An update of the Amsterdam Light Scattering Database

We present an update of the Amsterdam Light Scattering Database located at http://www.astro.uva.nl/scatter. We give a detailed explanation and clarification of the nature of the scattering matrices in the database. Measured scattering matrix elements are presented as functions of the scattering angle, for aerosol particles in random orientation at 632.8 nm. They pertain to seven volcanic dust samples from three different volcanoes, two samples with extreme refractive indices (hematite and rutile), and three forsterite samples with identical compositions, but different size distributions. For 15 phytoplankton species and two types of silt suspended in water, the database now contains two matrix elements, F₁₁ and -F₁₂/F₁₁ as functions of the scattering angle at 632.8 nm. Lastly, we have included all scattering matrix elements as functions of the scattering angle for spherical micron-sized water droplets, which may be used for testing purposes.