The aerosol lookup tables come as separate files for each wavelength and each aerosol model. Overall, there are 40 aerosol models available for both land and ocean aerosol retrieval.

For the land aerosol retrieval, there are LUTs for the 13 MERIS wavelengths 412, 442, 490, 510, 560, 620, 665, 681, 708, 753, 778, 865 and 885 nm, and the 4 AATSR wavelengths 550, 665, 865 and 1610 nm. Therefore, the full set of land aerosol LUTs comprises 680 files. Although these files are in binary format, the total size is more than 6 GB. For more details on the file contents, see [3] and [6].

For the ocean aerosol retrieval, there are LUTs for the 4 AATSR wavelengths 778, 865, 885 and 1610 nm. Therefore, the full set of ocean aerosol LUTs comprises 680 files. These files are provided in NetCDF format, the total size is about 380 MB. For more details on the file contents, see [2] and [6].

The default surface reflectance spectra are provided in two small ASCII files. The user can specify own reflectance spectra files as processing parameter. For more details on the file contents, see [3] and [6].

The lookup tables for Glint algorithm in ocean aerosol retrieval are provided as two small netCDF files. For more details on the contents of these files, see [2] and [6].

Since the full auxiliary dataset is rather large due to the LUTs for land aerosol retrieval, the auxiliary data are provided as a 'standard' and a 'full' bundle. The standard bundle only contains the three land aerosol models required for the retrieval in default mode (see Section 4.3), which reduces the size of the zip archive to below 1 GB. This is sufficient for most use cases. To specify an own list of land aerosol models to be used by the algorithm, advanced users need to download and install the full bundle.

The auxdata can be downloaded from the BC ftp site: