary-layer turbulence and of the moving source. Comparison of theory with experimental observation shows (i) that a moving source can simulate a true line source and (ii) that the variability in measurements is substantially as predicted by the theory. By regarding a line source as the limiting case of a moving-point source with a very small period of traverse, an expression is derived for the variability in measurements downwind of a true line source.
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