Of the many error sources associated with airborne laser hydrography, one of the potentially most serious is the effect of underwater light propagation, i.e., the scattering of the optical beam into a cone of steadily increasing angle. The basic premise of airborne laser hydrography is that the water depth can be determined by measuring the round-trip transit time for a short-duration light pulse which travels to the bottom and back to the surface along a fixed slanted path which makes a known angle from the vertical.

© 1982 Optical Society of America

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