The wavelength reported in the Aerosol_Optical_Depth field is 550 nm. If you wish to calculate the AOD at another wavelength between 400 and 900 nm, they can use the Spectral_AOD_Scaling_Coefficient field, which reports three coefficients (c1, c2, and c3) which yield the AOD as a function of wavelength according to the following equation:
AOD(λ) = c1λ2 + c2λ + c3
You have options for viewing or downloading the data by months, year, optical depth range, and bands.
You can print, or download the data, and metadata.
For additional information we suggest that you read the overview of the Level 3 Data Browser.