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 months post-launch to next update||Post-Phase E1 updates|
|0.11.8||21-Dec-2017 to present||Minor fixes and updates|
|0.11.4||launch to 20-Dec-2017||First product release|
USER DOCUMENTATION: ATBD, PUM, README, & SAMPLE DATA
The Algorithm Theoretical Basis Document (ATBD) can be found by clicking here and the Product User Manual (PUM) link is located on the right under Documentation. Sample data can be downloaded at the bottom of this page.
After launch, preliminary product results will be provided during the Commissioning Phase E1 and the Operational Phase. Product README (PRF) files will be created during Phase E1 in preparation for the Operational Phase.