Diffuse Attenuation Coef. K490, Aqua MODIS, NPP, 0.0125Â°, West US, 2002-present (Monthly Composite), Lon+/-180
NASA distributes Diffuse Attenuation Coefficient at 490 nm Wavelength data from NASA's Aqua satellite.  Measurements are gathered by the Moderate Resolution Imaging Spectroradiometer (MODIS) carried aboard the spacecraft.