Algorithms for ocean-bottom albedo determination from in-water natural-light measurements

A method for determining the ocean-bottom optical albedo R-b from in-water upward and downward irradiance measurements at a shallow site is presented, tested, and compared with a more familiar approach that requires additiona l measurements at a nearby deep-water site. Also presented are two new algo rithms for estimating R-b from measurements of the downward irradiance and vertically upward radiance. All methods performed well in numerical situati ons at depths at which the influence of the bottom on the light field was s ignificant. (C) 1999 Optical Society of America.