The Aerosol Index (AI) is a well-established data product that has been calculated for several different satellite instruments spanning a period of nearly 40 years. The S5P/TROPOMI aerosol index is referred to as the Ultraviolet Aerosol Index (UVAI). The relatively simple calculation of the Aerosol Index is based on wavelength dependent changes in Rayleigh scattering in the UV spectral range where ozone absorption is very small. UVAI can also be calculated in the presence of clouds so that daily, global coverage is possible. This is ideal for tracking the evolution of episodic aerosol plumes from dust outbreaks, volcanic ash, and biomass burning. The figure below depicts several global sources of absorbing aerosols measured by the UVAI.
|Version number||Version Effective Date||Summary of Changes|
|1.0.0||6-Apr-2018 to present||Land surface type flagging improved|
|0.2.0||20-Aug-2017 to 5-Apr-2018||First product release during E1|
USER DOCUMENTATION: ATBD, PUM & SAMPLE DATA
The Algorithm Theoretical Basis Document (ATBD) can be found by clicking here. The Product User Manuals (PUM) and Sample Data Files are being updated based on a new release of the processing software and will be available for download by mid-May 2017.
After launch, preliminary product results will be provided during the Commissioning Phase and the Operational Phase.